Density (Consistency) Meter LQ500
Introduction
The LQ500 density (consistency) meter uses
microwave phase shift technology to determine
concentrations of solids in the material to be measured
flowing through pipes. It can perform a stable and
realtime density (consistency) measurement because
this technology is not affected by flow velocity along
with fluid color, and also is not easily affected by
contaminants and low process pressure rate. As the
LQ500 has no moving parts, it is reliable and virtually
maintenance free.
Figure 2. LQ500 Density (consistency) Meter
Since the output of the LQ500 is theoretically linear, it
can be applied to a wide range of density (consistency)
measurement.
Specifications
<Notice>
The LQ500 requires a full pipe to measure the
density (consistency). Contact Toshiba before
installation in the following cases:
■
Overall Specifications
Measurement method:
<Possibility of unfilled condition>
Microwave phase difference method
(a) When it is installed at the discharge of a pump.
(b) When installation is horizontal, and unfilled
condition occurs inside the pipe.
Measurement range:
80 to 300 mm
(3” to 12”)
2 to 50 %TS (*1) 1 to 50%TS (*1)
Meter size
50 mm (2”)
(c) A process where the pipe becomes unfilled
when the operation is stopped.
Span (*2)
Lower limit setting
range (4 mA)
Upper limit setting
range (20 mA)
0 to 48%TS
2 to 50%TS
0 to 49%TS
1 to 50%TS
External Sync control
contact input
DI / DO
Cable for power supply
(Detector/converter)
Density (consistency)
Setting increments
0.1%TS
measurement output 4-20mA
*1 TS: Total Solids
AC power supply
Ground resistance
100 ohm or less
*2 Span = Upper range – Lower range
*3 The material to be measured must be fluid
and be filled evenly with no voids.
Cable for communication
(Detector/converter)
Repeatability:
80 to 300 mm
(3” to 12”)
±0.01%TS
Figure 1. LQ500 Configuration Diagram
Meter size
50 mm (2”)
■
Standard Configuration
Repeatability
±0.02%TS
• Density (Consistency) Meter:
(Detector and converter separate mounted)
• Accessories: 1 set (see Table 1 below)
1 set
Note 1 : Above values are the results of commuting ability
in the phase measurements of the converter.
Note 2 : Density (consistency) determination
repeatability for sample reagent;
Table 1. Standard Accessories
50 mm 80 to 300 mm
Items
Power supply
cable
Communication
cable
Specifications
Between detector and
converter (*1)
Between detector and
converter (*1)
Quantity
Meter size
(2”)
(3” to 12”)
10 m
(32.8 ft)
10 m
For the full
scale value of
2%TS or
Density
±2%FS
±2%FS
(32.8 ft)
(consistency)
determination
repeatability
greater
2A(T), 250 V
(glass tube, 5.2 dia. x 20 mm)
Fuse
2
1
For the full
scale value of
less than 2%TS
±4%FS
Document
Instruction manual
Note 1: Need to prepare a power supply cable for the
LQ500.
*The characteristics of sample reagent has errors due
to sample tests such as uneven density (consistency)
distribution.
Refer to the section of cable specifications at the
overall specifications in detail.
*Full scale is the maximum value in the measurement
No. EJL- 106A
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LQ500
200 mm (8”)
250 mm (10”)
300 mm (12”)
Note 1: The LQ500 can not have an accurate density
(consistency) measurement when it is over the
8 mS/cm maximum
8 mS/cm maximum
6 mS/cm maximum
current signal (conforming to HART protocol(*1)).
Load resistance:240 to 750 ohm
Load capacity:0.25μF maximum
*1 HART (Highway Addressable Remote
Transducer) protocol is a communications
protocol for industrial sensors recommended
by HCF (HART Communication Foundation).
specification according to reduce the microwave signal.
Note 2: The LQ500 density (consistency) measurement
for application where liquids containing highly
conductive particles such as active carbon and
metal particles may be affected. Consult
Toshiba for detail when the measuring liquid
contains such particles.
Note: The optional AF900 hand-held terminal can be
used to operate the LQ500 from remote places
by connecting the AF900’s probe lead between
the LQ500’s 4-20 mA dc output signal lines.
Input signals
Wetting materials:
• External synchronized input signal:
In order to avoid problems of density
(consistency) measurement such as
inhomogeneous condition caused by
discontinuous process operation and empty pipe
condition caused by stopping process operation.
<Specification>
One dry “make” contact;
Contact capacity of 24Vdc with 0.1 to 2.0A is
required.
This contact signal can be used to start or stop
density (consistency) measurement in
synchronization with an external contact, such
as the contacts on a pump.
The measurement starts or stops as follows:
Contact closed: Starts density (consistency)
measurement.
Name
Materials (*1)
SCS14A cast (equivalent to
316 SS) (standard) (*2, *3)
316 stainless steel (*4)
Polysulfone (*4)
Main pipe
Temperature detector sheath
Applicator window
Applicator window sealant
*1 Avoid using the LQ500 for applications where
harmful liquids that cause corrosion, deterioration, or
changes in quantity for the wetting materials are used.
Make sure all materials at these wetting parts that are
suitable for your CIP or not before cleaning.
Fluoric rubber
*2 The smoothness inside the pipe on this material is;
Type
Meter size
50 to 200 mm
(1/2” to 8”)
250 & 300 mm
(10” & 12”)
50 to 300 mm
(1/2” to 12”)
Smoothness
No buffing
Standard type
Buffing # 150
Buffing # 150
Contact open: Stops density (consistency)
measurement.
Option type
• Density multiplier switching signal:
In order to achieve selecting up to 4 kinds of
liquid concentration measurement independently
as maximum.
*3 State the wetted materials when you choose these
options.
*4 The materials of them are changed for abrasive
applications.
<Specification>
Need to choose the specification code for this
application.
Two voltage signals described below are required:
Input voltage: H level: 20 to 30 Vdc
L level: 2 Vdc or less
Applicator:
Input resistance: Approx. 3k ohm
• Conductivity correction signal:
Need to prepare an additional conductivity meter
when using this function. Install in where is able
to have a stable and accurate measurement.
<Specification>
Serves as an antenna to send and receive
microwave signals, one set provided.
Temperature detector: RTD (Pt100)
Fitting:
Direct fitting to vertical or horizontal
piping. (Refer to the section of Piping
Precautions.)
Input signal: 4 to 20mAdc
Conductivity range: 0 to 10mS/cm
Update period for density (consistency)
measurement output and display:
Approx. 1 second
■
Converter Specifications
Output signals
• Density (consistency) measurement output:
4-20mAdc (load resistance 750 ohm maximum,
isolated output.)
• Density (consistency) fault or Maintenance
signal: 125Vac, 0.1A (resistive load) solid
state contact; opens when an error occurs in the
converter or when the LQ500 is in the setting
change mode, otherwise the contact remains
closed.
Functions by software as standard:
• Data saving function:
In order to save measurement data into the
memory of converter temporary.
The oldest data is overwritten.
<Specification>
Data storage points: 256 points maximum.
Period: 1 to 1,800 minutes (1 minute each).
ex 1: The data is saved for approx. latest 4.26
hours when programming every minute.
ex 2: The data is saved for approx. latest 21.3
Communication signal:
Digital signal is superimposed on 4-20mAdc
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LQ500
hours when programming every 5
minutes.
Operation panel and Display:
Used to check data or change various settings.
Operation switches: 5 switches.
Display: 4-line, 20-character LCD (dot-matrix)
with backlight.
• Moving average function:
In order to keep the average density (consistency)
output, or in order to suppress the deflection
width of the output. It helps for density
(consistency) control.
<Specification>
Enable to determine a number from 1 to 99.
• Change-rate limit function:
Power supply:
100 to 240Vac 50/60Hz (Allowable voltage: 85 to
264Vac)
Note: An additional power supply is required when
choosing an optional environmental
In order to reject the transient density
(consistency) output as noises, or a sudden
variation in the output according to intrusion by
bubbles, etc....
temperature specification type (-20 to 50 deg.C).
Refer to the section of Environmental
conditions in detail.
<Specification>
Note2: UL/CUL Hazardous locations type does not
have a power switch. Please prepare a power
switch outside. (Rated 250V AC,10A above,
DPST: Double-Pole/Single-Throw)
Allowable rate of change limit: 0.00 to 9.99%TS
Enable to determine a number from 0 to 99.
• Additive correction function:
Available for up to 10 kinds of mixed / blended
liquids. Sensitivity compensation can be set using
registered parameters depending on the type and
the mixing rate of liquids.
Use the power switch for Hazardous
locations in Hazardous locations area.
• Password function:
Power consumption: Approx. 25VA (100Vac),
This function is used to limit access to changing
parameters that affect measured data by means of
a password.
Approx. 35VA (240Vac)
Housing material: Steel plate
Arrestor:
Coating: Polyurethane
Arrestors are installed in the LQ500 current
output (4-20mAdc) and AC power lines.
MTBF: 135.8 months under 25 deg. C (77 deg. F)
based on MLL-HDBK-217F
Installation
■
Outline Dimensions
250 (9.8”)
190 (7.5”)
Unit: mm
(X)
(L)
Figure 3. LQ500 detector outline dimensions
Table 3. LQ500 detector outline dimensions
Weight (kg)
ANSI 150
Size (mm)
X (mm)
H (mm)
L (mm)
DIN 16
JIS 10K
50 (2”)
80 (3”)
170 (6.7”)
200 (7.9”)
220 (8.7”)
270 (10.6”)
320 (12.6”)
300 (11.8”)
360 (14.2”)
225 (8.9”)
225 (8.9”)
240 (9.4”)
260 (10.2”)
290 (11.4”)
315 (12.4”)
340 (13.4”)
300 (11.8”)
300 (11.8”)
300 (11.8”)
300 (11.8”)
300 (11.8”)
350 (13.8”)
350 (13.8”)
Approx.22
Approx.30
Approx.31
Approx.43
Approx.52
Approx.68
Approx.85
Approx.21 (46 lb)
Approx31 (68 lb)
Approx.34 (75 lb)
Approx.44 (97 lb)
Approx.54 (119 lb)
Approx.68 (150 lb)
Approx.99 (218 lb)
Approx. 21
Approx. 26
Approx. 29
Approx. 42
Approx. 48
Approx. 64
Approx. 76
100 (4”)
150 (6”)
200 (8”)
250 (10”)
300 (12”)
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LQ500
Unit: mm
Weight: 7kg(15 lb)
74 (2.9”)
In the case of Wall mounting
74 (2.9”)
In the case of 50A (2”) mounting
110
(4.3”)
Steel pipe U bolt
(M10)
234 (9.2”)
(119)
(4.7”)
Converter
communication port
Contact signal I/O port (1)
Density signal output port
Grounding terminal
Converter power
supply cable port
Contact signal I/O port (2)
Reserved
Steel pipe
(50A) (2”)
Figure 4. LQ500 Converter outline dimensions
■
■
Installation Precautions
Piping Precautions
(1) A vertical installation of the LQ500 is
recommended.
(1) Install the LQ500 in an environment free from
vibration and corrosive gases and in a place
which allows easy on-site maintenance.
(2) Provide a clearance space both detector and
converter to the front, rear, and above the unit.
See Figure 5.
Avoid installing horizontally (install LQ500
vertically) in case of following environments.
a) Places where bubbles or environments
air remain in the pipe.
b) Places where solids concentration in
the fluid is not even because solids in
the fluid stay either at the bottom or
top of the pipe due to slow fluid
(3) Provide a sunshade for the detector and
converter if direct sunlight is unavoidable
when installing outdoors.
(4) The LQ500 cannot be installed in an
environment where there is a possibility that
flammable or explosive gases may leak.
(5) The LQ500 should avoid the following
environmental installations:
velocity or other reason.
c) Pipe size is enlarged to install a larger
meter sized LQ500.
(2) Install the LQ500 in a pipeline where the
pipe is always filled with fluid and without
bubbles or entrapped air. If these conditions
are not satisfied, the measured value varies
or may give an inaccurate reading. It is
recommended that the LQ500 is installed at
the outlet instead of the suction side.
(3) Avoid places where sediment collects at the
bottom of the pipe.
(4) Avoid places where air gets into the fluid. To
avoid this problem, install the LQ500 to the
outlet of a pump, not to the suction side.
(5) When installing the detector horizontally,
install it so that the RF-part of it is oriented up
(that is, a pair of applicators stay horizontally)
to make it easier for maintenance work and to
obtain its specified performance.
• Places where condensation accumulates due
to sudden temperature changes.
• Places of low or high temperature that is out
of the specification.
• Places near equipment that produces strong
electric waves or electrolytes.
• Places where flammable or explosive gas
may be generated.
Unit: mm
Converter
500 (19.7”)
Maintenance
space
RF part
Back
Detector
Front
Maintenance
space
500 (19.7”)
(6) The LQ500 can be installed in either direction
(upstream or downstream) and without
requiring a straight pipe section. Install it in a
place allowing easy on-site maintenance.
A 500 mm (19.7”) maintenance
space is also needed above unit.
500 (19.7”)
Figure 5. Clearance space
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LQ500
(7) Install an adjustable piping mechanism if there
Install this valve to the side of the pipe in the
case of horizontal installation. It is
recommended that a 1-inch ball valve be
installed to the side of the pipe.
is a possibility that the detector pipe may not fit
between mating flanges.
(8) Install the LQ500 in a place where enough
water pressure is applied. Therefore, it is
recommended that the LQ500 be installed as
far away as possible from the pipe outlet
opened to atmosphere. This is to prevent the
effects of air being trapped in the liquid.
(9) If there is a possibility of no liquid flow or
uneven liquid distribution occurring when a
pump is off, use an external synch control
signal to operate the LQ500 only when the
pump is working.
Stop valve
Stop
valve
Vent valve
Zero point water pipe
Zero point water valve
Drain valve
LQ500
Bypass
pipe
Drain pipe
(10) Provide a stop valve at upstream and
downstream of the detector, and between stop
valves and the LQ500 provide the four valves
described below with a stop valve attached to
each: 1) sampling outlet valve; 2) zero point
water inlet valve; 3) vent valve; and 4) drain
valve. If it is not possible to stop the fluid at the
point where the LQ500 is installed, provide a
bypass pipe with a stop valve provided in the
middle. These valves are needed to drain the
fluid from the detector pipe and fill it with
drinking water (density or consistency 0%) to
adjust the zero point. See Figures 6 and 7.
(11) Use gaskets for piping of the size conformed to
flange rating and of the material appropriate
for the liquid to be measured.
Stop valve
Flow direction
(from down to up directions)
Figure 6. Recommended Installation
(vertical installation)
Zero point
Vent valve
water valve
LQ500
Stop valve
Stop valve
Sampling
valve
Drain
valve
NOTE:
Bypass pipe
Stop valve
• Zero point water valve:
Used to supply drinking water (density or
consistency 0%) to the detector pipe for zero
point adjustment. Install this valve at the top of
the pipe in the case of horizontal installation. It
is recommended that a 1-inch ball valve be
installed on the top of the pipe and zero point
water supplied through this inlet using a vinyl
hose etc.
Note: If valve water pipe is connected to this
valve, air cannot be extracted. Therefore,
another valve (vent valve) is needed to
extract air.
Figure 7. Recommended Installation
(horizontal installation)
■
Wiring Precautions
(1) Provide a switch and a fuse to isolate the unit
from the mains power for ease of maintenance.
(2) Ground the LQ500 with 100 ohm or less
ground resistance. Do not use a common
ground shared by other power equipment.
(3) Use the accessorious cables for communication
and power supply between detector and
converter. Connect cables to the terminals that
match the marking on the cables.
• Vent valve:
Used to vent process fluids to open air when
performing zero adjustment. This helps the
drinking water (density or consistency 0%)
enter the detector pipe easily. Install this valve
on the top of the pipe in the case of horizontal
installation.
(4) Use a sheathed cable with 2mm2
cross-sectional area for AC power cable.
(5) The cables should be free from vibration and
should have no slack in the cables.
(6) Wire the LQ500 output in conduit separated
from those of AC power cable, control signals,
alarm signal or other cables which could
become the source of noise.
• Drain valve:
Used to drain the fluids before supplying
drinking water (density or consistency 0%) to
the detector pipe for zero adjustment. Install
this valve at the lowest point of the pipe. It is
recommended that a 1-inch ball valve be
installed at the lowest point of the pipe.
(7) Use a 2-wire shielded sheathed cable to wire
the LQ500 output (4-20mAdc) and
conductivity signal. Ground the shielded cable
on the receiving instrument side for both cable.
• Sampling valve:
Used to extract fluids for manual analysis.
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LQ500
Converter
CVVS
Conductivity
signal input
(4-20mAdc)
Ec+
CVV
RF part
Ec-
FG
L1
L2
Power supply 100 to 240 Vac, 50/60Hz
CVVS
Tx+
TX-
Rx+
Rx-
SG
Tx+
Tx-
Rx+
Rx-
SG
Ground terminal (PE)
(Ground resistance 100 ohm or less)
CVVS
AO+
AO-
Density (consistency) measurement output
(4-20mAdc, 750 ohm max., isolated output)
DI3
Communication cable
CVVS
FG
Density multiplier switching voltage inputs
(H level: 20 to 30 Vdc, L level: 2 Vdc or less and Input
resistance: Approx. 3k ohm)
FG
DI2
+24V
0V
+24V
0V
COM2
DO1
COM1
DI
Density (consistency) measurement output
(4-20mAdc, 750 ohm max., isolated output)
Power supply cable
FG
FG
External synch. Control contact signal input
(Contact capacity: 24Vdc, 0.1 to 1A)
COM
FG
CVV
Chassis ground terminal
(Ground resistance 100 ohm or less)
Ground terminal
(Ground resistance 100 ohm or less)
Notice 1: Do not connect to the “FG” terminals neither communication cable nor power supply cable in the detector side.
Notice 2: Either “PE” terminal on the terminal block in the converter on the chassis ground terminal of the unit should be grounded with 100
ohm or less ground.
Notice 3: Ground the shielded cable on the receiving instrument side.
Notice4: UL/CUL Hazardous locations type does not have a power switch. Please prepare a power switch outside. (Rated 250V AC,10A above,
DPST: Double-Pole/Single-Throw)
Use the power switch for Hazardous locations in Hazardous locations area.
Figure 8. External connections
(8) As the cable port is made air-tight using a
packing, tighten the cable gland securely when
all the wiring is completed. If the diameter of
the cable is smaller than the inside diameter of
the packing, enlarge the cable diameter to the
same size as the packing by wrapping valves
around the cable Its suitable diameter is 11mm.
Tighten the terminal screws securely. Its
suitable torque is 1.0 to 1.7 N⋅m.
the LQ500 anywhere along the current output
line. For example, the cable lead may be
connected to the signal terminals on the
receiving side in the control room. See Figure
9.
LQ500 converter
Control room
Instrument (load)
Density meter output
(9) Screws at the terminals are needed to tighten
with 1.2 N·m torque (1.4 N·m is maximum).
(10) Do not turn on the power supply under the
uninstalled condition.
(11) Each cable in the communication cable and
power supply cable between detector and
converter has a banded marks for each
terminals. Connect them correctly without any
mismatches.
Hand-held terminal
AF900 (option)
•Wiring when communications function is used
By connecting the cable lead of the optional
AF900 hand-held terminal to the density
(consistency) measurement output, you can
operate the LQ500 from remote places.
Figure 9. Wiring for communication function
1) Make sure the load resistance of 4-20mAdc
line of output is between 240 and 750 ohm,
and the load capacitance is 0.25µF maximum.
2) The AF900’s cable lead can be connected to
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LQ500
Ordering Information
When ordering the LQ500, refer to Table 4. Type
Specification Code. An entry must be made for each of
the columns.
The following items must also be specified:
1. Fluid characteristics:
• Type of material to be measured
• Density (consistency) (max., normal, min.)
• Temperature (max., normal, min.)
• Pressure (max., normal, min.)
• Conductivity (max., normal)
2. Measurement range
3. Tag number (specify “None” if not needed)
4. Hand-held terminal Required or not
(Refer to Table 5 below.)
5.Other specific items
No. EJL-106A
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LQ500
Table 5. Type Specification Code
(AF900 Hand-held Terminal)
Table 4. Type Specification Code
(LQ500 Density (consistency) Meter)
TYPE
Model
1 2 3 4 5
A F 9 0 0
Specification Code
CAT Code
SPECIFICATION
Description
6
7
8
9
10 11 12
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Hand-held terminal
For use with LQ series
Display language English
Standard
L Q 5 0 0
A
Microwave Density (Consistency) Meter
Standard
L
Q
3
A
Meter Size
0 5
0 8
1 0
1 5
2 0
2 5
3 0
50mm (2")
80mm (3")
100mm (4")
150mm (6")
200mm (8")
250mm (10")
300mm (12")
A
A
3
Table 6. PED matrix
Meter Size
Flange
mm
inch
50
2
80 100 150 200 250 300
Mounting Style
3
4
6
8
10
Certified
Certified
Certified
12
B
C
F
JIS 10K flange connection
ANSI 150 flange connection
DIN 16 flange connection
Purpose
DIN16
DIN10
SEP
SEP
ANSI150
SEP
A
B
Standard
SEP: Not required the PED.
for PED (150 to 300 mm
(6" to 12") for EU) (Note 1)
for UL/CUL Hazardous locations
type
Certified: The PED is certified.
C
Check your flange type and its meter size of the LQ500
whether it corresponds to the PED or not when its
installing location is in the Europe.
Wetting parts
A
B
SCS14A cast (Equivalent to 316L
SS) pipe (standard)
SCS14A cast (Equivalent to 316L
SS) pipe with teflon PFA coating for
sticky application
If yes, you need to choose the code “B” at the 10th
column in the specification code (Table 4)
C
D
SCS14A cast (Equivalent to 316L
SS) pipe for abrasive application
(Note 2)
Hastelloy C pipe
Cable length between detector
(RF part) & converter
10 m (32.8 ft) (standard)
20 m (65.6 ft)
30 m (98.4 ft)
40 m (131.2 ft)
A
B
C
D
E
50 m (164 ft)
X
None (Note 3)
Optional specifications
None (standard) (blank codes are
required.)
A B Pipe buffing type
A C -20 to 50 deg.C (-4 to 122 deg.F)
environment temperature
specification, 200 to 240 Vac power
supply type of LQ500
A D Pipe buffing type with -20 to 50
deg.C (-4 to 122 deg.F) environment
temperature specification, 200 to 240
Vac power supply type of LQ500
A E -20 to 50 deg.C (-4 to 122 deg.F)
environment temperature
specification, 100 to 120 Vac power
supply type of LQ500
A F Pipe buffing type with -20 to
50deg.C (-4 to 122deg.F)
environment temperature
specification, 100 to 120 Vac power
supply type of LQ500
Note 1: The specification of PED (Pressure Equipment
Directive) is required from 150 to 300 mm (6" to
12") when the installation location is in the Europe.
Note 2: The differences between standard type are RTD
sensor and Applicator window.
Note 3: Toshiba recommends to using our specified cable.
ISO9001 and ISO14001 are certified.
Specifications are subject to change without notice.
Printed in Japan 2006-11 (TDOC)
© TOSHIBA Corporation 2003
All Rights Reserved.
Misuse of this product can result in damages to property or human injury.
Read related manuals carefully before using this product.
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