CONTENTS
1. DESCRIPTION
1.1 Unit Description ...............................................................................................1
1.2 Unit Features ...................................................................................................1
1.3 Specifications ..................................................................................................2
2. INSTALLATION
2.1 General Mounting Hints...................................................................................6
2.2 Mounting Diagrams .........................................................................................6
3. APPLICATIONS
3.1 Liquid Volume ..................................................................................................7
3.2 Corrected Liquid Volume .................................................................................8
3.3 Liquid Mass .....................................................................................................9
3.4 Batching ........................................................................................................10
4. WIRING
4.1 Typical Batcher Wiring................................................................................... 11
4.2 Typical Rate/Total Wiring ............................................................................... 11
4.3 Wiring In Hazardous Areas............................................................................12
5. UNIT OPERATION
5.1 Front Panel Operation Concept for Run Mode..............................................13
5.2 General Operation .........................................................................................14
5.3 Ratemeter/Totalizer Operation ......................................................................14
5.3.1 Password Protection for Rate/Total mode ......................................14
5.3.2 Relay Operation in Rate/Total mode...............................................14
5.3.3 Pulse Output in Rate/Total mode ....................................................14
5.3.4 Analog Output in Rate/Total mode ..................................................14
5.3.5 RS-232 Serial Port Operation in Rate/Total mode .........................15
5.3.6 RS-485 Serial Port Operation in Rate/Total mode .........................15
5.4 Batcher Operation .........................................................................................16
5.4.1 Batcher Configuration .....................................................................16
5.4.2 Password Protection for Batcher mode ..........................................17
5.4.3 Relay Operation in Batcher mode ..................................................17
5.4.4 Pulse Output in Batcher mode.......................................................17
5.4.5 Analog Output in Batcher mode......................................................17
5.4.6 RS-232 Serial Port Operation in Batcher mode.............................18
5.4.7 RS-485 Serial Port Operation in Batcher mode.............................18
6. PROGRAMMING
6.1 Front Panel Operation Concept for Program Mode.......................................19
6.2 EZ Setup .......................................................................................................20
6.3 Setup Menus .................................................................................................21
6.4 Setup Sub-Menus..........................................................................................22
6.4.1 SELECT EZ SETUP .......................................................................22
6.4.2 INSTRUMENT TYPE......................................................................22
6.4.3 SELECT FLOW EQUATION...........................................................23
6.4.4 SETUP INDICATORS (Total) ..........................................................23
6.4.5 SETUP INDICATORS (Density) .....................................................23
6.4.6 SETUP INDICATORS (Rate) ..........................................................24
6.4.7 SETUP INDICATORS (Temperature) .............................................24
6.4.8 SETUP FLOW INPUT (Pulse - Ain & PS (A=B)) ............................25
6.4.9 SETUP FLOW INPUT (Pulse - Quadrature, Qx1 or Qx2) ..............26
6.4.10 SETUP FLOW INPUT (Analog) ....................................................27
6.4.11 SETUP AUX INPUT ......................................................................28
6.4.12 SET FLUID PROPERTIES ...........................................................29
6.4.13 SETUP PULSE OUTPUT .............................................................29
6.4.14 SETUP ANALOG OUTPUT ..........................................................30
6.4.15 SETUP RELAYS...........................................................................30
6.4.16 SETUP CONTROL INPUTS(RATE/TOTAL) ................................ 32
6.4.17 SETUP CONTROL INPUTS(BATCH)...........................................32
6.4.18 SETUP REALTIME CLOCK(Time) ...............................................33
6.4.19 SETUP REALTIME CLOCK(Date)................................................33
6.4.20 SERIAL USAGE ...........................................................................34
6.4.21 SET DATALOG/PRINT(Configure) ...............................................35
6.4.22 SET DATALOG/PRINT (Select_list) .............................................36
6.4.23 ADMINISTRATIVE SETUP ...........................................................36
6.4.24 SETUP NETWORK CARD ...........................................................37
99579 08/21/03
i
CONTENTS
7. PRINCIPLE OF OPERATION
7.1 General..........................................................................................................38
7.2 Orifice Flowmeter Considerations .................................................................38
7.3 Flow Equations ..............................................................................................38
7.4 Calculating the Expansion Factor..................................................................41
7.5 Computation of Viscosity Coef. A and B ........................................................42
7.6 Linearization Table ........................................................................................43
7.6.1 Linearization Table General Information .........................................43
7.6.2 Linearization Table for Pulse Inputs................................................43
7.6.3 Linearization Table for Analog Inputs..............................................43
7.6.4 Linearization Table Interpolation .....................................................43
8. TEST, SERVICE and MAINTENANCE
8.1 Test Menus ....................................................................................................44
8.2 Test Sub-Menus ............................................................................................45
8.2.1 Audit Trail ........................................................................................45
8.2.2 Error History ...................................................................................45
8.2.3 Print System Setup .........................................................................45
8.2.4 Keypad test.....................................................................................46
8.2.5 Display test .....................................................................................46
8.2.6 Calibrate CH1 0mA.........................................................................47
8.2.7 Calibrate CH1 20mA.......................................................................47
8.2.8 Calibrate CH2 0mA.........................................................................48
8.2.9 Calibrate CH2 20mA.......................................................................48
8.2.10 Calibrate CH1 0V..........................................................................49
8.2.11 Calibrate CH1 10V ........................................................................49
8.2.12 Calibrate CH2 0V..........................................................................50
8.2.13 Calibrate CH2 10V........................................................................50
8.2.14 Calibrate 100 ohm RTD ................................................................50
8.2.15 Calibrate 4mA Out ........................................................................51
8.2.16 Calibrate 20mA Out ......................................................................51
8.2.17 Analog In Test ...............................................................................51
8.2.18 Pulse input test .............................................................................52
8.2.19 Analog out test ..............................................................................52
8.2.20 Excitation out test .........................................................................52
8.2.21 Pulse out test ................................................................................53
8.2.22 Relay test.....................................................................................53
8.2.23 Control input test ..........................................................................53
8.2.24 Battery Voltage test ......................................................................54
8.2.25 Data logger utility ..........................................................................54
8.3 Internal Fuse Replacement ...........................................................................55
9. RS-232 SERIAL PORT
9.1 RS-232 Serial Port Description .....................................................................56
9.2 Instrument Setup by PC Over Serial Port......................................................56
9.3 Operation of Serial Communication Port with Printers ..................................56
9.4 FC-21 RS-232 Port Pinout ............................................................................56
10. RS-485 SERIAL PORT
10.1 RS-485 Serial Port Description ...................................................................57
10.2 General........................................................................................................57
10.3 Operation of Serial Communication Port with PC .......................................57
10.4 FC-21 RS-485 Port Pinout ..........................................................................57
11. FLOW COMPUTER SETUP SOFTWARE
11.1 System Requirements .................................................................................58
11.2 Cable and Wiring Requirements..................................................................58
11.3 Installation for Windows™3.1 or 3.11 ..........................................................58
11.4 Using the Flow Computer Setup Software ..................................................59
11.5 File Tab ........................................................................................................59
11.6 Setup Tab.....................................................................................................59
11.7 View Tab ......................................................................................................60
11.8 Misc. Tab......................................................................................................60
12. GLOSSARY OF TERMS
12 Glossary Of Terms..........................................................................................61
13. DIAGNOSIS AND TROUBLESHOOTING
13.1 Response of FC-21 on Error or Alarm: ........................................................65
13.2 Diagnosis Flow Chart and Troubleshooting.................................................66
13.3 Error & Warning Messages: ........................................................................67
13.3.1 Sensor/Process Alarms ................................................................67
13.3.2 Self Test Alarms ............................................................................68
APPENDIX A
Setup Menus .......................................................................................................69
ii
FC-21 Flow Computer
Unit Description
1. Description
1.1 Unit Description:
The FC-21 Flow Computer satisfies the instrument requirements for a
variety of flowmeter types in liquid applications. Multiple flow equations
and instrument functions are available in a single unit with many advanced
features.
The alphanumeric display shows measured and calculated parameters
in easy to understand format. Single key direct access to measurements
and display scrolling is supported.
The versatility of the FC-21 permits a wide measure of versatility within
the instrument package. The various hardware inputs and outputs can be
“soft” assigned to meet a variety of common application needs. The user
“soft selects” the usage of each input/output while configuring the
instrument. Consider the following illustrative examples.
The isolated analog output can be chosen to follow volume flow, corrected
volume flow, mass flow, temperature, or density by means of a menu
selection. Most hardware features are assignable by this method.
The user can assign the standard RS-232 Serial Port for data logging,
transaction printing, or for connection to a modem for remote meter
reading.
1.2 Unit Features:
Unit Features
The FC-21 Flow Computer offers the following features:
• Custody Transfer with Audit Trail
• Multiple Instrument Functions
• Menu Selectable Hardware & Software Features
• Two Line LCD or VFD Display
• Foreign Language Options
• Isolated Outputs Standard
• Versatile RS-232 Port Standard
• DIN Enclosure with Two Piece Connector
• Optional Networking Cards
• Advanced Batching Features
1
FC-21 Flow Computer
1.3 Specifications:
Specifications:
Pulse Inputs:
Environmental
Number of Flow Inputs: one
Configurations supported: single input with or
without quadrature (menu selectable)
Input Impedance: 10 KΩ nominal
Pullup Resistance: 10 KΩ to 5 VDC (menu
selectable)
Indoor Use
Altitude up to 2000m
Operating Temperature: 0°C to +50°C
(-20°C to 55°C optional)
Storage Temperature: -40°C to +85 C
Maximum Relative Humidity : 80% for temperatures
up to 31°C decreasing linearly to 50% RH at
40°C
Mains supply voltage fluctuations not to exceed ±10%
of the nominal voltage
Pull Down Resistance: 10 KΩ to common
Trigger Level: (menu selectable)
High Level Input
Logic On:
Logic Off:
3 to 30 VDC
0 to 1 VDC
Transient overvoltage according to INSTALLATION
CATEGORY II (see UL 3101-1 Annex J)
POLLUTION DEGREE 2 in accordance with
IEC 664 (see 3.7.3)
Low Level Input (mag pickup)
Selectable sensitivity: 10 mV & 100 mV
Minimum Count Speed: User selectable
Maximum Count Speed: Selectable: 0 to 20kHz
Overvoltage Protection: 50 VDC
Materials: UL, CSA, VDE approved
Fast Transient: Protected to 500 VDC
(Capacitive Clamp)
Approvals: CE Approved Light Industrial,
UL File #: E192404
CSA Pending
Compensation Input
The compensation input is menu selectable for
temperature, density or not used.
Display
Type: 2 lines of 20 characters
Types: Backlit LCD or VFD ordering options
Character Size: 0.3" nominal
User selectable label descriptors and units of
measure
Operation: Ratiometric
Accuracy: 0.01% FS
Thermal Drift: Less than 100 ppm/C
Basic Measurement Resolution: 16 bit
Update Rate: 1 update/sec minimum
Automatic Fault detection:
Signal Over-range/under-range
Current Loop Broken
Keypad
Keypad Type: Membrane Keypad
Keypad Rating: Sealed to Nema 4
Number of keys: 16
RTD short
RTD open
Enclosure
Fault mode to user defined default settings
Size: See Dimensions
Depth behind panel: 6.5" including mating connector
Type: DIN
Materials: Plastic, UL94V-0, Flame retardant
Bezel: Textured per matt finish
Equipment Labels: Model, safety, and user wiring
Transient Protection: 500 V (Capacitive Clamp)
Reverse Polarity: No ill effects
Over-Voltage Limit (Voltage Input): 50 VDC
Available Input Ranges
Voltage: 0-10 VDC, 0-5 VDC, 1-5 VDC
Current: 4-20 mA, 0-20 mA
Power Input
The factory equipped power option is internally fused.
An internal line to line filter capacitor is provided for
added transient suppression.
Resistance: 100 Ohms DIN RTD
100 Ohm DIN RTD (DIN 42-760, BS 1904):
Three Wire Lead Compensation
Internal RTD linearization learns ice point
resistance
Order Option 1: 110VAC: 85 to 127 Vrms, 50/60 Hz
Order Option 2: 220VAC: 170 to 276 Vrms, 50/60 Hz
Order Option 3: 12VDC: 10.5 to 14 VDC
Order Option 4: 24VDC: 18 to 24 VDC
1 mA Excitation current with reverse polarity
protection
Temperature Resolution: 0.01 C
Flow Inputs:
Analog Input:
Ranges
Control Inputs
Voltage: 0-10 VDC, 0-5 VDC, 1-5 VDC
Current: 4-20 mA, 0-20 mA
Basic Measurement Resolution: 16 bit
Update Rate: 5 updates/sec minimum
Automatic Fault detection: Signal over/under-range,
Current Loop Broken
Calibration: Self Calibration and Auto-zero
Continuously
Extended calibration: Learns Zero and Full Scale
of each range using special test mode.
Fault Protection:
Switch Inputs are menu selectable for Start, Stop,
Reset, Lock, Inhibit, Alarm Acknowledge, Print
or Not Used.
Control Input Specifications
Input Scan Rate: 10 scans per second
Logic 1: 4 - 30 VDC
Logic 0: 0 - 0.8 VDC
Transient Suppression: 500 V fast transient
(Capacitive Clamp)
Input Impedance: 100 KΩ
Control Activation: Positive Edge or Pos. Level
based on product definition
Fast Transient: 500 V Protection
(Capacitive Clamp)
Reverse Polarity: No ill effects
Over-Voltage Limit: 50 VDC Over voltage
protection
Excitation Voltage
110/220 VAC Powered Units
Menu Selectable: 5, 12 or 24 VDC @ 100mA
24 VDC Powered Units
Over-Current Protection: Internally current
limited Protected to 24 VDC.
Menu Selectable: 5 or 12 VDC @ 100mA
12 VDC Powered Units
5 VDC @ 100mA
2
FC-21 Flow Computer
Relay Outputs
Operating Mode
The relay outputs are menu assignable to
(Individually for each relay) Low Rate Alarm, Hi
Rate Alarm, Prewarn Alarm, Preset Alarm, Pulse
Output (pulse options) or General purpose warning
(security).
The Flow Computer can be thought of as making a
series of measurements of flow, temperature/
density sensors and then performing calculations
to arrive at a result(s) which is then updated
periodically on the display. The analog output, the
pulse output, and the alarm relays are also updated.
The cycle then repeats itself.
Number of relays: 2 (4 optional)
Contact Style: Form C contacts
Contact Ratings: 250 VAC @ 5 amps
30 VDC @ 5 amps
Step 1:Update the measurements of input signals-
Raw Input Measurements are made at each input
using equations based on input signal type selected.
The system notes the “out of range” input signal as
an alarm condition.
Fast Transient Threshold: 1000 V
Serial Communication
The serial port can be used for printing, datalogging,
modem connection and communication with a Step 2:Compute the Flowing Fluid Parameters-
computer.
RS-232:
The temperature, viscosity, and density equations
are computed as needed based on the flow
equation and input usage selected by the user.
Device ID: 01-99
Baud Rates: 300, 600, 1200, 2400, 4800, 9600,
19200
Step 3 : Compute the Volumetric Flow-
Parity: None, Odd, Even
Uncompensated flow is the term given to the flow
in volume units. The value is computed based on
the flowmeter input type selected and augmented
by any performance enhancing linearization that
has been specified by the user.
Handshaking: None, Software, Hardware
Print Setup: Configurable print list and formatting
RS-485:
Device ID: 01-247
Baud Rates: 300, 600, 1200, 2400, 4800, 9600,
19200
Step 4: Compute the Corrected Volume Flow at
Reference Conditions-
Parity: None, Odd, Even
Protocol: Modbus RTU (Half Duplex)
In the case of a corrected liquid volume flow
calculation, the corrected volume flow is computed
as required by the selected compensation equation.
Analog Output
The analog output is menu assignable to
correspond to the Uncompensated Volume Rate, Step 5 : Compute the Mass Flow-
Corrected Volume Rate, Mass Rate, Temperature,
Density, Volume Total, Corrected Volume Total or
Mass Total.
Type: Isolated Current Sourcing
Isolated I/P/C: 500 V
Available Ranges: 4-20 mA, 0-20 mA
Resolution: 12 bit
Accuracy: 0.05% FS at 20 Degrees C
Update Rate: 1 update/sec minimum
Temperature Drift: Less than 200 ppm/C
Maximum Load: 1000 ohms (at nominal line Step 7: Compute the Analog Output-
voltage)
Compliance Effect: Less than .05% Span
60 Hz rejection: 40 dB minimum
EMI: No effect at 3 V/M
Calibration: Operator assisted Learn Mode
Averaging:User entry of DSP Averaging constant
to cause an smooth control action.
All required information is now available to compute
the mass flow rate as volume flow times density.
Step 6: Check Flow Alarms-
The flow alarm functions have been assigned to
one of the above flow rates during the setup of the
instrument. A comparison is now made by
comparing the current flow rates against the
specified hi and low limits.
This designated flow rate value is now used to
compute the analog output.
Step 8: Compute the Flow Totals by Summation-
A flow total increment is computed for each flow
rate. This increment is computed by multiplying the
respective flow rate by a time base scaler and then
summing. The totalizer format also includes
provisions for total rollover.
Isolated Pulse output
The isolated pulse output is menu assignable to
Uncompensated Volume Total, Compensated Step 9: Total Preset Comparisons-
Volume Total or Mass Total.
Isolation I/O/P: 500 V
The total associated with a preset function is then
compared against the corresponding preset value
and any required control actions taken.
Pulse Output Form: Open Collector
Maximum On Current: 125 mA
Maximum Off Voltage: 30 VDC
Saturation Voltage: 1.0 VDC
Maximum Off Current: 0.1 mA
Pulse Duration: User selectable
Pulse output buffer: 8 bit
Step 10: Pulse Output Service-
The pulse output is next updated by scaling the
total increment which has just been determined by
the pulse output scaler and summing it to any
residual pulse output amount.
Pulse Rate Averaging: Standard
Fault Protection
Step 11: Update Display and Printer Output-
The instrument finally runs a task to update the
various table entries associated with the front panel
display and serial outputs.
Reverse polarity: Shunt Diode
Transient Protection: 500 VDC
(Capacitive Clamp)
3
FC-21 Flow Computer
Setup Mode
Maintenance Mode:
The setup mode is password protected by means of
a numeric lock out code established by the user. In
addition, a secret, manufacturers numeric unlock
entry sequence is available.
The Maintenance Mode of the FC-21 is the Test
and Calibration Mode for the device. This mode
provides a number of specialized utilities required
for factory calibration, instrument checkout on start-
up, and periodic calibration documentation.
The system also provides a minimum implementation
of an “audit trail” which tracks significant setup
changes to the unit. This feature is increasingly being
found of benefit to users or simply required by
Weights and Measurement Officials in systems used
in commerce, trade, or “custody transfer” applications.
A password is required to gain access to this
specialized mode of operation. Normally quality,
calibration, and maintenance personnel will find
this mode of operation very useful. It is also useful
for factory testing.
A Worksheet is provided to assist the user in setting
up the instrument. In addition, a software program is
available which runs on a PC using a RS-232 Serial
for connection to the Flow Computer. Illustrative
examples may be down loaded in this manner.
Many of these tests may be used during start-up
of a new system. Inputs signals may be read, and
output signals may be exercised to verify the
electrical interconnects before the entire system
is put on line.
The setup mode has numerous subgrouping of
parameters needed for flow calculations. There is a
well conceived hierarchy to the setup parameter list.
Selections made at the beginning of the setup affect
offerings further down in the lists.
The following action items may be performed in
the Maintenance Mode:
Print Calibration/Maintenance Report
Examine Audit Trail
Perform Keypad Checkout
Perform Display Checkout
Perform Pulse Input Checkout
Perform Pulse Output Checkout
Perform Control Input Checkout
Perform Relay Output Checkout
Perform Analog Input Checkout
Perform Analog Output Checkout
Calibrate Analog Inputs using the Learn Feature
Calibrate Analog Output using the Learn Feature
Battery Check
In the setup mode, the flow computer activates the
correct setup variables based on the instrument
configuration, the flow equation, and the hardware
selections made for the compensation transmitter
type, the flow transmitter type, and meter
enhancements (linearization) options selected. All
required setup parameters are enabled. All setup
parameters not required are suppressed.
A help line prompt is provided for each entry. In
addition a help message is available which may be
accessed by depressing the “HELP” key.
Note that a calibration of the analog input/output
will advance the audit trail counters since it effects
the accuracy of the system.
In the setup mode selections, several parameters
are required to be input by the operator since these
parameters are blank when the unit is received. The RS-232 Serial Port
user will be prompted for these necessary values for
his application. A blank parameter will prevent the
user from entering the run mode and a suitable
warning message will be issued.
The FC-21 has a general purpose RS-232 Port
which may be used for any one of the following
purposes:
Transaction Printing
Also note that in the setup mode are parameter
selections which have preassigned industry standard
values. The unit will assume these values unless
they are modified by the user.
Data Logging Internal Datalog Dumps
Remote Metering by Modem (optional)
Computer Communication Link
Configuration by Computer
Print System Setup
Most of the process input variables have available a
“default” or emergency value which must be entered.
These are the values that the unit assumes when a
malfunction is determined to have occurred on the Instrument Setup by PC’s over Serial Port
corresponding input.
Print Calibration/Malfunction History
Remote Control
A Diskette program is provided with the FC-21
that enables the user to rapidly configure the FC-
21 using an Personnel Computer. Included on the
diskette are common instrument applications which
may be used as a starting point for your application.
This permits the user to have an excellent starting
point and helps speed the user through the
instrument setup.
It is possible to enter in a nominal constant value for
temperature or density, or analog flow inputs by
placing the desired nominal value into both the lo
and hi values. This is also a convenience when
performing bench top tests without simulators.
4
FC-21 Flow Computer
Operation of Serial Communication Port with
Printers
Operation of Serial Port with Modems (optional)
The FC-21 RS-232 channel supports a number of
operating modes. One of these modes is intended
to support operation with a modem in remote
metering applications. FC-21’s role is that of DTE
effecting file transfers under common file transfer
protocols.
FC-21’s RS-232 channel supports a number of
operating modes. One of these modes is intended
to support operation with a printer in metering
applications requiring transaction printing, data
logging and/or printing of calibration and
maintenance reports.
An external modem is intentionally being used with
the FC-21. This permits use with the variety of
modem standards worldwide while avoiding the
specialized approvals required for equipment that
is deemed to fall under the category of
telecommunication equipment.
For transaction printing, the user defines the items
to be included in the printed document. The user
can also select what initiates the transaction print
generated as part of the setup of the instrument.
The transaction document may be initiated via a
front panel key depression, a remote contact
closure, or upon completion of a batch.
In the modem mode, the FC-21 is assumed to be
operating in a remote metering role. The FC-21 will
support key items in the Hayes Compatible “AT”
Command Set. In this role, the FC-21 will have the
following special abilities:
0. Monitor the modem status as a task of the system
1. Instruct the modem to answer an incoming call
ATA
In data logging, the user defines the items to be
included in each data log as a print list. The user
can also select when or how often he wishes a
data log to be made. This is done during the
setup of the instrument as either a time of day or
as a time interval between logging.
2. Respond to the calling modem at a compatible
baud rate and protocol
The system setup and maintenance report lists
all the instrument setup parameters and usage
for the current instrument configuration. In
addition, the Audit trail information is presented
along with a status report listing any observed
malfunctions which have not been corrected.
3. Perform error checking in conjunction with the
modem
4. Monitor the status of the carrier
5. Terminate the telephone connection in event the
connection is lost.
The user initiates the printing of this report at a
designated point in the menu by pressing the
print key on the front panel.
In addition, the FC-21 will be capable of initiating a
call to a designed telephone number in the event of
a metering malfunction.
5
FC-21 Flow Computer
2. Installation
2.1 General Mounting Hints:
General Mounting
Hints
The FC-21 Flow Computer should be located in an area with a clean, dry
atmosphere which is relatively free of shock and vibration. The unit is
installed in a 5.43" (138mm) wide by 2.68" (68mm) high panel cutout.
(see Mounting Dimensions) To mount the Flow Computer, proceed as
follows:
a. Prepare the panel opening.
Mounting Procedure
b. Slide the unit through the panel cutout until the it touches the panel.
c. Install the screws (provided) in the mounting bracket and slip the
bracket over the rear of the case until it snaps in place.
d. Tighten the screws firmly to attach the bezel to the panel. 3 in. lb. of
torque must be applied and the bezel must be parallel to the panel.
Termination Connectors:
Minimum Wire Gauge:
Maximum Wire Gauge:
22 AWG
14 AWG
Voltage/current limits are limited by unit specifications.
Permanently Connected Equipment:
UL 3101-1, Section 6.12.2.1 specifies that:
• A switch or circuit breaker shall be included in the building
installation;
• It shall be in close proximity to the equipment and within easy
reach of the OPERATOR;
• It shall be marked as the disconnecting device for the equipment.
Ensure that the switch or circuit breaker chosen is suitable for the
power requirements of the unit.
2.2 Mounting Diagrams:
Standard Mounting
Bezel Kit Mounting
FC-21
Bezel Adaptor
Gasket
FC-21
Mounting Bracket
Mounting Bracket
Dimensions
6.15
5.67 (144)
5.43
(138)
(156)
0.5
(13)
0.28 (7.2)
RATE
TOTAL
147.43 GPM
GAL
267395.749
Panel
Cutout
3.43
(87)
2.83
(72)
2.68
(68)
TOTAL
1
RATE
2
PRE
3
1
2
TEMP
4
PRINT
5
CLEAR
MENU
START
STOP
GRAND
6
SCROLL
7
PRE
8
DENS
9
TIME
HELP
•
ENTER
0
–
0.4 (10)
Dotted Line Shows Optional Bezel Kit
6.18
Dimensions are in inches (mm)
6
FC-21 Flow Computer
3. Applications
3.1 Liquid Volume
Measurements:
Liquid Volume
A flowmeter measures the actual volume in a liquid line. A temperature
sensor can also be installed to correct for liquid thermal expansion (see
3.2 Corrected Volume).
Calculations:
• For Flowmeters with Pulse Outputs, Volume flow is calculated using
the flowmeter frequency output and the user entered K-Factor.
• For Flowmeters with Analog Transmitters, Volume flow is calculated
using the measured flowmeter signal and the user entered scale settings.
Output Results:
• Display Results
Flow Rate, Resettable Total, Non-Resettable Total
• Analog Output
Rate or Total
• Pulse Output
Total
• Relay Outputs
Rate or Total Alarms
Applications:
The Flow Computer can monitor actual volume flow and total of any
liquid. Flow alarms are provided via relays and datalogging is available
via analog (4-20mA) and serial outputs.
Liquid Volume
Illustration
TOTAL
1
RATE
2
PRE 1
3
TEMP
4
PRINT
5
CLEAR
MENU
START
STOP
TIME
HELP
•
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
ENTER
0
–
Flowmeter
Calculations
Pulse Input; Average K-Factor
input frequency * time scale factor
K-Factor
Volume Flow =
Analog Input; Linear
Volume Flow = % input * Full Scale Flow
7
FC-21 Flow Computer
Corrected
3.2 Corrected Liquid Volume
Liquid Volume
Measurements:
A flowmeter measures the actual volume in a liquid line. A temperature
sensor is installed to correct for liquid thermal expansion.
Calculations:
• Corrected Volume is calculated using the flow and temperature inputs
as well as the thermal expansion coefficient stored in the flow computer.
Use the "SET FLUID PROPERTIES" submenu to define reference
temperature and density values for standard conditions.
Output Results:
• Display Results
Flow Rate, Resettable Total, Non-Resettable Total, Temperature,
Density
• Analog Output
Rate, Total, Temperature or Density
• Pulse Output
Total
• Relay Outputs
Rate , Total or Temperature Alarms
Applications:
Monitoring corrected volume flow and total of any liquid. Flow alarms are
provided via relays and datalogging is available via analog (4-20mA) and
serial outputs.
Corrected
Liquid Volume
Illustration
TOTAL
1
RATE
2
PRE 1
3
TEMP
4
PRINT
5
CLEAR
MENU
START
STOP
TIME
HELP
•
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
ENTER
0
–
Flowmeter
Temperature Transmitter
Calculations
Volume Flow
As calculated in section 3.1
Corrected Volume Flow (Temp. Transmitter)
Corrected Volume Flow = vol. flow * (1 - Therm.Exp.Coef. *(Tf-Tref))2
8
FC-21 Flow Computer
Liquid Mass
3.3 Liquid Mass
Measurements:
Actual volume is measured by the flow element (DP transmitter,
Flowmeter). Temperature is measured by the temperature transmitter. A
density transmitter can be used for direct density measurements.
Calculations:
• The density and mass flow are calculated using the reference density
and the thermal expansion coefficient of the liquid (see "SET FLUID
PROPERTIES" submenu)
Output Results:
• Display Results
Flow Rate, Resettable Total, Non-Resettable Total, Temperature,
Density
• Analog Output
Rate, Total, Temperature or Density
• Pulse Output
Total
• Relay Outputs
Rate, Total or Temperature Alarms
Applications:
Monitoring mass flow and total of any liquid. Flow alarms are provided via
relays and datalogging is available via analog (4-20mA) and serial outputs.
Liquid Mass
Illustration
TOTAL
1
RATE
2
PRE 1
3
TEMP
4
PRINT
5
TOTAL
1
RATE
2
PRE 1
3
TEMP
4
PRINT
5
CLEAR
MENU
CLEAR
MENU
START
STOP
START
STOP
TIME
HELP
•
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
TIME
HELP
•
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
ENTER
ENTER
0
0
–
–
Flowmeter
Temp./Dens.
Transmitter
Orifice Plate
with DP Transmitter
Temp./Dens.
Transmitter
Volume Flow
As calculated in section 3.1
Mass Flow
Calculations
Mass Flow = volume flow * density
9
FC-21 Flow Computer
Batching
3.4 Batching
Measurements:
A flowmeter measures the actual volume in a liquid line. A temperature
sensor can also be installed to correct for liquid thermal expansion (see
3.2 Corrected Volume).
Calculations:
• For Flowmeters with Pulse Outputs, Volume flow is calculated using
the flowmeter frequency output and the user entered K-Factor.
• For Flowmeters with Analog Transmitters, Volume flow is calculated
using the measured flowmeter signal and the user entered scale settings.
• Corrected Volume is calculated using the flow and temperature inputs
as well as the thermal expansion coefficient stored in the flow computer.
Output Results:
• Display Results
Flow Rate, Batch Total, Non-Resettable Total, Temperature, Density
• Analog Output
Rate, Total, Temperature or Density
• Pulse Output
Total
• Relay Outputs
Batch Total, Rate, or Temperature Alarms
Applications:
Batching and monitoring flow and total of any liquid. Batching is
accomplished via relays and datalogging is available via analog (4-
20mA) and serial outputs.
Batching Illustration
TOTAL
1
RATE
2
PRE 1
3
TEMP
4
PRINT
5
CLEAR
MENU
START
STOP
TIME
HELP
•
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
ENTER
0
–
Flowmeter
Temperature Transmitter
(Optional)
Solenoid Valve
Calculations
Volume Flow
As calculated in section 3.1
Corrected Volume Flow (Temp. Transmitter)
Corrected Vol. Flow = volume flow * (1 - Therm.Exp.Coef. *(Tf-Tref))2
10
FC-21 Flow Computer
4 WIRING
4.1 Typical Batcher Wiring:
Batcher
Wiring
(+) V
Signal
1
2
3
4
5
6
7
8
9
DC OUTPUT
PULSE IN 1
PULSE IN 2
COMMON
---------
FLOW
Vin +
IN
Iin +
Common
Vin +
FLOW SENSOR
RTD EXCIT +
RTD SENS
RTD SENS -
COMP
+
IN
Iin +
Stop
Start
CNTR IN 1
10 CNTR IN 2
11 CNTR IN 3
12 COMMON
SEE USER
MANUAL
13 PULSE OUTPUT +
14 PULSE OUTPUT -
123456
15
Remote Counter
115 VAC
ANALOG OUTPUT +
4-20 mA
16 ANALOG OUTPUT -
MOV
recommended
17 NC
18 COM RLY1
19 NO
25
26
27
28
29
30
NC
COM RLY3
NO
20 NC
21 COM RLY2
22 NO
NC
COM RLY4
NO
115 VAC
SOLENOID VALVE
23 AC LINE
24 AC LINE
DC +
DC -
115 VAC
POWER IN
4.2 Typical Rate/Total Wiring:
Rate / Total
Wiring
(+) V
Signal
1
2
3
4
5
6
7
8
9
DC OUTPUT
PULSE IN 1
PULSE IN 2
COMMON
---------
FLOW
Vin +
Iin +
IN
Common
Vin +
Iin +
FLOW SENSOR
RTD EXCIT +
RTD SENS
RTD SENS -
COMP
IN
+
100 Ohm
DIN RTD
CNTR IN 1
10 CNTR IN 2
11 CNTR IN 3
12 COMMON
SEE USER
MANUAL
123456
13 PULSE OUTPUT +
14 PULSE OUTPUT -
Remote Counter
STRIP CHART
RECORDER
15
ANALOG OUTPUT +
+
4-20 mA
16 ANALOG OUTPUT -
-
17 NC
18 COM RLY1
19 NO
25
26
27
28
29
30
NC
COM RLY3
NO
Alarm Relay 1
{
{
20 NC
21 COM RLY2
22 NO
NC
COM RLY4
NO
Alarm Relay 2
115 VAC
23 AC LINE
24 AC LINE
DC +
DC -
POWER IN
11
FC-21 Flow Computer
4.3 Wiring In Hazardous Areas:
Examples using MLT787S+ Barrier (MTL4755ac for RTD)
Flow Input
Flow Input
Hazardous Area
Safe Area
+
–
4-20
Q/∆P
4-20mA Flow
Transmitter
1
2
3
4
24V Out
28V
Diode
4-20mA In
Common
Temperature Input
(4-20mA Transmitter)
Temperature Input (4-20mA Transmitter)
Hazardous Area
Safe Area
24V Out
Common
1
4
8
–
+
4-20mA Temp.
Transmitter
4-20
28V
4-20mA In
Diode
T
Temperature Input (RTD)
Temperature Input
(RTD)
Hazardous Area
Safe Area
4
5
6
7
8
Common
3-Wire RTD
RTD Excite (+)
RTD Sense (+)
RTD Sense (–)
12
FC-21 Flow Computer
5. UNIT OPERATION
5.1 Front Panel Operation Concept for Run Mode
The FC-21 is fully programmable through the front panel. Please review the
following usage summary before attempting to use the instrument.
TOTAL
1
RATE
2
PRE 1
3
TEMP
4
PRINT
5
CLEAR
MENU
START
STOP
TIME
HELP
•
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
ENTER
0
–
How To Use
On-Line Help
HELP
On-line help is provided to assist the operator in using this product. The help is
available during RUN and SETUP modes simply by pressing the HELP key. The
HELP key is used to enter decimals when entering numeric values.
How To Use
Function Keys
FUNCTION KEYS
In the RUN mode, several keys have a special, direct access feature, to display
an item of interest (i.e. RATE, TOTAL, PRE 1, etc.). Press the key to view your
choice. Press the SCROLL key to return to scrolling display.
How To Clear The
Totalizer
CLEARING TOTALIZER
To clear the total, you must press the TOTAL Function Key 3 times. You will be
asked to verify this action. The operator will be prompted to enter password if the
unit is locked.
NOTE: In the Batcher Mode, simply press the CLEAR key to reset the total (the
batcher must be stopped or finished batching). It is not necessary to press
the TOTAL Function Key first.
How To Clear The
Grand Total
CLEARING GRAND TOTAL
To clear the grand total, you must press the GRAND Function Key 3 times. You
will be asked to verify this action. The supervisor will be prompted to enter the
supervisor password if the unit is locked.
How To Enter
Presets
PRESET KEYS
In the RUN mode, PRE 1 & PRE 2 keys are used to view and/or change the preset
setpoints. To view the Presets, simply press the desired Preset key. Rapidly
press the Preset keys 3 times, then press the Clear key for direct editing of the
preset setpoints.
How To Create a
Scroll List
SCROLL
Rapidly press the Scroll key twice to setup a display list.
Press the CLEAR key to remove old scroll list.
Press the function key for the item you wish to add
Use the ∆ ∇ keys to assign the line.
How To Use
The Print Key
PRINT
The PRINT key is used to print on demand. When the PRINT key is pressed, a
user defined list of data (TOTAL, RATE, PRE 1, etc.) is sent to the RS-232 port. A
timed message of "PRINTING" will be displayed to acknowledge the print request.
How To Use
Special Batching
Keys
SPECIAL BATCHING KEYS
The START and STOP keys are used only when batching to start and stop
batches. The CLEAR key will clear the total without first pressing the TOTAL key
(unit must be stopped). All other keys work the same in both Rate/Total mode and
Batch mode. The Start and Stop keys operation are set by the control input
settings. The Start options are: START or RESET/START. The Stop options are:
STOP or STOP/RESET.
How To Use
The Menu Key
MENU KEY
The MENU key is used to enter the Setup and Test modes. Press the MENU key
to enter the Setup and Test modes. (See section 6 for Setup mode, section 8 for
Test mode). The MENU key is used as "escape" in Setup and Test Programming.
Pressing the MENU key wile programming in the Sub-Menu groups will backup the
display to that Sub-Menu group heading. Pressing the MENU key while viewing
the Sub-Menu groups will backup the display to the Top Level Menu.
How To
Acknowledge Alarms
ACKNOWLEDGING ALARMS
Most alarm messages are self-clearing. Press the ENTER key to acknowledge
and clear alarms.
NOTE: Some keys and functions are password protected. Enter the password to
gain access. The passwords are factory set as follows:
Operator = 0
Supervisor = 2000
13
FC-21 Flow Computer
General
5.2 General Operation
Operation
The unit can display: Rate, Total, Grand Total, Temperature, Density, Presets
and Time of Day. The Temperature and/or Density can be displayed even if
you are using the Volumetric Flow Equation (a Temperature or Density sensor
must be installed). The unit can perform Mass or Corrected Volume equations
using a temperature or density sensor (these equations can be computed
without Temp/Dens sensors by using user defined default values). The unit can
be programmed to perform Ratemeter/Totalizer or Batching functions (see
section 6.3, SELECT INSTRUMENT Submenu).
Rate/Total
Operation
5.3 Ratemeter/Totalizer Operation
The Ratemeter/Totalizer mode is used primarily to monitor flowrate and
accumulated total. The relays can be used to trigger flow, total, temperature or
density alarms.
Password Protection
5.3.1 Password Protection for Rate/Total mode
(Rate/Total mode)
After an Operator and/or Supervisor Password is entered in the setup mode
(see section 6.3, SETUP PASSWORD submenu), the unit will be locked. The
unit will prompt the user for the password when trying to perform the following
functions:
Clear Total
Clear Grand Total
Enter Menu
Edit Preset 1 (PRE 1 Key)
Edit Preset 2 (PRE 2 Key)
The Supervisor password should be reserved for supervisors. The Supervisor
password will allow access to restricted areas of the Setup and Test menus.
Relay Operation
5.3.2 Relay Operation in Rate/Total mode
(Rate/Total mode)
Up to four relays are available (two standard) for alarm outputs. The relays can
be assigned to trip according to rate, total, temperature, density readings or
general system alarms. The relays can be programmed for low or high alarms.
Preset 1 (RLY1) and Preset 2 (RLY2) are easily accessible by pressing the
PRE 1 or PRE 2 key on the front panel. Preset 3 and Preset 4 are accessible
only through the setup menu.
Pulse Output
(Rate/Total mode)
5.3.3 Pulse Output in Rate/Total mode
The isolated pulse output (open collector) is menu assignable to Volume Total,
Corrected Volume Total or Mass Total. The pulse output duration can be set for
10mS (50 Hz max) or 100mS (5 Hz max). A pulse output scale factor (pulse
value) can be set to scale the pulse output. The pulse output is ideal for
connecting to remote totalizers or other devices such as a PLC. See section
1.3 for electrical specifications.
Analog Output
(Rate/Total mode)
5.3.4 Analog Output in Rate/Total mode
The analog output is menu assignable to correspond to the Volume Rate,
Corrected Volume Rate, Mass Rate, Temperature, Density, Volume Total,
Corrected Volume Total or Mass Total. The analog output is ideal for "trend"
tracking using strip chart recorders or other devices.
14
FC-21 Flow Computer
RS-232 Serial Port
5.3.5 RS-232 Serial Port Operation in Rate/Total mode
(Rate/Total mode)
The RS-232 serial port can be used for programming (using the Setup Disk)
or for communicating to printers and computers in the Operating Mode (Run
Mode).
PC Communications:
The Setup Disk also allows the user to query the unit for operating status
such as Flow Rate, Flow Total, Temperature, Density, Presets, etc.
Operation of RS-232 Serial Port with Printers:
Transaction Printing
For transaction printing, the user defines the items to be included in the
printed document (see section 6.3.20 SET DATA OUTPUT, Select_list). The
transaction document can be initiated by pressing the PRINT key or by a
remote contact closure.
Data Logging
In data logging, the user defines the items to be included in each data log
(see section 6.3.20 SET PRINTER OUTPUT, Select_list). The user can also
select when (time of day) or how often (print interval) the data log is to be
made (see section 6.3.19 SET PRINTER OUTPUT, Configure).
System Setup and Maintenance Report
The system setup and maintenance report lists all of the instrument setup
parameters and usage for the current instrument configuration. The audit
trail information and a status report is also printed. This report is initiated in
the Test menu (see section 8.2.3 PRINT SYSTEM SETUP).
RS-485 Serial Port
(Rate/Total mode)
5.3.6 RS-485 Serial Port (optional)
RS-485 Port Description:
The optional RS-485 card utilizes Modbus RTU protocol to access
a variety of process parameters and totalizers. The Relays can
be controlled via Modbus. In addition, action routines can be
executed. For further information, contact factory and request
RS-485 Protocol manual.
Operation of Serial Communication Port with PC
The flow computer's RS-485 channel supports a number of
Modbus RTU commands. Modbus RTU drivers are available
from third party sources for a variety of Man Machine Interface
software for IBM compatible PC's.
The user reads and writes information from/to the RS-485 using
the Modbus RTU commands. The FC-21 then responds to these
information and command requests.
Process variables and totalizers are read in register pairs in
floating point format. Time and date are read as a series of
integer register values. Alarms are individually read as coils.
Action routines are initiated by writing to coils.
15
FC-21 Flow Computer
5.4 Batcher Operation
The Batcher mode is used primarily to control batches. The main difference
between the Batch mode and Rate/Total mode is the relay operation. The
Batch mode allows the operator to "START" the unit via the front panel or
remote input. Once started, the relays (RLY1 & RLY2) will energize and send
power to a flow control device (i.e. solenoid valve or pump). The flow sensor
will send a signal to the unit and total accumulation will begin. When the
Prewarn value (PRE 2) is reached, Relay 2 will drop out (this is ideal for flow
slow down). When the Batch amount (PRE 1) is reached, Relay 1 will drop out
and the Batch is complete.
Several messages will be displayed during normal batch operation (i.e. Batch
Fill, Batch Stopped). The keypad is disabled for the duration of these timed
messages (approx. 2 sec).
Batcher Configuration
5.4.1 Batcher Configuration.
When the unit is programmed for batch mode, several batch operation choices
are available. These choices include: Up or Down Counting, Maximum Batch
Preset, Batch Overrun Compensation, Auto Batch Restart, Time Delay, Flow
Signal Timeout, Maximum Drain Time, Slow Start Quantity, Start or Reset/Start,
and Stop or Stop/Reset.
Batch Count Mode
The Batch Count Mode allows the user to choose whether the unit will batch up
to a preset value or batch down from a preset value to zero.
Maximum Batch Preset
The Maximum Batch Preset allows the user to program the Maximum Batch
value allowed to be entered by the operator. If an operator should try to
program a batch higher then this value, the unit will not allow the value to be
entered and will prompt the user with an error message saying that the Maximum
Batch Preset has been exceeded.
Batch Overrun
The Batch Overrun is used for batch applications that have slow responding
valves and a consistent batching flowrate. When the Batch Overrun is set, the
unit will compensate for batch overruns by computing an averaged overrun
value from the last four batches. This average is used to internally adjust the
batch setpoint to minimize overrun.
Auto Batch Restart
The Auto Batch Restart function allows the user to set an amount of time to
automatically restart a batch after the completion of a batch. This time can be
set from 1 to 99 seconds.
Time Delay
The Time Delay for Auto Batch Restart functions as follows: When a batch is
completed, the next batch will automatically start after the amount of time
entered here.
Flow Signal Timeout
The Flow Signal Timeout allows the user to enter a timeout of 0 to 99 seconds.
If a batch is “Filling” and zero flow persists for more than the user entered time
then the batch will be aborted. This prevents over flows due to faulty flow
sensors and/or wiring.
Maximum Drain Time
The unit declares that a batch is “done” when the flow rate equals “0”. A flow
rate may be present long after the Preset Relay de-energizes due to slow
reacting valves or leaky valves. The Maximum Drain Time allows the user to
enter an amount of time (0 to 99 seconds) to wait before declaring “Batch
Done”. After the Preset Batch quantity is reached, the unit will declare “Batch
Done” when the flow rate is “0” or the Maximum Drain Time has expired. The
batch data will then be available for printing and datalogging.
16
FC-21 Flow Computer
Slow Start Quantity
The Slow Start Quantity is a function that allows an amount to be entered for a
Slow Start up. This function requires two stage valve control. RLY 1 (slow flow)
will energize for Slow Start and RLY 2 (fast flow) will energize after the Slow
Start Quantity has been delivered. This helps reduce turbulence when filling an
empty container.
START, RESET/START and STOP, STOP/RESET
When configuring the control inputs, Control Input1 can be set for START or
RESET/START. When set for START, the unit will start batching when a signal
is applied to Control Input1 or the front panel Start key is pressed. A separate
Reset signal must be used to clear the previous batch total. When set for
RESET/START, the unit will automatically reset then start when a signal is
applied to Control Input1 or the front panel Start key is pressed (provided that
the pervious batch was completed). If a previous batch was stopped during a
batch cycle, the unit will Start from where it was stopped.
Control Input 2 can be set for STOP or STOP/RESET. When set for STOP, the
unit will stop batching when a signal is applied to Control Input 2 or the front
panel Stop key is pressed. A separate Reset signal must be used to clear the
batch total. When set for STOP/RESET, a running batch will stop when a
signal is applied to Control Input 2 or the front panel Stop key is pressed. If the
unit is Stopped or after a completed batch, the unit will reset when a signal is
applied to Control Input 2 or the front panel Stop key is pressed.
NOTE: Applying a voltage level to Control Input 2 will inhibit all Start inputs in
either mode.
Password Protection
(Batch mode)
5.4.2 Password Protection for Batcher Mode
After an Operator and/or Supervisor Password is entered in the setup mode
(see section 6.3, SETUP PASSWORD submenu), the unit will be locked. The
unit will prompt the user for the password when trying to perform the following
functions:
Clear Grand Total
Enter Menu
The Supervisor password should be reserved for supervisors. The Supervisor
password will allow access to restricted areas of the Setup and Test menus.
The passwords are factory set as follows:
Operator = 0
Supervisor = 2000
Relay Operation
(Batch mode)
5.4.3 Relay Operation in Batcher mode
Up to four relays are available (two standard) for alarm outputs. Preset 1
(RLY1) is reserved for batch amount, Preset 2 (RLY2) is reserved for prewarn.
(see section 5.4 Batcher Operation for Relay 1 & Relay 2 functions)
Preset 1 (RLY1) and Preset 2 (RLY2) are easily accessible by pressing the PRE
1 or PRE 2 key on the front panel. Preset 3 and Preset 4 are accessible only
through the setup menu.
Relays 3 and 4 can be assigned to trip according to rate, total, temperature,
overrun or alarm. When Rate is selected the relays can be programmed for low
or high alarms.
Pulse Output
(Batch mode)
5.4.4 Pulse Output in Batcher mode
The isolated pulse output (open collector) is menu assignable to Volume Total,
Corrected Volume Total or Mass Total. The pulse output duration can be set for
10mS (50 Hz max) or 100mS (5 Hz max). A pulse output scale factor (pulse
value) can be set to scale the pulse output. The pulse output is ideal for
connecting to remote totalizers or other devices such as a PLC. See section 1.3
for electrical specifications.
Analog Output
(Batch mode)
5.4.5 Analog Output in Batcher mode
The analog output is menu assignable to correspond to the Volume Rate,
Corrected Volume Rate, Mass Rate, Temperature, Density, Volume Total,
Corrected Volume Total or Mass Total. The analog output is ideal for "trend"
tracking using strip chart recorders or other devices.
17
FC-21 Flow Computer
RS-232 Serial Port
5.4.6 RS-232 Serial Port Operation in Batcher mode
(Batch mode)
The RS-232 serial port can be used for programming (using the Setup Disk)
or for communicating to printers and computers in the Operating Mode (Run
Mode).
PC Communications:
The Setup Disk also allows the user to query the unit for operating status such
as Flow Rate, Flow Total, Temperature, Density, Presets, etc.
Operation of RS-232 Serial Port with Printers:
Transaction Printing
For transaction printing, the user defines the items to be included in the
printed document (see section 6.3.20 SET DATA OUTPUT, Select_list). The
transaction document can be initiated by pressing the PRINT key, by a
remote contact closure or print at end of batch.
Data Logging
In data logging, the user defines the items to be included in each data log (see
section 6.3.20 SET PRINTER OUTPUT, Select_list). The user can also
select when (time of day) or how often (print interval) the data log is to be
made (see section 6.3.19 SET PRINTER OUTPUT, Configure).
System Setup and Maintenance Report
The system setup and maintenance report lists all of the instrument setup
parameters and usage for the current instrument configuration. The audit trail
information and a status report is also printed. This report is initiated in the
Test menu (see section 8.2.3 PRINT SYSTEM SETUP).
RS-485 Serial Port
(Batch mode)
5.4.7 RS-485 Serial Port (optional)
RS-485 Port Description:
The optional RS-485 card utilizes Modbus RTU protocol to access
a variety of process parameters and totalizers. Batches/Relays
can be controlled remotely via Modbus. In addition, action routines
can be executed. For further information, contact factory and
request RS-485 Protocol manual.
Operation of Serial Communication Port with PC
The flow computer's RS-485 channel supports a number of
Modbus RTU commands. Modbus RTU drivers are available
from third party sources for a variety of Man Machine Interface
software for IBM compatible PC's.
The user reads and writes information from/to the RS-485 using
the Modbus RTU commands. The FC-21 then responds to these
information and command requests.
Process variables and totalizers are read in register pairs in
floating point format. Time and date are read as a series of
integer register values. Alarms are individually read as coils.
Action routines are initiated by writing to coils.
18
FC-21 Flow Computer
6. PROGRAMMING
6.1 Front Panel Operation Concept for Program Mode
The FC-21 is fully programmable through the front panel. Please review
the following usage summary before attempting to use the instrument.
TOTAL
1
RATE
2
PRE 1
3
TEMP
4
PRINT
5
CLEAR
MENU
START
STOP
TIME
HELP
•
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
ENTER
0
–
Setup Mode:
MODE CHANGES
Pressing the MENU key will offer selections of RUN, SETUP, TEST.
RUN is the normal operating mode for the instrument. SETUP offers
various sub-menus used for instrument setup. TEST offers various
sub-menus for Test, Calibration and System Start-up.
How To Make Mode
Changes
How To Navigate
Through Sub-Menu
Groups
Submenu GROUP NAVIGATION
Use the UP and DOWN arrow keys to navigate up and down through
the Sub-Menu groups when in the SETUP or TEST mode. Press the
ENTER key to enter a desired setup or test Sub-Menu group.
How To Select
Program Choices
SELECTION OF ITEM
During setup, the unit will often offer multiple choices for a given topic.
The topic prompt appears on the top line of the display. The choices are
shown on the lower line of the display.
To select an item, press the key beneath the desired choice. The
selected choice will blink. Press the ENTER key to accept the
selected choice.
How To Enter
Numeric Values
NUMERIC ENTRY
The keys labeled "0 - 9", "–", ".", CLEAR and ENTER are used to enter
numerical values. A leading 0 will assume that you intend to enter a
minus "–" sign. Press the CLEAR key to clear the existing value and to
enable editing.
How To Enter
Text Characters
TEXT CHARACTER ENTRY
Some setup items (i.e. Descriptors, Units Label) require the user to
enter text characters. Press CLEAR to enable editing. The UP and
DOWN arrow keys are used to scroll through the available character
sets for each individual character. Press the ENTER key to accept the
character and advance to the next character.
19
FC-21 Flow Computer
6.2 EZ Setup
The EZ Setup routine is a quick and easy way to configure the unit for the most
commonly used instrument functions. This setup assumes that you are
measuring Volumetric Flow using a high level, DC Pulsing flow sensor. Entering
the EZ Setup mode automatically sets many features. This may cause any
previously programmed information to be lost or reset. For a complete
customized configuration, see sections 6.3 and 6.4.
Menus
Display
Notes
6.2.1
TOP LEVEL
SETUP MENU
SELECT OPERATE STATE Select Setup to enter the instrument
Run Setup Test setup routine.
ENTER
SELECT EZ SETUP
Press ENTER to begin EZ Setup
routine.
6.2.2
EZ Setup
Submenu
Groups
ENTER
ARE YOU SURE?
No
Confirm that you want to run EZ Setup.
Yes Caution: Any previous program
settings may be lost or reset.
ENTER
INSTRUMENT TYPE
Rate/Tot
Instrument Type.
Batch
ENTER
RATE TIME BASE
Sec Min Hour Day
Select the appropriate rate time base.
ENTER
RATE DEC PLACES
Enter the desired rate decimal location.
0 0-3 decimal places allowed.
ENTER
TOTAL VOLUME UNITS
Enter the desired totalizer units label.
gal
ENTER
TOTAL DEC PLACES
Enter the desired totalizer decimal
0 location. 0-3 decimal places allowed.
ENTER
K_FACTOR TYPE
Avg LinTbl UVC
Enter the desired K-Factor Type.
ENTER
AVERAGE KA-FACTOR
If Average selected, Enter the desired
####### P/gal Average K-Factor.
LINEAR TABLE KA
Fre01:######## Hz
If LinTbl or UVC selected,
Enter the desired frequency/ K-Factor
pair for each point in the Linearization
Table.
Enter a frequency of 0 for any point
other than Fre01 to exit Linearization
Table setup.
ENTER
LINEAR TABLE KA
KA--01:##########
ENTER
FS ANALOG OUT 20mA
Enter the desired full scale setting for
#######gal/m the analog output.
ENTER
RATE
TOTAL
00.0 gal/m Return to Run Mode
0 gal
20
FC-21 Flow Computer
6.3 Setup Menus
Display
Menus
Notes
6.3.1
Top Level Setup
Menu
SELECT OPERATE STATE
Run Setup Test
Select Setup to enter the instrument setup
routine.
MENU
ENTER
SELECT EZ SETUP
Refer to Page 20 for Details.
Refer to Page 22 for Details.
Refer to Pages 22 for Details.
Refer to Page 23 & 24 for Details.
Refer to Page 25, 26 & 27 for Details.
Refer to Pages 28 for Details.
Refer to Page 29 for Details.
Refer to Pages 29 for Details.
Refer to Page 30 for Details.
Refer to Page 30 & 31 for Details.
Refer to Page 32 for Details.
Refer to Page 33 for Details.
Refer to Page 34 for Details.
Refer to Pages 35 & 36 for Details.
Refer to Page 36 for Details.
Refer to Page 37 for Details.
START
6.3.2
Submenu
Groups
STOP
START
INSTRUMENT TYPE
STOP
START
SELECT FLOW EQUATION
STOP
START
SETUP INDICATORS
STOP
START
SETUP FLOW INPUT
STOP
START
SETUP AUX INPUT
STOP
START
SET FLUID PROPERTIES
STOP
START
SETUP PULSE OUTPUT
STOP
START
SETUP ANALOG OUTPUT
STOP
START
SETUP RELAYS
STOP
START
SETUP CONTROL INPUTS
STOP
START
SETUP REALTIME CLOCK
STOP
START
SERIAL USAGE
STOP
START
SETUP DATALOG/PRINT
STOP
START
ADMINISTRATIVE SETUP
STOP
START
STOP
SETUP NETWORK CARD
21
FC-21 Flow Computer
6.4 Setup Sub-Menus
Sub-menus
Display
Notes
6.4.1
Refer to page 20 for EZ Setup routine.
SELECT EZ SETUP
SELECT EZ SETUP
Press the DOWN (stop) key to advance to
Instrument Type. Press the UP (start) key to
advance to Administrative Setup.
STOP
START
Advance To
INSTRUMENT TYPE
6.4.2
Press ENTER to enter Instrument Type sub-
menus.
INSTRUMENT TYPE
INSTRUMENT TYPE
ENTER
Rate/Tot
Press ENTER when Rate/Total is flashing to
configure the instrument as a Ratemeter/
Totalizer.
INSTRUMENT TYPE
Rate/Tot
Batch
STOP
ENTER
START
If Rate/Tot selected, advance to Select Flow
Equation.
Advance To
SELECT FLOW EQUATION
Press ENTER to enter Instrument Type sub-
menus.
INSTRUMENT TYPE
ENTER
Batch
Press ENTER when Batch is flashing to
configure the instrument as a Batcher.
INSTRUMENT TYPE
Rate/Tot
Batch
STOP
ENTER
START
Select UP to Reset to 0 and count up to preset.
Select DOWN to reset to Preset and count
down to 0.
Down
BATCH COUNT MODE
Up
STOP
ENTER
START
Enter the maximum allowable Batch Preset.
The operator will not be able to enter a batch
preset larger than this value.
MAXIMUM BATCH PRESET
1000.0 gal
STOP
ENTER
START
Select ON to set the unit to operate using a
Batch Overrun Compensation routine.
Select OFF to inhibit Batch Overrun
BATCH OVERRUN COMP
Off
On
On
Compensation routine. (See Section 5.4)
STOP
ENTER
START
Select On to enable the Auto Batch Restart. This
will automatically restart the unit at the end of
each batch run. Select Off if this is not desirable.
AUTO BATCH RESTART
Off
STOP
ENTER
START
Enter Time Delay for Auto Batch Restart.
When a batch is completed, the next batch will
start after the amount of time entered here.
TIME DELAY (1-99sec)
10
ENTER
Enter a timeout of 0 to 99 seconds. If a batch is
“Filling” and zero flow persists for more than this
time, the batch will be aborted.
FLOW SIGNAL TIMEOUT
10
ENTER
Enter time (0-99 sec.) for Max. Drain Time. After batch
quantity is reached, “Batch Done” is declared when the
flow rate is “0” or the Maximum Drain Time has expired.
MAXIMUM DRAIN TIME
10
ENTER
Enter a quantity for a Slow Start up. RLY 2
(slow flow) will energize for Slow Start and RLY
1 (fast flow) will energize after the Slow Start
Quantity has been delivered.
SLOW START QUANTITY
10
ENTER
Advance To
SELECT FLOW EQUATION
22
FC-21 Flow Computer
Sub-menus
Notes
Display
6.4.3
SELECT
FLOW EQUATION
SELECT FLOW EQUATION
Press ENTER to enter Select Flow Equation
submenus.
ENTER
SELECT FLOW EQUATION
Volume Mass Cor/Vol
Press ENTER when desired flow equation is
flashing.
ENTER
Advance To
SETUP INDICATORS
(Total)
6.4.4
SETUP INDICATORS
Press ENTER to begin setup of the Indicators
SETUP
INDICATORS
(Total)
ENTER
SETUP INDICATORS
Total Dens Rate Temp
Press ENTER when Total is flashing to
configure the Totalizer Indicators
ENTER
TOTAL DESCRIPTOR
TOTAL
Enter the desired Total Descriptor
ENTER
TOTAL VOLUME UNITS
gal
Enter the desired Volume Units Label for the
Totalizer.
ENTER
TOTAL DEC PLACES
0
Select the desired Total Decimal Place.
0-3 decimal places allowed.
ENTER
Advance To
SETUP INDICATORS
(Density)
6.4.5
SETUP
INDICATORS
(Density)
SETUP INDICATORS
Total Dens Rate Temp
Press ENTER when Dens is flashing to
configure the Density Indicators.
ENTER
DENSITY DESCRIPTOR
DENS
Enter the desired Density Descriptor.
ENTER
DENSITY MASS UNITS
lbs
Enter the desired Mass Units Label for
Density.
ENTER
DENSITY DEC PLACES
0
Select the desired Density Decimal Place.
0-3 decimal places allowed.
ENTER
Advance To
SETUP INDICATORS
(Rate)
23
FC-21 Flow Computer
Sub-menus
Display
Notes
6.4.6
SETUP INDICATORS
Total Dens Rate Temp configure the Ratemeter Indicators
Press ENTER when Rate is flashing to
SETUP
INDICATORS
(Rate)
ENTER
RATE TIME BASE
Select the desired Rate Time Base.
Sec Min Hour Day
ENTER
RATE DESCRIPTOR
Enter the desired Descriptor for the
RATE Ratemeter.
ENTER
RATE DEC PLACES
Select the desired Rate Decimal Place.
0 0-3 decimal places allowed.
ENTER
RATE AVG FILTER
Enter desired Rate Averaging Filter.
0
ENTER
QUICK UPDATE %
Enter desired Percent of Change for Quick
5 Update. If the current flowrate deviates by an
amount greater than the percentage value
entered, the Rate Averaging is inhibited.
(See Page 57 for more details.)
ENTER
Advance To
SETUP INDICATORS
(Temperature)
6.4.7
SETUP
INDICATORS
(Temperature)
SETUP INDICATORS
Total Dens Rate Temp configure the Temperature Indicators.
Press ENTER when Temp is flashing to
ENTER
TEMP DESCRIPTOR
Enter the desired Temperature Descriptor.
Enter the desired Temperature Scale.
TEMP
ENTER
TEMPERATURE SCALE
Deg_C Deg_F
ENTER
TEMP DEC PLACES
Select the desired Temperature Decimal
0 Place. 0-3 decimal places allowed.
ENTER
Advance To
SETUP FLOW INPUT
24
FC-21 Flow Computer
Sub-menus
Display
Notes
6.4.8
SETUP
Press ENTER to begin setup of Flow Input.
SETUP FLOW INPUT
FLOW INPUT
(Pulse - Ain & PS
(A=B))
ENTER
Select the desired Excitation Voltage.
EXCITATION VOLTAGE
5v
12v
24v
ENTER
Press ENTER when Pulse is flashing to
configure the flow input for Pulse signals.
FLOW INPUT TYPE
Pulse Analog
ENTER
NOTE:
Enter the desired Pulse type. See side note.
Select the desired Input Pulse Trigger Level.
PULSE INPUT TYPE
Ain PS(A=B) Qx1 Qx2
Ain = Single Pulse
PS(A=B) = Pulse
Security
Qx1 = Quadrature
Qx2 = Quadrature x 2
ENTER
PULSE TRIGGER LEVEL
10mV 100mV 2.5V
ENTER
Select the desired Low Pass Filter.
(Max. Count Speed).
LOW PASS FILTER
40Hz 3KHz 20KHz
ENTER
Select the proper input termination.
INPUT TERMINATION
Pullup Pulldown None
ENTER
Enter the desired Maximum Sample Window
Time (1-99 sec).
MAX WINDOW (1-99)
1
ENTER
Enter the desired K-Factor Type.
K_FACTOR TYPE
Avg LinTbl UVC
ENTER
If Avg selected, Enter the desired Average K-
Factor.
AVERAGE KA-FACTOR
####### P/gal
If LinTbl selected,
LINEAR TABLE KA
Enter the desired frequency/ K-Factor pair for
each point in the Linearization Table.
NOTE: Enter 0 for Fre value of any point
(other than Fre01) to exit the routine
and use the values entered up to that
point.
Fre01:######## Hz
ENTER
LINEAR TABLE KA
KA--01:####### P/gal
ENTER
Enter the desired volumetric Low Rate Alarm.
This will trigger an alarm message if alarm
conditions occur. The relays are not affected.
LOW FLOW RATE ALARM
####### gal/m
ENTER
Enter the desired volumetric High Rate Alarm.
This will trigger an alarm message if alarm
conditions occur. The relays are not affected.
HIGH FLOW RATE ALARM
####### gal/m
ENTER
Advance To
SETUP AUX INPUTS
25
FC-21 Flow Computer
Submenus
Display
SETUP FLOW INPUT
Notes
6.4.9
SETUP
Press ENTER to begin setup of Flow Input.
FLOW INPUT
(Pulse - Quadrature,
Qx1 or Qx2)
ENTER
Select the desired Excitation Voltage.
EXCITATION VOLTAGE
5v
12v
24v
ENTER
Press ENTER when Pulse is flashing to
configure the flow input for Pulse signals.
FLOW INPUT TYPE
Pulse Analog
ENTER
NOTE:
Enter the desired Pulse type. See side note.
Select the desired Input Pulse Trigger Level.
PULSE INPUT TYPE
Ain PS(A=B) Qx1 Qx2
Ain = Single Pulse
PS(A=B) = Pulse
Security
Qx1 = Quadrature
Qx2 = Quadrature x 2
ENTER
PULSE TRIGGER LEVEL
10mV 100mV 2.5V
ENTER
Select the desired Low Pass Filter.
(Max. Count Speed).
LOW PASS FILTER
40Hz 3KHz 20KHz
ENTER
Select the proper input termination.
INPUT TERMINATION
Pullup Pulldown None
ENTER
Enter the desired Maximum Sample Window
Time (1-99 sec).
MAX WINDOW (1-99)
1
ENTER
Enter the desired K-Factor Type.
K_FACTOR TYPE
Avg LinTbl UVC
ENTER
If Avg selected, Enter the desired Average K-
Factor (KA for channel A).
AVERAGE KA-FACTOR
####### P/gal
Enter the desired Average K-Factor (KB for
channel B).
AVERAGE KB-FACTOR
####### P/gal
If LinTbl selected,
LINEAR TABLE KA
Enter the desired frequency/ K-Factor pair for
each point in the Linearization Table. (channel
A)
Fre01:######## Hz
ENTER
NOTE: Enter 0 for Fre value of any point
(other than Fre01) to exit the routine
and use the values entered up to that
point.
LINEAR TABLE KA
KA--01:####### P/gal
ENTER
Enter the desired frequency/ K-Factor pair for
each point in the Linearization Table. (channel
B)
LINEAR TABLE KB
Fre01:######## Hz
ENTER
NOTE: Enter 0 for Fre value of any point
(other than Fre01) to exit the routine
and use the values entered up to that
point.
LINEAR TABLE KB
KA--01:####### P/gal
ENTER
Enter the desired volumetric Low Rate Alarm.
This will trigger an alarm message if alarm
conditions occur. The relays are not affected.
LOW FLOW RATE ALARM
####### gal/m
ENTER
Enter the desired volumetric High Rate Alarm.
This will trigger an alarm message if alarm
conditions occur. The relays are not affected.
HIGH FLOW RATE ALARM
####### gal/m
ENTER
Advance To
SETUP AUX INPUTS
26
FC-21 Flow Computer
Sub-menus
Display
Notes
6.4.10
SETUP
FLOW INPUT
(Analog)
SETUP FLOW INPUTS
Press ENTER to begin setup of the Flow
Input.
ENTER
EXCITATION VOLTAGE
Select the desired Excitation Voltage.
5v
12v
24v
ENTER
FLOW INPUT TYPE
Pulse Analog
Press ENTER when Analog is flashing to
configure the flow input for Analog signals .
ENTER
ANALOG SIGNAL TYPE
Voltage Current
Choose Analog Signal Type.
ENTER
ANALOG VOLTAGE RANGE If Voltage selected,
0-10V 0-5V 1-5V Choose desired Voltage Range.
ANALOG CURRENT RANGE If Current selected,
4-20mA
0-20mA Choose desired Current Range.
ENTER
LINEARIZATION TYPE
Linear Sqrt LinTbl
Select the desired Linearization Type.
If LinTbl selected,
ENTER
LINEAR TABLE KA
APR01:######## gal/m Enter the desired Apparent Input Flow (APR) /
Correction Factor (CFr) pair for each point in
ENTER
the Linearization Table.
LINEAR TABLE KA
CFr01:########
NOTE: Enter 0 for APR value of any point
(other than APR01) to exit the routine
and use the values entered up to that
point.
ENTER
FLOW LOW SCALE
Enter the low flowrate corresponding to the
####### gal/m low analog signal.
ENTER
FLOW FULL SCALE
Enter the High flowrate corresponding to the
####### gal/m High analog signal.
ENTER
LOW FLOW CUTOFF
Enter the desired Low Flow Cutoff.
####### gal/m
ENTER
LOW FLOW RATE ALARM
Enter the desired volumetric Low Rate Alarm.
####### gal/m This will trigger an alarm message if alarm
conditions occur. The relays are not affected.
ENTER
HIGH FLOW RATE ALARM Enter the desired volumetric High Rate Alarm.
####### gal/m This will trigger an alarm message if alarm
conditions occur. The relays are not affected.
ENTER
Advance To
SETUP AUX INPUT
27
FC-21 Flow Computer
Sub-menus
Display
Notes
6.4.11
SETUP AUX INPUT
SETUP AUX INPUT
Press ENTER to begin setup of the Auxiliary
Input.
ENTER
AUX INPUT TYPE
None Dens Temp for Temperature inputs.
Select Temperature to set the Auxiliary Input
NOTE:
When Density (Dens)
is selected, The menu
prompts will be very
similar to the Tem-
perature prompts.
The menus will
prompt the user for
density values and
density units.
ENTER
AUX SIGNAL TYPE
Voltage Current RTD Advance to "Aux Default", if RTD selected.
Choose Temperature Signal Type.
ENTER
INPUT SIGNAL RANGE
If Voltage selected,
0-10V 0-5V 1-5V Choose desired Voltage Range. Skip if RTD.
INPUT SIGNAL RANGE
If Current selected,
4-20mA
0-20mA Choose desired Current Range. Skip if RTD.
ENTER
AUX LOW SCALE
Enter the low temperature scale
###### F corresponding to the low temperature signal.
Skip if RTD.
ENTER
AUX FULL SCALE
Enter the high temperature scale
###### F corresponding to the high temperature signal.
Skip if RTD.
ENTER
AUX DEFAULT
Enter the Default Temperature.
###### F The unit will use this value if the temperature
input fails.
ENTER
AUX LOW ALARM
Enter the Low setpoint for the Temperature
Enter the High setpoint for the Temperature
Choose the Density Extraction method to be
###### F Alarm.
ENTER
AUX HIGH ALARM
###### F Alarm.
ENTER
DENS EXTRACT METHOD
Therm_Coef API_2540 used.
ENTER
Advance To
SET FLUID PROPERTIES
28
FC-21 Flow Computer
Sub-menus
Display
Notes
6.4.12
SET FLUID
PROPERTIES
SET FLUID PROPERTIES Press ENTER at this prompt to Set Fluid
Properties.
ENTER
Enter the Reference Density. This is used in
REF. DENSITY
the calculation of density when you have a
###### lbs/g temp transmitter and used for corrected flow
calculation if you have a density transmitter.
ENTER
REF. TEMPERATURE
###### F
Enter the Reference Temperature.
ENTER
Enter the proper Expansion Factor.
EXPAN. FACTOR [xe-6] (If Temp Compensated for Mass or Corrected
######## Volume) See Section 7.4, Calculating the
Expansion Factor.
ENTER
CALIBRATION DENSITY Enter the Calibration Density. This is used in
######## calculation of flow for analog inputs using SQRT.
ENTER
VISCOSITY COEF. A
0.000
Enter the Viscosity A Coefficient. See section
7.5, Computation of Viscosity Coef. A and B.
ENTER
VISCOSITY COEF. B
0.000
Enter the Viscosity B Coefficient. See section
7.5, Computation of Viscosity Coef. A and B.
ENTER
BASE DENSITY H2O@4C Enter the Base Density H2O@4C. This is
###### lbs/g used in the centistoke calculation for UVC.
ENTER
Advance To
SETUP PULSE OUTPUT
6.4.13
SETUP
PULSE OUTPUT
SETUP PULSE OUTPUT
Press ENTER at this prompt to setup the
Pulse Output.
ENTER
PULSE OUTPUT USAGE
Off Vol CVol/Mass
Select the desired Pulse Output Usage.
Select the desired Pulse Width for the Pulse
Enter the desired Pulse Value for the Pulse
ENTER
PULSE WIDTH
10mS
100mS Output.
ENTER
PULSE VALUE
####### gal/P Output (Units per Pulse).
ENTER
Advance To
SETUP ANALOG OUTPUT
29
FC-21 Flow Computer
Sub-menus
Display
SETUP ANALOG OUTPUT
ENTER
Notes
6.4.14
SETUP
ANALOG OUTPUT
Press ENTER when Analog is flashing to
setup the Analog Output.
ANALOG OUTPUT USAGE
Rate Total Temp Dens
Select the desired Analog Output Usage.
ENTER
ANALOG OUT FLOW TYPE Only if Rate selected & Flow EQ. = Mass, Cor/Vol
CVol/Mass Select the desired Analog Output Flow.
Vol
ENTER
ANALOG OUTPUT RANGE
4-20mA
Select the desired current range for the Analog
0-20mA Output.
ENTER
LS ANALOG OUTPUT
Enter desired Analog Output Low Scale Value.
####### gal/m NOTE: Units label will correspond with output
usage type selected.
ENTER
FS ANALOG OUT 20mA
Enter desired Analog Output Full Scale Value.
####### gal/m
ENTER
ANALOG OUT DAMPING
0.0
Enter the desired Analog Output Damping
Constant.
ENTER
Advance To
SETUP RELAYS
6.4.15
SETUP RELAYS
(Relay 1 & Relay 2)
SETUP RELAYS
Rly1 Rly2 Rly3 Rly4
Select the desired Relay for setup.
(Relays 3 & 4 Optional)
ENTER
NOTE:
If Relay 1 or Relay 2 Selected,
Select Rate, Total or NA.
RELAY 1 USAGE
RATE TOTAL NA
In Batch mode,
Relay 1 is reserved
for Preset,
ENTER
Relay 2 is reserved
for Prewarn.
If Rate selected, enter desired relay activation
delay value.
RELAY 1 DELAY sec
0
ENTER
Select the desired Relay Activation.
Low: Relay activates when reading is below
setpoint.
RELAY 1 MODE
LO_ALARM HI_ALARM
High:Relay activates when reading is above
setpoint.
ENTER
If Total Selected, Enter desired Relay
Duration.
RELAY 1 DURATION
#####
ENTER
Enter the desired Setpoint. The Setpoint can
be edited in run mode using the PRE 1 key
(PRE 2 key for Relay 2).
RELAY 1 SETPOINT
####### gal
ENTER
If Rate, selected, Enter desired Relay
Hysteresis.
RELAY 1 HYSTERESIS
##### gal/m
ENTER
Advance To
SETUP RELAYS 3, 4
30
FC-21 Flow Computer
Sub-menus
Display
Notes
Select the desired Relay for setup.
6.4.15 (Continued)
SETUP RELAYS
(Relay 3 & Relay 4)
SETUP RELAYS
Rly1 Rly2 Rly3 Rly4 (Relays 3 & 4 Optional)
ENTER
NOTE:
RELAY 3 USAGE
If Relay 3 Selected,
Rate Tot Aux Ovrn NA Choose Rate, Total, Aux, Ovrn or NA.
Settings for Relays
3 & 4 may be
entered even if
relays are not
supplied. The
settings will still
trigger display
alarms.
RELAY 4 USAGE
If Relay 4 Selected,
Rate Tot Aux Alrm NA Choose Rate, Total, Aux, Alrm or NA.
ENTER
RELAY 3 DELAY sec If Rate / Aux selected, enter desired relay
0
activation delay value.
ENTER
Select the desired Relay Activation for Rate/Aux.
Low: Relay activates when reading is below
setpoint.
RELAY 3 MODE
LO_ALARM HI_ALARM
High:Relay activates when reading is above
setpoint.
ENTER
RELAY 3 DURATION
If Total Selected, Enter desired Relay
##### Duration.
ENTER
RELAY 3 SETPOINT
Enter the desired Setpoint.
####### gal
ENTER
RELAY 3 HYSTERESIS
If Rate, selected, Enter desired Relay
##### gal/m Hysteresis.
ENTER
Advance To
SETUP CONTROL INPUTS
RELAY NOTES & CONSIDERATIONS
1. Relay activation is based on the computed readings not the displayed value. Therefore the display damping
factor will not affect the relay response time. The RELAY N DELAY feature allows the user to enter a time
delay for relay activation. This feature is very useful in applications where short over/under range conditions
are not considered alarm conditions. The Relay is a delay on make and delay on break. Alarm condition must
be continuously present for a time greater than the entered RELAY N DELAY in order for alarm to activate.
Once alarmed, the alarm condition must be continuously absent for a time greater than the entered RELAY N
DELAY in order for the alarm condition to be reset.
2. When INSTRUMENT TYPE is set to batcher, Relay 1 is reserved for PRESET and Relay 2 is reserved for
PREWARN.
3. Setting the relays to NA (Not Assigned), will allow the relay activation to be controlled via the RS-232 Serial
and/or RS-485 Modbus ports.
4. Relay 3 and Relay 4 settings may be used to trigger display alarm conditions even if the relays are not
supplied.
5. Relay 4 Alarm Operation. When Relay 4 is set for Alarm (Alrm) the relay functions as follows: The relay will
energize when it is NOT in an alarm condition. It is therefore recommended to use the Normally Closed
(N.C.) relay contacts on Relay 4 when wiring for alarm conditions. The Alarm Relay functions in this manner
to ensure that the alarm output will signal on power loss or blown fuse. Other alarm conditions include:
PULSEOUT OVERFLOW
SOFTWARE ERROR RESET
EXTENDED PFI LOCKUP
RTD/ THERM FAILURE
31
FC-21 Flow Computer
Sub-menus
Display
Notes
6.4.16
SETUP CONTROL
INPUTS
SETUP CONTROL INPUTS Press Enter to begin setup of the Control
Inputs.
ENTER
(RATE/TOTAL)
SETUP CONTROL INPUTS Select the desired Control Input for setup.
Input1 Input2 Input3
ENTER
CONTROL INPUT1 USAGE If Control Input 1 Selected,
INHIBIT_TOTAL NA
Select Inhibit Total or NA (Not Assigned).
CONTROL INPUT2 USAGE If Control Input 2 Selected,
Select Reset Total or NA (Not Assigned).
RESET_TOTAL
NA
CONTROL INPUT3 USAGE If Control Input 3 Selected,
Prn Ack KeyLk NA
Select Prn (Print), Ack (acknowledge), KeyLk
(Keylock) or NA (Not Assigned). ACK will
acknowledge and clear alarms and warning
messages.
ENTER
Advance To
SETUP REALTIME CLOCK Note: Alarms may reassert themselves if
alarm conditions are still present.
6.4.17
SETUP CONTROL
INPUTS
SETUP CONTROL INPUTS Select the desired Control Input for setup.
Input1 Input2 Input3
ENTER
(BATCH)
CONTROL INPUT1 USAGE If Control Input 1 Selected,
Start Rst/Start NA
Select Start ,Reset/Start, NA (Not Assigned).
CONTROL INPUT2 USAGE If Control Input 2 Selected,
Stop Stop/Rst NA
Select Stop, Stop/Reset, NA (Not Assigned).
CONTROL INPUT3 USAGE If Control Input 3 Selected,
Rst Prn KeyLk Ack NA Select Prn (Print), Ack (acknowledge), KeyLk
(Keylock) or NA (Not Assigned). ACK will
ENTER
acknowledge and clear alarms and warning
Advance To
messages.
SETUP REALTIME CLOCK Note: Alarms may reassert themselves if
alarm conditions are still present.
32
FC-21 Flow Computer
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
33
FC-21 Flow Computer
Sub-menus
Display
Notes
6.4.20
SERIAL USAGE
SERIAL USAGE
Press Enter to begin setup of the Serial Port.
ENTER
SERIAL HARDWARE
RS232
Select Serial Hardware type for standard port.
RS485 (See SETUP NETWORK CARD for RS485
Modbus option)
ENTER
DEVICE ID
Select the Device ID.
##
ENTER
BAUD RATE
Select the desired Baud Rate.
300 600 1200 <more>
BAUD RATE
2400 4800 9600 19200
(If <more> selected)
Select the desired Parity.
Set the Handshake.
ENTER
PARITY
None Odd
Even
ENTER
HANDSHAKING
None Softwre Hardwre
ENTER
Choose end of line termination. Only choose
<CR> if your external device automatically
DEVICE LINE FEED
<CR>
<CR+LF> assigns a line feed for every <CR> carriage
return.
ENTER
MODEM OPTIONS
No
Select "Yes" if the serial port will be used to
control a modem.
Yes
ENTER
MODEM INIT MASTER
No Yes
Select "Yes" to have the unit engage in a
configuration conversation with the modem on
power up .
ENTER
MODEM AUTO ANSWER
No Yes
Select the desired Modem Auto Answer mode.
ENTER
CALL OUT PHONE #
Enter the Call Out Phone Number to be dialed
0 for "Call Out Time" or "Print On Error/Alarm".
ENTER
CALL OUT TIME
Enter the time of day to perform Call Out
##:##:## transmission.
ENTER
Continued on Next Page
34
FC-21 Flow Computer
Sub-menus
Display
Notes
6.4.20
SERIAL USAGE
(continued)
Select "Yes" to have the unit perform a Call
Out transmission upon error/alarm condition.
CALL ON ERROR/ALARM
No
Yes
ENTER
Enter the number of redials to be performed
on call out time if busy or no answer. (error/
alarm tries until connected)
NUMBER OF REDIALS
0
ENTER
Select "Yes" to perform hangup if there is
inactivity for more than 2 minutes.
HANGUP IF 2MIN INACT
No Yes
ENTER
Advance To
SETUP DATALOG/PRINT
6.4.21
SETUP
DATALOG/PRINT
(Configure)
Press Enter to setup the Datalog/Print
information.
SETUP DATALOG/PRINT
ENTER
Select Config to configure the Datalog/Print
information.
SETUP DATALOG/PRINT
Config Select_list
ENTER
Select the type of Output Format.
OUTPUT FORMAT
Printer Term Dbase
ENTER
Enter the desired Page Length.
If Printer selected above.
PAGE LENGTH [66 max]
66
ENTER
Enter the desired Top Margin.
If Printer selected above.
TOP MARGIN [60 max]
3
ENTER
Select Yes to record events to the datalogger
only. Events will not be sent to the serial port.
DATALOG PRINT ONLY
No
Yes
ENTER
Enter Print Time, printer will print at this time
every day. Enter 00:00:00 to inhibit print time.
PRINT TIME HH:MM:SS
00:00:00
ENTER
Enter Print Interval,
Enter 00:00:00 to inhibit print interval..
PRINT INTERVAL
00:00:00
ENTER
Select YES to enable Print Key.
Select NO to disable Print Key
ENABLE PRINT KEY
NO
YES
ENTER
Batch mode only.
Select Yes to print at end of batch.
PRINT END OF BATCH
NO YES
ENTER
Advance To
SETUP DATALOG/PRINT
(Select_list)
35
FC-21 Flow Computer
Sub-menus
Display
Notes
6.4.22
SETUP
DATALOG/PRINT
(Select_list)
SET DATALOG/PRINT
Press enter to begin Setup Datalog/Print
routine.
ENTER
SET DATALOG/PRINT
Press enter when Select_list is selected to
Config Select_list setup print list.
PRINT LIST ITEMS
TOTAL
Use Up and Down arrow keys to view list
YES status.
Press the Corresponding function key to the
items that you wish to add or remove from the
YES list.
STOP
PRINT LIST ITEMS
RATE
START
Items marked with Yes will be added to the
list,
YES items marked with No will be removed from
List Items:
TOTAL
RATE
PRINT LIST ITEMS
PRE 1
PRE1
TEMP
the list.
ENTER
GRAND
PRE2
DENS
PRINT LIST ITEMS
DataLog size =001489 shows the current possible Datalog size.
The Select Print List Information display
TIME
ENTER
Advance To
ADMINISTRATIVE SETUP
6.4.23
ADMINISTRATIVE
SETUP
ADMINISTRATIVE SETUP Press Enter to begin Administrative Setup.
ENTER
OPERATOR PASSWORD
*****
Enter Operator Password. (Factory Set to 0)
Enter Supervisor Password.
ENTER
SUPERVISOR PASSWORD
***** (Factory Set to 2000)
ENTER
SOFTWARE VERSION
This display is used to show the software
vxx.xx version of the installed software.
ENTER
PRODUCT ORDER CODE
FC-21xxxxxxx
This display is used to show the product order
code (model number).
ENTER
UNIT SERIAL NUMBER
00000
This display is used to show the unit's serial
number.
ENTER
SENSOR SERIAL NUMBER This display is used to show the sensor's
00000
serial number.
ENTER
Advance To
SETUP NETWORK CARD
36
FC-21 Flow Computer
6.4.24
SETUP
SETUP NETWORK CARD
Press Enter to setup Network Card
NETWORK CARD
(optional)
ENTER
SELECT NTW PROTOCOL
ModbusRTU
Select desired Network Protocol.
ENTER
NETWORK DEVICE ID
Enter the device address on network (00-
1 255).
ENTER
BAUD RATE
2400 4800 9600 19200
Select the desired Baud Rate.
Select the desired Parity.
ENTER
PARITY
None Odd
Even
ENTER
Advance To
SELECT EZ SETUP?
37
FC-21 Flow Computer
7. Principle Of Operation
General
7.1 General:
Operation
The FC-21 Flow Computer uses several internal calculations to compute the
compensated flow based on specific data input. Several computations are performed
to arrive at the uncompensated flow, temperature, density and viscosity. This information
is then used to compute the Corrected Volume Flow or Mass Flow.
Orifice Flowmeter 7.2 Orifice Flowmeter Considerations:
Considerations
Head class flowmeters are supplied by the manufacturers with a 4-20 mA output span
which is already in flow units. The FC-21 permits the user to enter this flowmeter
information directly. However, closely associated with this information is the density
that was assumed during flowmeter calibration. This information must also be input if
the user is to obtain maximum accuracy.
It is assumed that the user has the printout from a standardized orifice sizing program
for the particular device he will be using. Such standardized printouts list all the
necessary information which the user will then be prompted for.
Several specialized flow equations are listed that are not intended for the standard
unit but to be offered to appropriate OEMs or as special order items. These are
designated by a “†”.
Note concerning Fluid Information
The user will be prompted for Fluid Information during the setup of the instrument.
The Factory will be preparing application information for several common fluid types.
Flow Equations
7.3 Flow Equations:
Input Flow Computation:
Linear or External SQRT
Input Flow = [% input span * (flow FS - flow low scale)]+ flow low scale
Orifice
Input Flow = [(√% input span) * ( flow FS - flow low scale)] + flow low scale
Input Flow Computation:
General Case
Tf= [% input span * (temp FS - Temp low scale)] + temp low scale
RTD Case
Tf = f(measured input resistance)
Input Density Computation:
Temperature Transmitter
density = reference density * (1 - Therm.Exp.Coef. * (Tf-Tref))2
Density Transmitter
density = [% input span * (density FS - density low scale)] + density low scale
38
FC-21 Flow Computer
7.3 Flow Equations: (Continued)
Flow Equations
Input Viscosity Computation:
B
A exp
(
)
(Deg F + 459.67)
† centistokes =
Absolute Density
Where: centistokes = cP/(kg/l)
Uncompensated Flow Computation:
Pulse Input; Average K-Factor
input frequency * time scale factor
Volume Flow =
K-Factor
Pulse Input; Linear Table
input frequency * time scale factor
Volume Flow =
K-Factor (Hz)
Pulse Input; UVC
input frequency * time scale factor
K-Factor (Hz/cstk)
†
Volume Flow =
Analog Input; Linear
Volume Flow = input flow
Analog Input; Linear Table
Volume Flow = input flow * correction factor (input flow)
Analog Input; Orifice or External SQRT
√(calibrated density)
Volume Flow = input flow *
√(density)
Analog Input; Orifice Linear Table or External SQRT Linear Table
√(calibrated density)
†
Volume Flow = CF(rn) * input flow *
√(density)
Corrected Volume Flow Computation:
Temperature Transmitter
Standard Volume Flow = volume flow * (1 - Therm.Exp.Coef. *(Tf-Tref))2
Density Transmitter
density
Standard Volume Flow = volume flow *
reference density
Mass Flow Computation:
Mass Flow = volume flow * density
† These special flow equations are not available in the standard unit. They are to be
offered to OEMs or as special order items.
39
FC-21 Flow Computer
7.3 Flow Equations: (Continued)
Flow Equations
The above information was obtained from "Flow Measurement Engineering Handbook, 3rd
Edition" by Richard W Miller.
40
FC-21 Flow Computer
7.4 Calculating the Expansion Factor
The liquid density is a function of the flowing temperature for many fluids. This unit
solves an equation which represents this physical property of the fluid.
The information which the unit uses to describe the fluid is entered by the user in
the following variables: Reference Temperature, Reference Density, Expansion
Factor.
Calculating
Expansion Factor
This information is available for many fluids in one or more of the following forms:
Fluid Specific Gravity vs. Temp. Table
Specific Gravity vs. Temp. Graph
Fluid Density vs. Temp. Table
Fluid Density vs. Temp. Graph
Begin by obtaining one of the fluid properties for the fluid you are using from
available manufacturers information or Engineering Handbooks. In some cases this
information is listed on the Material Safety Data Sheet for the fluid.
Two temperature-specific gravity pairs will be required to compute the temperature
coefficient.
The reference temperature is simply chosen by the user. Common reference
temperatures are 60° F or 15° C.
However, for cryogenic fluids, the normal boiling point may also be used. In some
cases the fluid data may list properties at 100° F, this temperature may also be used
as the reference temperature.
The reference temperature should be chosen so that it is in the application
temperature range. i.e. application temperature range -10 to 120° F, reference
temperature of 60° F chosen.
Enter the reference temperature you have chosen at this point.
The reference specific gravity corresponds to the fluid SPECIFIC GRAVITY at the
reference temperature chosen.
You may convert the fluid density information to specific gravity if it is in units other
than specific gravity. Use EQ1.
Expansion Factor
Equations
EQ1.
Spec.Grav. = Density of Fluid / Density of Water
Given the reference temperature, reference specific gravity, a second temp. and a
second Spec.Grav., the Expansion Factor (C Factor) can be computed as follows:
EQ2. Used for Liquid Mass and Corrected Volume Equations
1 - (Spec.Grav.2 / Ref.Spec.Grav.)
√
C =
x 1,000,000
[
]
Temp.2 - Ref.Temp
Given the reference temperature, reference density, a second temp. and a second
density, the Expansion Factor (C Factor) can be computed as follows:
EQ3. Used for Liquid Mass and Corrected Volume Equations
√
1 - (Dens.2 / Ref.Dens.)
C =
x 1,000,000
[
]
Temp.2 - Ref.Temp
41
FC-21 Flow Computer
7.5 Computation of Viscosity Coef. A and B
Computation of
Viscosity
Coef. A & B
The flow computer solves an equation which computes the viscosity as a
function of temperature. Two parameters must be entered for this
calculation to be performed. These are the setup parameters Viscosity
Coef. A and Viscosity Coef. B.
Alternately, if your intended fluid is not listed, the Viscosity Coef. A and B
can be derived from two known temperature/viscosity pairs. Begin by
obtaining this information for you intended fluid. Convert these known
points to units of Degrees F and centipoise (cP)
The information is now in a suitable form to compute the Viscosity Coef. A
and Viscosity Coef. B using the following equation based on the fluid state.
For a liquid, A and B are computed as follows:
(T1 + 459.67) • (T2 + 459.67) • ln [ cP1/cP2]
B =
A =
——————————————————————
(T2 + 459.67) - (T1 + 459.67)
cP1
———————————
exp [ B / ( T1 + 459.67) ]
cP • Density of Water at 4°C
——————————————
Density of Liquid
NOTE: cS =
42
FC-21 Flow Computer
7.6 Linearization Table
Linearization
Table
General
7.6.1 Linearization Table General Information
The Linearization Table is used when the flow input device gives a nonlinear
input signal. The unit uses up to 16 different points, as entered by the
operator, to form a curve for linearizing the input signal.
Information
Notes:
1) A minimum of three points must be set up.
2) If "0" is entered for the frequency of any point other than point 1, the Flow
Computer assumes there are no more points above the points that preceded
them. The display will advance to the next setup prompt. Extrapolation is
taken from the last two nonzero points.
3) If the input frequency is above the highest or below the lowest frequency
programmed, the unit will use the last known point for the K factor in
computing the resulting actual flow.
4) Frequencies or apparent flows should be entered in ascending order.
Linearization
Table
(Pulse Inputs)
7.6.2 Linearization Table for Pulse Inputs
The linearization table for pulse inputs programming is quite simple when
values of frequency and flow are known. The Flow Computer asks for 16
different frequencies (Freq) and 16 corresponding K factors (K). It then uses
this data to determine what the actual flow is for any given input frequency.
Usually the necessary data is provided with the flowmeter.
Linearization
Table
(Analog Inputs)
7.6.3 Linearization Table for Analog Inputs
The Linearization Table for Analog inputs programming is similar to the Pulse
input setup. The Flow Computer asks for 16 different flow rates (apparent
flow) and 16 corresponding Correction Factors. It then uses this data to
determine what the Actual flow is for any given apparent input signal. Again, a
minimum of three points must be set up.
Correction factor =
Actual Flow
Apparent Input Flow
The same rules that applied for the Digital setup apply for the Analog setup as
well.
The Flow Computer prompts you for the Apparent input signal (APR) and a
correction factor CFr) to multiply it by to yield true actual flow.
Linearization
Table
Interpolation
7.6.4 Linearization Table Interpolation
The Linearization Table routine uses the entered data to determine the K
factor for any given input frequency or input flow signal. This is done by taking
the closest data points above and below the input signal, then using those
points to extrapolate the K factor (correction factor), then calculating the
uncompensated flow from the data. Below are the formulas.
Parameters:
Determine closest point above input signal
signal = X,
K factor (correction factor) = KA
KA
KN
KB
Determine closest point below input signal
signal = Y, K factor (correction factor) = KB
Let input signal = H,
unknown K factor (correction factor) = KN
Y H X
Input
To find KN use this formula:
H - Y
x (KA - KB) + KB = KN
X - Y
43
FC-21 Flow Computer
8. Test, Service and Maintenance
8.1 Test Menus
Display
Menus
Notes
Select Test to enter the instrument
test & calibration routine.
NOTE: Supervisor (Service) password
required to gain access to this mode.
8.1.1
TOP LEVEL
TEST MENUS
SELECT OPERATE STATE
Run Setup Test
ENTER
Audit Trail
Refer to Page 40 for Details.
Refer to Page 40 for Details.
Refer to Page 40 for Details.
Refer to Page 41 Details.
START
STOP
START
Error history
STOP
START
Print System Setup
STOP
START
Keypad Test
STOP
START
Display test
Refer to Page 41 for Details.
Refer to Pages 42 - 46 for Details.
Refer to Page 46 Details.
STOP
START
Calibrate
STOP
START
Analog In Test
STOP
START
Pulse input test
Refer to Page 47 for Details.
Refer to Page 47 for Details.
Refer to Page 47 for Details.
Refer to Page 48 for Details.
Refer to Page 48 for Details.
Refer to Page 48 for Details.
Refer to Page 49 for Details.
Refer to Page 49 for Details.
STOP
START
Analog out test
STOP
START
Excitation out test
STOP
START
Pulse out test
STOP
START
Relay Test
STOP
START
Control inputs test
STOP
START
Battery Voltage Test
STOP
START
STOP
Data logger utility
44
FC-21 Flow Computer
8.2 Test Sub-Menus
Sub-menus
Display
Notes
8.2.1
Audit Trail
Audit Trail
Press Enter to view the audit trail information.
Submenu Group
ENTER
The audit trail is viewed in this format:
nnnnn= number of critical menu changes,
hh:mm:ss; mm/dd/yy = time and date of last
change.
Audit Trail nnnnn
hh:mm:ss mm/dd/yy
MENU
Audit Trail
Press Menu to get back to audit trail top-level
menu.
8.2.2
Error History
Submenu Group
Error history
Press Enter to view error history.
NOTE: Press Print Key to print Error History. Printout
will include time/date of each errors first occurrence.
ENTER
Error history
Flow rate alarm low
Press Up/Down arrow keys to scroll through
error message history. Press CLEAR to clear
entire error log.
MENU
Error history
Press Menu to get back to error history
top=level menu.
8.2.3
Print System Setup
Press enter key to enter print system setup
submenu
Print System Setup
Submenu Group
ENTER
Print System Setup
Press ENTER to print
Press enter to begin printing the system
setup.
ENTER
Print System Setup
—— Printing ——-
This message will display as the data
transmission takes place.
MENU
Print System Setup
Press Menu to get back to print system setup
top-level menu.
45
FC-21 Flow Computer
Sub-menus
Display
Notes
8.2.4
Keypad test
Submenu Group
Keypad test
Press Enter to enter keypad test
ENTER
Press the various keys and the display will
show the key that was pressed. Press Menu
to exit the test
Keypad test
Key pressed—> ENTER
MENU
Keypad test
Press Menu to get back to Keypad test top-
level menu.
Display test
8.2.5
Display test
Submenu Group
Press Enter to enter display test.
ENTER
Upon pressing enter the each digit on the
display will scroll 0-9 then A-Z. Press menu to
exit the test.
00000000000000000000
00000000000000000000
MENU
Display test
Press Menu to get back to Display test top-
level menu.
46
FC-21 Flow Computer
ALL UNITS ARE CALIBRATED AT THE FACTORY PRIOR TO SHIPMENT
CAUTION:
This unit must be calibrated using precision and calibrated equipment.
Equipment needed is as follows: Frequency Generator, Digital Multimeter,
Precision Current/Voltage Source, Oscilloscope, Frequency Counter.
Sub-menus
Display
Notes
Calibration
Submenu Group
Calibrate
Press Enter to begin the calibration routine.
(Please note the caution above)
ENTER
Calibrate ch1 0mA Connect Current Source (+) TB1-3, (-) TB1-4.
Iin=TB1-3 GND=TB1-4 Input 0mA and press Enter.
8.2.6
Calibrate CH1 0mA
Submenu Group
ENTER
This message is displayed during calibration.
Calibrate ch1 0mA
CALIBRATING ——
This message is displayed when the 0mA
calibration is finished.
Calibrate ch1 0mA
*** DONE ***
The display will automatically return to the
Calibrate CH1 0mA submenu. Press the
Down arrow key to advance to the CH1 20mA
calibration.
Calibrate ch1 0mA
Iin=TB1-3 GND=TB1-4
STOP
8.2.7
Connect Current Source (+) TB1-3, (-) TB1-4.
Input 20mA and press Enter.
Calibrate ch1 20mA
Iin=TB1-3 GND=TB1-4
Calibrate CH1 20mA
Submenu Group
ENTER
This message is displayed during calibration.
Calibrate ch1 20mA
0 CALIBRATING ——
This message is displayed when the 20mA
calibration is finished.
Calibrate ch1 20mA
*** DONE ***
The display will automatically return to the
Calibrate CH1 20mA submenu. Press the
Down arrow key to advance to the CH2 0mA
calibration.
Calibrate ch1 20mA
Iin=TB1-3 GND=TB1-4
STOP
Advance to
Calibrate ch2 0mA
47
FC-21 Flow Computer
Sub-menus
Display
Notes
8.2.8
Calibrate ch2 0mA To Calibrate: Connect Current Source (+)
Iin=TB1-8 GND=TB1-4 TB1-8, (-) TB1-4. Input 0mA and press Enter.
Calibrate CH2 0mA
Submenu Group
ENTER
Calibrate ch2 0mA This message is displayed during calibration.
0 CALIBRATING ——
Calibrate ch2 0mA This message is displayed when the 0mA
*** DONE ***
calibration is finished.
The display will automatically return to the
Calibrate ch2 0mA Calibrate CH2 0mA submenu. Press the
Iin=TB1-8 GND=TB1-4 Down arrow key to advance to the CH2 20mA
calibration.
STOP
Calibrate ch2 20mA To Calibrate: Connect Current Source (+)
Iin=TB1-8 GND=TB1-4 TB1-8, (-) TB1-4. Input 20mA and press
8.2.9
Calibrate CH2 20mA
Submenu Group
Enter.
ENTER
Calibrate ch2 20mA This message is displayed during calibration.
0 CALIBRATING ——
Calibrate ch2 20mA This message is displayed when the 20mA
*** DONE ***
calibration is finished.
Calibrate ch2 20mA The display will automatically return to the
Iin=TB1-8 GND=TB1-4 Calibrate CH2 20mA submenu. Press the
Down arrow key to advance to the CH1 0V
STOP
calibration.
Advance to
Calibrate ch1 0V
48
FC-21 Flow Computer
Sub-menus
Display
Notes
8.2.10
Calibrate CH1 0V
Submenu Group
To Calibrate: Connect Voltage Source (+)
TB1-2, (-) TB1-4. Input 0V and press Enter.
Calibrate ch1 0V
Vin=TB1-2 GND=TB1-4
ENTER
This message is displayed during calibration.
Calibrate ch1 0V
0 CALIBRATING ——
This message is displayed when the 0V
calibration is finished.
Calibrate ch1 0V
*** DONE ***
The display will automatically return to the
Calibrate CH1 0V submenu. Press the Down
arrow key to advance to the CH1 10V
calibration.
Calibrate ch1 0V
Iin=TB1-2 GND=TB1-4
STOP
8.2.11
Calibrate CH1 10V
Submenu Group
To Calibrate: Connect Voltage Source (+)
TB1-2, (-) TB1-4. Input 10V and press Enter.
Calibrate ch1 10V
Iin=TB1-2 GND=TB1-4
ENTER
This message is displayed during calibration.
Calibrate ch1 10V
0 CALIBRATING ——
This message is displayed when the 10V
calibration is finished.
Calibrate ch1 10V
*** DONE ***
The display will automatically return to the
Calibrate CH1 10V submenu. Press the
Down arrow key to advance to the CH2 0V
calibration.
Calibrate ch1 10V
Iin=TB1-2 GND=TB1-4
STOP
Advance to
Calibrate ch2 0V
49
FC-21 Flow Computer
Sub-menus
Display
Notes
8.2.12
Calibrate CH2 0V
Submenu Group
Calibrate ch2 0V
Vin=TB1-5 GND=TB1-4
To Calibrate: Connect Voltage Source (+)
TB1-5, (-) TB1-4. Input 0V and press Enter.
ENTER
Calibrate ch2 0V
0 CALIBRATING ——
This message is displayed during calibration.
Calibrate ch2 0V
*** DONE ***
This message is displayed when the 0V
calibration is finished.
The display will automatically return to the
Calibrate CH2 0V top-level menu. Press the
Down arrow key to advance to the CH2 10V
calibration.
Calibrate ch2 0V
Iin=TB1-5 GND=TB1-4
STOP
Calibrate ch2 10V
Iin=TB1-5 GND=TB1-4
To Calibrate: Connect Voltage Source (+)
TB1-5, (-) TB1-4. Input 10V and press Enter.
8.2.13
Calibrate CH2 10V
Submenu Group
ENTER
Calibrate ch2 10V
0 CALIBRATING ——
This message is displayed during calibration.
Calibrate ch2 10V
*** DONE ***
This message is displayed when the 10V
calibration is finished.
The display will automatically return to the
Calibrate CH2 10V top-level menu. Press the
Down arrow key to advance to the 100 ohm
RTD calibration.
Calibrate ch2 10V
Iin=TB1-5 GND=TB1-4
STOP
Advance to
Calibrate 100ohm RTD
Calibrate 100ohm RTD
JMP TB1-6,7 100R=7,8
To Calibrate: Connect a jumper wire between
TB1-6 and TB1-7, Place a 100 ohm 0.1%
resistor between TB1-7 and TB1-8. Press
enter to calibrate.
8.2.14
Calibrate 100 ohm
RTD
ENTER
Submenu Group
Calibrate 100ohm RTD
0 CALIBRATING ——
This message is displayed during calibration.
Calibrate 100ohm RTD
*** DONE ***
This message is displayed when the RTD
calibration is finished.
Calibrate 100ohm RTD
JMP TB1-6,7 100R=7,8
The display will automatically return to the
Calibrate 100 ohm RTD top-level menu.
Press the Down arrow key to advance to the
4mA out calibration.
STOP
Advance to
Calibrate 4mA out
50
FC-21 Flow Computer
Sub-menus
Display
Notes
Connect ammeter to (+) TB1-15, (-) TB1-16.
8.2.15
Calibrate 4mA Out
Submenu Group
Calibrate 0mA out
+ TB1-15 - TB1-16 Press enter.
ENTER
To trim 0mA output: Press CLEAR to enable
Calibrate 0mA out
Enter mA: 0.00000
editing and enter a small negative number (i.e. -
0.100) to force a display reading, then clear and
enter small quantity measured on your meter.
ENTER
Calibrate 0mA out
The display will return to Calibrate 0mA out.
+ TB1-15 - TB1-16 Press the down arrow key to advance to Cal.
20mA out or repeat above if necessary.
STOP
8.2.16
Calibrate 20mA Out
Submenu Group
Calibrate 20mA out
+ TB1-15 - TB1-16 Press enter.
Connect ammeter to (+) TB1-15, (-) TB1-16.
ENTER
Calibrate 20mA out
Enter mA: 20.00000
To trim 20mA output: Press CLEAR to enable
editing and enter the current reading that is on
the ammeter display. Press enter.
ENTER
Calibrate 20mA out
The display will automatically return to the
+ TB1-15 - TB1-16 Calibrate 20mA out submenu. Calibration is
complete.
MENU
Calibrate Press the Menu key to go back to Calibrate
top-level menu.
8.2.17
Analog In Test
Submenu Group
Analog In Test
Press enter to test the analog inputs.
ENTER
To check voltage input accuracy: Use TB1-4
Analog In Test Volts as Reference Ground, input 0-10 Volts to TB1-
T2:00.000 T5:00.000 2 and/or TB1-5. Display should show voltage
STOP
being input. Use voltage meter to verify input.
To check current input accuracy: Use TB1-4
Analog In Test mA as Reference Ground, input 0-20mA to TB1-3
T3:00.000 T8:00.000 and/or TB1-8. Display should show current
STOP
being input. Use ammeter to verify input.
To check RTD input accuracy: Connect a
Analog In Test OHMS jumper wire between TB1-6 and TB1-7, Place
RTD
00.000 a 100 ohm 0.1% resistor between TB1-7 and
TB1-8. Display should show 100 ohms ±0.1%.
MENU
Analog In Test
Press Menu key to return to Analog In Test
top-level menu.
51
FC-21 Flow Computer
Sub-menus
Display
Notes
8.2.18
Pulse input test
Submenu Group
Pulse input test
Press Enter key to test the pulse input.
ENTER
2.5V
10mV
100mV
START
Pulse input test
Trigger level 2.5V
Use the Up/Down arrow keys to select the
appropriate trigger level.
STOP
ENTER
40Hz
3KHz
20kHz
START
Pulse input test
count speed
Use the Up/Down arrow keys to select the
3kHz appropriate frequency range.
STOP
ENTER
To check Pulse input accuracy: Use TB1-4 as
reference ground, input a frequency on TB1-2.
Pulse input test
F1:
0 F2:
0
The display should show frequency being
input. Use a frequency counter to verify input.
MENU
Pulse input test
Analog out test
Press Menu key to return to Pulse input test
top-level menu.
8.2.19
Analog out test
Submenu Group
Press Enter to test the analog output.
To simulate analog output: Connect an
ammeter to (+) TB1-15, (-) TB1-16. Press the
key under the desired setting to move the
ENTER
Analog out test
*0 4 10 15 20 mA asterisk (*). The unit should output the
selected current.
MENU
Analog out test
Press Menu key to return to Analog out test
top-level menu.
Excitation out test
Press Enter to test the excitation output.
8.2.20
Excitation out test
Submenu Group
To test the excitation output: Connect a
voltmeter to (+) TB1-1, (-) TB1-4. Press the
key under the desired setting to move the
ENTER
Excitation out test
*5v
12v
24v asterisk (*). The unit should output the
selected voltage.
MENU
Excitation out test
Press Menu key to return to Excitation out test
top-level menu.
52
FC-21 Flow Computer
Sub-menus
Display
Notes
8.2.21
Pulse out test
Press Enter key to test the pulse output.
Pulse out test
Submenu Group
To simulate a frequency on the pulse output:
Connect a frequency counter to (+)TB1-13,
(-)TB1-14. Press the key under the desired
setting to move the asterisk (*). The unit
should output the selected frequency.
ENTER
Pulse out test
*0Hz 1Hz 10Hz 20Hz
MENU
Press Menu key to return to Pulse out test
top-level menu.
Pulse out test
8.2.22
Relay test
Submenu Group
Press Enter to test the relays.
Relay Test
ENTER
To manually control the relay outputs: Press
the key under the desired relay to toggle the
relays On/Off. Use an ohmmeter to check the
relay contacts.
Rly1 Rly2 Rly3 Rly4
Off Off Off Off
MENU
Press Menu key to return to Relay Test top-
level menu.
Relay Test
8.2.23
Control input test
Submenu Group
Press Enter to test the control inputs.
Control inputs test
ENTER
To check the control inputs: Use TB1-12 as
reference, input a DC signal to TB1-9, TB1-10
and/or TB1-11, The Display will show ON
when input is active, OFF when inactive.
TB1-9 TB1-10 TB1-11
Off Off Off
MENU
Press Menu key to return to control input test
top-level menu.
Control inputs test
53
FC-21 Flow Computer
Sub-menus
Display
Notes
8.2.24
Battery Voltage
test
Battery Voltage Test Press Enter key to view the battery voltage.
ENTER
Submenu Group
Battery Voltage Test The display will show the battery voltage.
3.312 Volts
Replace battery at 2.5 VDC or below.
MENU
Battery Voltage Test Press Menu key to return to battery voltage test
top-level menu.
8.2.25
Data logger utility
Submenu Group
Data logger utility
Press Enter to use data logger utility.
ENTER
Data logger utility
The displays shows the number of Data Logs.
Press the Down arrow key to advance to PRT
(print) or CLR (clear).
Log 10
958 Max
STOP
Data logger utility
Press PRINT key to output data logger logs to
Log 00001 PRT CLR printer, Press CLEAR key to clear the data
logger contents.
MENU
Data logger utility
Press Menu key to return to Data logger utility
top-level menu.
54
FC-21 Flow Computer
8.3 Internal Fuse Replacement
Instructions:
1. Make sure you follow proper E.S.D. Precautions. All persons performing this
replacement must follow proper grounding procedures.
2. Turn the power to the unit off.
3. Disconnect the two piece connector rear terminal block, leaving all connections in place.
4. Remove the unit from the panel.
5. Remove the four machine screws (see fig. 1) which hold the two sections of the case
together.
6. The rear section of the case should detach from the rest of the case. It may be
necessary two cut the wiring label along the joint where the two sections connect. With
the rear section of the case removed the fuse will be exposed (located near the rear
terminal, AC connection).
7. Locate the Fuse F1 (see fig. 2) and unplug the fuse from its socket.
8. Insert the new fuse into the socket. Insure that the pins are fully inserted and straight.
9. Reassemble the case and install the four machine screws which join the two sections of
the case.
10.Reinstall the unit into the panel.
11. Reconnect the rear terminal block.
12.Turn the unit back on.
Fuse Specifications:
110 VAC Power:
220 VAC Power:
160mA/250V, TD Wickman 19372-030-k or equivalent
80mA/250V, TD Wickman 19372-026-k or equivalent
12/24 VDC Power: 800mA/250V, TD Wickman 19374-046-k or equivalent
fig. 1
fig. 2
Screws
(4 places)
fuse
FUSE
55
FC-21 Flow Computer
9. RS-232 Serial Port
9.1 RS-232 Port Description:
The FC-21 has a general purpose RS-232 Port which may be used for any one of the following
purposes:
Transaction Printing
Data Logging
Remote Metering by Modem (optional)
Computer Communication Link
Configuration by Computer
Print System Setup
Print Calibration/Malfunction History
9.2 Instrument Setup by PC’s over Serial Port
A Diskette program is provided with the FC-21 that enables the user to rapidly configure the FC-21
using a Personal Computer. Included on the diskette are common instrument applications which may
be used as a starting point for your application. This permits the user to have an excellent starting point
and helps speed the user through the instrument setup.
9.3 Operation of Serial Communication Port with Printers
FC-21’s RS-232 channel supports a number of operating modes. One of these modes is intended to
support operation with a printer in metering applications requiring transaction printing, data logging
and/or printing of calibration and maintenance reports.
For transaction printing, the user defines the items to be included in the printed document. The user
can also select what initiates the transaction print generated as part of the setup of the instrument. The
transaction document may be initiated via a front panel key depression, a remote contact closure, or
upon completion of a batch.
In data logging, the user defines the items to be included in each data log as a print list. The user can
also select when or how often he wishes a data log to be made. This is done during the setup of the
instrument as either a time of day or as a time interval between logging.
The system setup and maintenance report list all the instrument setup parameters and usage for the
current instrument configuration. In addition, the Audit trail information is presented as well as a status
report listing any observed malfunctions which have not been corrected.
The user initiates the printing of this report at a designated point in the menu by pressing the print key
on the front panel.
The user may specify a “next calibration date” for periodic maintenance. The unit will automatically
remind the user that calibration is scheduled during instrument power up and in some printed documents
after that date.
9.4 FC-21 RS-232 Port Pinout
5 4 3 2 1
RS-232
RS-485
9 8 7 6
5
4
3
2
1
5
4
3
2
1
9
8
7
6
9
8
7
6
23 24
10 11 12 13 14 15 16 17 18 19 20 21 22
1 Handshake Line
2 Transmit
1
2
3
4
5
6
7
8
9
3 Receive
4 Do Not Use
5 Ground
6 Do Not Use
7 Do Not Use
8 Do Not Use
9 Do Not Use
56
FC-21 Flow Computer
10. RS-485 Serial Port (optional)
10.1 RS-485 Port Description:
The FC-21 has a an optional general purpose RS-485 Port which may be used for
any one of the following purposes:
Accessing Process Parameters
Rate, Temperatures, Density, Setpoints, Month, Day, Year, Hour,
Minutes, Seconds, etc.
Accessing System Alarms
System, Process, Self Test, Service Test Errors
Accessing Totalizers
Totalizer and Grand Totalizer
Executing Various Action Routines
Reset Alarms, Reset Totalizers, Print Transaction, Reset Error History,
Start, Stop, Clear
10.2 General
The optional RS-485 card utilizes Modbus RTU protocol to access a variety of pro-
cess parameters and totalizers. In addition, action routines can be executed. For
further information, contact factory and request RS-485 Protocol manual for FC-21.
10.3 Operation of Serial Communication Port with PC
The flow computer's RS-485 channel supports a number of Modbus RTU com-
mands. Refer to port pinout (below) for wiring details. Modbus RTU drivers are
available from third party sources for a variety of Man Machine Interface software for
IBM compatible PC's.
The user reads and writes information from/to the RS-485 using the Modbus RTU
commands. The FC-21 then responds to these information and command requests.
Process variables and totalizers are read in register pairs in floating point format.
Time and date are read as a series of integer register values. Alarms are individually
read as coils. Action routines are initiated by writing to coils.
10.4 FC-21 RS-485 Port Pinout
1 Ground
2 Ground
3 Ground
5 4 3 2 1
RS-232
RS-485
5
4
3
2
1
5
4
3
2
1
4 TX/RX (+)
9
8
7
6
9
8
7
6
9 8 7 6
5 TX/RX (-)
23 24
10 11 12 13 14 15 16 17 18 19 20 21 22
1
2
3
4
5
6
7
8
9
6 Do Not Use
7 Terminating Resistor (180 Ω)
8 TX/RX (+)
9 TX/RX (-)
57
FC-21 Flow Computer
11. Flow Computer Setup Software
The FC-21 setup program provides for configuring, monitoring and controlling a FC-
21 unit.
Sample applications are stored in disk files. The setup program calls these
Templates. You can store the setup from the program’s memory to either the FC-21
(Downloading the file) or to a disk file (Saving the file) for later usage. Similarly you
can load the setup in program memory from either a disk file (Opening a file) or from
the FC-21 unit (Uploading a file).
The program can monitor outputs from the unit while it is running.
The program can reset alarms and totalizers.
For assistance there are mini-helps at the bottom of each screen in the program.
There is also context sensitive help available for each screen accessible by pressing
the F1 key.
11.1 System Requirements:
IBM PC or compatible with 386 or higher class microprocessor
4 MB RAM
3 MB free disk space
VGA or higher color monitor at 640 x 480
Microsoft® Windows™ 3.1 or 3.11 or Windows 95™
Communication Port - RS-232
RS-232 Cable
11.2 Cable and Wiring Requirements:
The serial communication port on your PC is either a 25 pin or 9 pin connector. No
cabling is supplied with the setup software. A cable must be purchased separately or
made by the user. It is recommended to purchase a modem cable which matches
the available communication port on you PC and a 9 pin male connection for the FC-
21 serial port.
11.3 Installation for Windows™ 3.1 or 3.11
The Setup Software includes an installation program which copies the software to
your hard drive.
Insert Setup Disk 1 in a floppy drive.
In the Program Manager, click File, and then select Run.
NOTE: For Windows 95™ Click the Start button, select Run and proceed
as follows:
Type the floppy drive letter followed by a colon (:) and a backslash (\), and the word
setup. For Example:
a:\setup
Follow the instructions on your screen.
58
FC-21 Flow Computer
11.4 Using the Flow Computer Setup Software
The setup software window consists of several menu “Tabs”. Each tab is organized
into groups containing various configuration and/or monitoring functions. To view
the tab windows, simply click on the tab. The previous tab window will be hidden as
the new tab window is brought to the foreground.
11.5 File Tab
The File Tab has three sections. Any of the options on this tab can also be
accessed from the File submenu.
The Template Section provides for opening and saving templates. The Save and
Save As buttons provide the standard Windows functionality for dealing with files.
The Load button is used to open existing templates.
There are two additional menu items available only from the File menu: Create new
file and Templates.
The Create new file, option allows for creating custom templates using the existing
template in memory as the starting point. Assign a new name for this template. The
template will be saved under this new name.
The Template option will bring up a list of predefined templates that can be loaded
into the program. These predefined templates are useful as a starting point when
defining custom templates.
A typical scenario using the setup program would be the following:
• Open up a predefined template from the supplied list
• Choose ‘Save As’ to save this to a new file name
• Proceed to customize the template by making any changes that are needed
• Save the template to disk (if you want to reuse this template)
• Download the template to an attached unit.
The Communications with FC-21 Section allows the user to upload a template file
from the unit, download the program’s current template to the unit or Compare the
program’s current template with the unit.
The Print (report) Section allows the user to:
1. Configure the current Windows printer through the Select Printer option.
2. Print a Maintenance Report through the PC's printer using the Print
Maintenance option.
3. Print the current template through the PC's printer using Print Setup option.
11.6 Setup Tab
The Setup tab is where majority of the FC-21 instrument setup modifications are
done. The Setup tab is divided into five sections.
System Section: Parameters, Display, Indicators
Input Section:
Flow, Fluid, Compensations, Control Inputs
Output Section: Pulse, Currents
Relay Section:
Relays
Other Settings Section: Administration, Communication, Printing
NOTE: Many setup items are enabled or disabled depending on previous setup
selections, It is important to work your way through the above list in the
order shown. Be sure to verify your selections when you are through
programming to insure that no settings were changed automatically.
59
FC-21 Flow Computer
11.7 View Tab
The View Tab screen allows for viewing selected group items on the PC in a similar
format as shown on the unit display. Data from the following groups can be viewed
in the List of Values section:
Process Parameters (i.e. rate, temperature)
Totalizers (i.e. total, grand total)
The setup software assumes the current setup has been uploaded from the flow
computer into the PC. It is important that the setup program and the FC-21 unit are
using the same setup information at all times or the data will be inconsistent. It is
best to upload or download the setup before using this feature.
To start the viewer, first check the boxes of items to view and then click the start
button. The data will appear in the appropriate sections and will be continuously
updated. The refresh rate is dependent on the number of items that are being
viewed and the baud rate of the connection. Data in the List of Values section can
be collapsed by clicking on the ‘minus’ sign in front of the group title. The data can
be expanded by clicking on the ‘plus’ sign in front of the group title. If a group is
collapsed and data in the group changes on refresh, the group will automatically
expand. Changing the view items requires stopping the current viewing, checking
the new selections and then restarting the viewer.
If communication errors occur while reading data from the FC-21 device, the word
‘Error’ will appear in place of the actual value. If the connection to the FC-21 is lost,
the viewer will time out with a message saying the device is not responding.
The viewer will attempt to communicate with the FC-21 device matching the device
ID set in the communications screen. If you are having trouble establishing
communication, compare settings for the PC and the flow computer. Also verify the
connections between the PC and flow computer.
11.8 Misc. Tab
This tab has three sections: Tools, Actions and Options.
The tools section contains various system administration activities such as creating/
modifying the initial sign-on screen or calibration, service test etc.
Create Sign-on, Create Print Header, Calibration, Service Test
The Actions section is used to send commands to the FC-21 unit.
Reset Totalizers, Reset Alarms
The Options section has the following selections:
Linearization, PC Communication
Additional capabilities may be provided in the future.
NOTE: Future options appear as disabled buttons on the screen.
60
FC-21 Flow Computer
12. Glossary Of Terms
Acknowledge & Clear Alarms
Acknowledge is used to clear alarm relays and remove any visual alarm messages from the display. In
the run mode, press the ENTER key or activate CONTROL INPUT 3 (if set for ACK) to momentarily
clear alarms and alarm messages. Alarms will reassert themselves if alarm conditions are still present.
Analog Output
The analog signal (4-20mA) that is generated by the FC-21. It can correspond to the Rate, Total,
Temperature or Density. This output is used primarily for transmission of process information to remote
systems.
Audit Trail
The audit trail is used to track the number of changes made to the units setup program.
Auto Batch Restart
The Auto Batch Restart function allows the user to set an amount of time to automatically restart a batch
after the completion of a batch. This time can be set from 1 to 99 seconds.
Batch Count Mode
Batch Count Mode specifies the user preference for count direction. The "Up" selection begins with a
value of "0" and counts up until the batch size is reached. The "Down" selection begins with a value
equal to the desired batch size and counts down to "0".
Batch Overrun
The FC-21 offers a batch overrun compensation routine. If batch overrun occurs due to slow valve
response time, the unit will compensate for the overrun amount on the next batch. This feature can be
disabled if desired.
Batcher
An instrument which controls the dispensing of desired batch amounts. Liquid batching systems are
usually comprised of a batch controller (batcher), flowmeter and control valve. The batcher opens and
closes the valve through the use of relays and measures the amounts of liquid being dispensed via the
flowmeter.
Baud Rate
The speed of serial communication transmissions, expressed in bits per second.
C-Factor (Fluid Expansion Factor)
A parameter in a flow equation which is used to describe the relationship between density or volume and
temperature changes.
Corrected Volume Flow
The equivalently volume at a reference temperature condition which involves the measurement of liquid
volume flow using a flow sensor and temperature sensor to compensate for thermal expansion.
Custody Transfer
Weights and Measure metering codes often specify several requirements for instruments and
mechanisms to prevent and track changes in the setup of an instrument which may be used in the
commercial sale of goods. The FC-21 tracks changes via the Audit Trail.
Data Logger
The capturing of information for later use and the mechanism for specifying the conditions where a
capture should be made.
DC Output / Excitation Voltage
An on-board DC power supply used to power peripheral sensors. The FC-21 offers excitation voltages
of 5VDC, 12VDC or 24VDC when powered by AC voltage.
Default Value
The value to be used by the instrument if a sensor failure or out of ranch signal is detected.
Expansion Factor
See C-Factor
Flow Alarm
A visual indication that the volumetric flowrate is above or below the flow alarm setpoint specified by
the user.
61
FC-21 Flow Computer
12. Glossary Of Terms (Continued)
Flow Signal Timeout
The Flow Signal Timeout allows the user to enter a timeout of 0 to 99 seconds. If a batch is “Filling” and
zero flow persists for more than the user entered time then the batch will be aborted. This prevents over
flows due to faulty flow sensors and/or wiring.
Flow Equation
A flow control expression or algorithm describing a mathematical equation to be solved by a flow
computer in the desired application.
Follow, Alarm
Alarm relays which are non latching and whose output state is based solely on the comparison of the
current process value and the alarm setpoint (trip point).
Function Key
A key on a push-button panel or keyboard (whose function is described by the key label) used to
perform an instrument function or special routine.
Handshake
A means of controlling the information flow between two pieces of equipment to prevent the sending
device from transmitting information at a rate faster than what can be accepted by the receiver.
Hysteresis
The relay hysteresis is a "dead band" setting which allows the relay to remain energized for a given
amount below the setpoint. This is used to prevent relay chatter when the process value is near the
setpoint value.
Example: If the Preset is set at 100, and the hysteresis is set at 10, the relay will energize when the rate,
temp or dens. reaches 100, the relay will remain energized until the reading falls below 90.
Input Termination
Input signal lines on digital inputs often require pullup or pulldown resistor configurations to operate
properly with different sensor configurations. The FC-21 contains such resistors and may be enabled via
the setup menu.
Inhibit Totalizer
"Inhibit Total" is a Control Input 1 setting that is used to stop the totalization. If enabled, a voltage level
on control input 1 will inhibit the total as long as the voltage is present. This feature is useful during
meter proving and in applications that provide a sensor to signal the flow computer when fluid is
present.
K-Factor
A scaling factor derived from the pulses produced by a flowmeter output, expressed in pulses per unit
(i.e. pulses/gallon)
LCD
Abbreviation for: Liquid Crystal Display
Limit Setpoint
An alarm trip point setting which specifies the value or magnitude of a process parameter necessary to
activate an alarm indicator or control relay.
Linear Flowmeter
A flow measurement device whose output is proportional to flow.
Linearization
The mathematical correction of a nonlinear device. The FC-21 uses a linearization Table which is made
up of input/output values and makes interpolations of the table to arrive at a "linearized" measurement.
LinTbl
Abbreviation for Linearization Table.
Low Flow Cutoff
A value set at which any flow measurements read below this value will be ignored.
Low Pass Filter
A low pass filter passes low input frequencies while blocking high frequencies. In the FC-21, this is the
maximum input count speed to be encountered in an application. It is expressed in counts per second
(Hz).
Mass Flow
62
FC-21 Flow Computer
12. Glossary Of Terms (Continued)
Mass Flow is inferred by the volumetric flow and density (or implied density) of a fluid.
Maximum Batch Preset
The Maximum Batch Preset allows the user to program the Maximum Batch value allowed to be entered
by the operator. If an operator should try to program a batch higher then this value, the unit will not allow
the value to be entered and will prompt the user with an error message saying that the Maximum Batch
Preset has been exceeded.
Maximum Drain Time
The unit declares that a batch is “done” when the flow rate equals “0”. A flow rate may be present long
after the Preset Relay de-energizes due to slow reacting valves or leaky valves. The Maximum Drain
Time allows the user to enter an amount of time (0 to 99 seconds) to wait before declaring “Batch Done”.
After the Preset Batch quantity is reached, the unit will declare “Batch Done” when the flow rate is “0” or
the Maximum Drain Time has expired. The batch data will then be available for printing and datalogging.
Max Window
The max. window time sets the maximum sample time (1 to 99 sec) for the ratemeter.
Modem Init Master
The "Modem Init Master" menu allows the user to select whether the unit will engage in a configuration
conversation with the modem on power up or impart no setup information to the modem and use it "as
is". For most users it is recommended to choose "yes" for "Modem Init Master".
Orifice Plate Flowmeter
A class of flow measurement devices where the measured signal (differential pressure) has a square law
relationship to flow.
Parity
A method for detecting errors in transmissions of serial communications data.
Preset
A set point used to trigger the relay outputs of the FC-21.
Print Interval
The print interval allows the FC-21 to transmit information to the serial port at selectable time intervals.
Private Code
An operator password code which authorizes changes to the setup of the instrument but blocks access to
the Service/Calibration/Test mode. The private code also blocks the clearing of the Grand Total.
Process Parameters
Any sensor information which has been scaled to engineering units including Flow, Temperature and
Density.
Pulldown (Input Termination)
The termination of an input at which the input is pulled down to ground through a resistor. Inputs that
are terminated by this method need to be driven high with a positive voltage pulse.
Pullup (Input Termination)
The termination of an input at which the input is pulled up to a positive voltage through a resistor.
Inputs that are terminated by this method need to be pulled low with a sinking current or contact to
ground .
Pulse Output
The pulse output of the FC-21 is available for remote accumulation of the total or sent to peripheral
devices, such as a PLC. The output can be scaled using the Pulse Output Scaling Constant.
Quad
Abbreviation for Quadrature. Quadrature signals are used for direction control. Two flowmeter signals
are output with a 90° phase shift. The counter counts UP when channel A precedes channel B, and
counts DOWN when Channel A lags Channel B.
Quick Setup
A utility that provides for rapid configuration of an instrument. The FC-21 quick setup provides the
63
FC-21 Flow Computer
12. Glossary Of Terms (Continued)
following:
1) Prompts the user for only critical information.
2) Automatically sets specifications to common uses.
After following the Quick Setup procedure, the unit will be operational to perform the basic
measurement. The setup can be further customized using the setup menus.
Quick Update %
This feature is used to disable the rate averaging filter when a significant change in the flow rate occurs.
The user can enter the percent of change needed to be detected to disable the averaging feature. This is
especially useful during start-up and shutdown of flow.
Rate Averaging Filter
The rate averaging filter is used to stabilize fluctuating rate displays. Higher settings provide more
averaging for a more stable display. Derived from the equation:
(OLD DATA x "Avg. Filter" + NEW DATA)
("Avg. Filter" + 1)
Ratemeter
Any device used to display the speed of a process. The ratemeter in the FC-21 displays flow rate.
Ref. Dens.
Abbreviation for Reference Density. This is the fluid density at reference temperature.
Ref. Temp.
Abbreviation for Reference Temperature. This represents the base or reference condition to which
corrected flow will be computed.
Reset/Start Control Input
In a batching system, a single operator activation of the START key or Control Input 1 will reset the
total then start the batch process.
Single_Pulse
The Single_Pulse setting is used for flowmeters with single pulse outputs.
Slow Start Quantity
The Slow Start Quantity is a function that allows an amount to be entered for a Slow Start up. This
function requires two stage valve control. RLY 1 (slow flow) will energize for Slow Start and RLY 2 (fast
flow) will energize after the Slow Start Quantity has been delivered. This helps reduce turbulence when
filling an empty container.
Sqrt
Abbreviation for Square Root Extraction. Used for flow elements using differential pressure
measurements.
Stop/Reset Control Input
In a batching system, a single operator activation of the STOP key or Control Input 2 will stop the batch
process then reset the total.
Time Constant
A damping factor for an averaging filter for the analog output. (see also Rate Averaging Filter)
Totalizer
Any device which accumulates and displays a total count.
UVC
Abbreviation for Universal Viscosity Curve. A presentation of the combined flowrate/viscosity
calibration for a turbine flowmeter.
VFD
Abbreviation for Vacuum Fluorescent Display
Visc Coef
Abbreviation for Viscosity Coefficient. One or more coefficients in an equation used to describe the
viscosity as a function of temperature for a fluid.
Volume Flow
The measurement of volumetric flow.
64
FC-21 Flow Computer
13. Diagnosis and Troubleshooting
13.1 Response of FC-21 on Error or Alarm:
Error and warning indications which occur during operation are indicated
in the RUN mode alternately with the measured values. The FC-21
Flow Computer has three types of error:
TYPE OF ERROR
DESCRIPTION
Sensor/Process Alarms
Errors detected due to sensor
failure or process alarm
conditions
Self Test Errors
System Alarms
Errors detected during self test.
Errors detected due to system
failure
Some alarms are self clearing. Other alarms require the user to
acknowledge and clear the alarm. Press the ENTER button to
acknowledged and clear alarms. Alarms may reassert themselves if
the alarm condition is still present.
NOTE: A historical error alarm log is available in the "Test Mode".
The following descriptions suggest possible causes and corrective
actions for each alarm message.
65
FC-21 Flow Computer
13.2 Diagnosis Flow Chart and Troubleshooting
All instruments undergo various stages of quality control during pro-
duction. The last of these stages is a complete calibration carried out
on state-of-the-art calibration rigs.
A summary of possible causes is given below to help you identify
faults.
Is there an input power
supply voltage across
Terminals 23 and 24?
Check the connections
according to the circuit
diagrams.
No
Yes
Check junction box fuses.
Is the Display Backlight
Visible?
Check/Replace internal
fuse. If fuse is OK,
Factory Service Required.
No
No
Yes
The display may not be
visible with ambient
temperatures below -10 °C
Allow the instrument to
warm up.
Are the Display
Characters Visible?
Yes
Contact factory if
necessary
Check line voltage.
If voltage is OK,
Factory Service Required.
Is there a black bar
across the display?
Yes
No
Does the display
alternate between blank
and sign on message?
Check line voltage.
If voltage is OK,
Factory Service Required.
Yes
Yes
No
Does the display show
an error message?
See section 12.3 for
cause and remedy.
No
No system or process
errors present.
66
FC-21 Flow Computer
13.3 Error & Warning Messages:
13.3.1
Error/Warning Message
Cause
Remedy
Sensor/Process Alarms
TOTALIZER ROLLOVER
AUX INPUT TOO LOW
Displayed when totalizer
rolls over
Acknowledge
Rollover,
Remedy not required
4-20 mA Input current at aux • Check wiring
input smaller than 3.5 mA:
• Faulty Wiring
• Check function of
sensor
• Transmitter not set to "4-20
mA"
• Transmitter defective
RTD OUT OF RANGE
Input current at RTD input
too low:
• Faulty wiring
• Check wiring
• Check function of
RTD sensor
• RTD defective
RATE OVERFLOW ERROR Pulse counter overflowed.
• Report error to
factory
The totalizer may have lost
counts.
• Check application
conditions
• Check wiring
PULSE OUT OVERFLOW
Calculated pulse frequency
too large:
• Adjust pulse value
• Adjust pulse width
• Pulse width setting too long • Check process
• Larger pulse scaler needed
conditions
FLOW RATE ALARM LOW Limit value exceeded.
FLOW RATE ALARM HIGH
• Check application if
necessary
• Check limit value
• Adjust the limit
value if required
TEMP ALARM LOW
TEMP ALARM HIGH
DENSITY ALARM LOW
DENSITY ALARM HIGH
BATCH OVERRUN ALARM Batch size exceeded by
• Check valves in
system for proper
operation and/or
leaks
more than set limit.
• Check limit value
• Adjust the limit
value if required
MODEM NOT PRESENT
The setup expects modem
usage and a modem is not
responding.
• Check setup for
proper baud rate,
parity, etc.
• Check modem
connection and
cycle power to
SUPERtrol
• Replace modem
SOFTWARE ERROR RESET The setup expects modem
usage and a modem is not
• Check setup for
proper baud rate,
parity, etc.
responding.
• Check modem
connection and
cycle power to
SUPERtrol
• Replace modem
EXTENDED PFI LOCKUP
Unit was operated with an
input power level lower than
safe operating range for an
extended period of time.
• Check data in unit.
Totalizer may have
inaccuracies
• Investigate
brownout cause.
67
FC-21 Flow Computer
13.3 Error & Warning Messages: (Continued)
13.3.2
Self Test Alarms
Error/Warning Message
FLOW INPUT TOO HIGH
Cause
Remedy
Analog input signal of the
flow input exceeded by more
than 3%:
• Sensor overranged
• Incorrect full scale setting
of flowmeter
• Check analog
signal range
• Check the
application
conditions
• Check wiring
• Function error in
transmitter or faulty wiring
AUX INPUT TOO HIGH
Analog input signal of the
auxiliary input exceeded by
more than 3%:
• Sensor overranged
• Incorrect full scale setting
of transmitter
• Check analog
signal range
• Check the
application
conditions
• Check wiring
• Function error in
transmitter or faulty wiring
FLOW INPUT TOO LOW
Analog input signal of the
flow input fell below the low
scale range by more than
3% of full scale value:
• Flowmeter not set to 4-20
mA
• Check wiring
• Check calibration of
flowmeter
• Check function of
flowmeter
• Function error in
transmitter or faulty wiring
BATTERY LOW WARNING Battery voltage too low
• Replace Battery
• Consult Factory for
service information
A to D NOT CONVERTING Fault in analog/digital
• Unit may self
correct, Press
ENTER to
converter
acknowledge &
clear alarm
• If error reasserts,
factory service is
required
TIME CLOCK ERROR
The correct time/date is no
longer shown
• Re-enter time and
date.
• If error occurs
again contact
factory
CAL CHECKSUM ERROR
Calibration constants have
been corrupted
• Report error to
factory
SETUP CHECKSUM ERROR The units setup has been
• Report error to
factory
corrupted
68
FC-21 Flow Computer
APPENDIX A
69
WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components which wear are not warranted, including but not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be
as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE,
AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
FOR WARRANTY RETURNS, please have the
following information available BEFORE
contacting OMEGA:
FOR NON-WARRANTY REPAIRS, consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:
1. Purchase Order number under which the product
was PURCHASED,
1. Purchase Order number to cover the COST
of the repair,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
relative to the product.
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2002 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
OMEGAnet® Online Service
Internet e-mail
Servicing North America:
USA:
ISO 9001 Certified
One Omega Drive, P.O. Box 4047
Stamford CT 06907-0047
TEL: (203) 359-1660
FAX: (203) 359-7700
e-mail: [email protected]
Canada:
976 Bergar
Laval (Quebec) H7L 5A1
TEL: (514) 856-6928
e-mail: [email protected]
FAX: (514) 856-6886
For immediate technical or application assistance:
®
USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA
®
Customer Service: 1-800-622-2378 / 1-800-622-BEST
®
Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN
TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA
Mexico:
En Espan˜ol: (001) 203-359-7803
FAX: (001) 203-359-7807
e-mail: [email protected]
Servicing Europe:
Benelux:
Postbus 8034, 1180 LA Amstelveen, The Netherlands
TEL: +31 (0)20 3472121
FAX: +31 (0)20 6434643
Toll Free in Benelux: 0800 0993344
e-mail: [email protected]
Czech Republic:
France:
Rudé armády 1868, 733 01 Karviná 8
TEL: +420 (0)69 6311899
Toll Free: 0800-1-66342
FAX: +420 (0)69 6311114
e-mail: [email protected]
9, rue Denis Papin, 78190 Trappes
TEL: +33 (0)130 621 400
FAX: +33 (0)130 699 120
Toll Free in France: 0800-4-06342
e-mail: [email protected]
Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
TEL: +49 (0)7056 9398-0
FAX: +49 (0)7056 9398-29
Toll Free in Germany: 0800 639 7678
e-mail: [email protected]
United Kingdom: One Omega Drive, River Bend Technology Centre
ISO 9002 Certified
Northbank, Irlam, Manchester
M44 5BD United Kingdom
TEL: +44 (0)161 777 6611
FAX: +44 (0)161 777 6622
Toll Free in United Kingdom: 0800-488-488
e-mail: [email protected]
It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.
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