GE Clothes Dryer K400 User Manual

GE Infrastructure  
Sensing  
Druck DBC 150/650 Series  
Dry block temperature calibrator  
User manual - K400  
[EN] English  
[FR] French  
[DE] German  
1 ..... 56  
TBA  
TBA  
[IT]  
Italian  
TBA  
[PT]  
[ES]  
Portuguese  
Spanish  
TBA  
TBA  
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Introduction  
This technical manual provides operating instructions for the Druck  
DBC Series of Dry Well Calibrators.  
Safety  
The manufacturer has designed this equipment to be safe when  
operated using the procedures detailed in this manual. Do not use this  
equipment for any other purpose than that stated.  
This publication contains operating and safety instructions that must be  
followed to ensure safe operation and to maintain the equipment in a  
safe condition. The safety instructions are either warnings or cautions  
issued to protect the user and the equipment from injury or damage.  
Use suitably qualified * technicians and good engineering practice for  
all procedures in this publication.  
Test leads  
Only use the test leads supplied with the instrument, do not use these  
test leads with any other equipment.  
Power isolation  
Access to the power supply isolator switch must not be obstructed.  
Toxic Materials  
There are no known toxic materials used in construction of this  
equipment.  
Maintenance  
The equipment must be maintained using the procedures in this  
publication. Further manufacturer’s procedures should be carried out  
by authorized service agents or the manufacturer’s service  
departments.  
Technical Advice  
For technical advice contact the manufacturer.  
*A qualified technician must have the necessary technical knowledge,  
documentation, special test equipment and tools to carry out the required  
work on this equipment.  
This equipment meets the requirements of all relevant  
European safety directives. The equipment carries the CE  
mark.  
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TRACEABILITY AND CALIBRATION REPORT  
Each DBC instrument is supplied as standard with a calibration report,  
declaring traceability to a National or International standard.  
WARRANTY AND LIABILITY  
1
Our equipment is guaranteed against defective material and  
workmanship during the warranty period. Claims under warranty  
can be made by returning the equipment, prepaid, to our factory. The  
equipment will be replaced, repaired or adjusted at our discretion.  
2
3
The liability of GE is restricted to that given under our warranty. No  
responsibility is accepted for damage, loss or other expense  
incurred through the sale or use of our equipment.  
Under no circumstances will GE be liable for any special incidental  
or consequential damage.  
Symbols  
The following symbols are used to identify hazards on the instrument:  
This symbol, on the instrument, indicates that the user  
should refer to the user manual.  
This symbol, on the instrument, indicates a very hot  
surface that must not be touched.  
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Safety Instructions  
This instrument should only be used by suitably qualified * technicians  
During operation observe the following safety instructions:  
1
2
3
4
5
USE the instrument in vertical position only.  
DO NOT place any object on the protection grid of the dry well.  
DO NOT put any liquid into the dry well and/or on the inserts.  
DO NOT use fluids to clean the dry well and/or the inserts.  
BEFORE any maintenance activity, WAIT for the instrument to cool  
to ambient temperature (keep the instrument switched on, to allow  
the cooling fan to operate).  
6
DO NOT touch the protection grid until it has cooled to ambient  
temperature).  
7
The instrument must be at ambient temperature before storing in any  
transit case or packing system.  
8
DO NOT use this instrument near inflammable liquids or in  
Hazardous areas.  
9
DO NOT place either your hands, or any other object, into the dry  
well.  
10  
11  
12  
Before use, REMOVE all traces of contamination from the device  
under test.  
During normal operation, this instrument could reach high  
temperatures.  
Always observe all the safety instructions.  
*A qualified technician must have the necessary technical knowledge,  
documentation, special test equipment and tools to carry out the required  
work on this equipment.  
Abbreviations  
The following abbreviations are used in this manual; the  
abbreviations are the same in the singular and plural.  
BLK block  
ent  
enter  
CJ  
Cold Junction  
CJC Cold Junction Compensation  
DBC Dry Block Calibrator  
°C  
Degrees Centigrade  
milliampere  
in  
inch  
mA  
mV  
mm millimetre  
RDG reading  
millivolt  
RTD Resistive Temperature Device  
T/C  
TC  
Thermocouple  
Temperature Calibrator  
V
Volt  
TS  
Temperature Source  
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TABLE OF CONTENTS  
Introduction.................................................................................. .......... i  
Safety .......................................................................................... .......... i  
Traceability and Calibration Report.............................................. .......... ii  
Symbols....................................................................................... .......... ii  
Safety Instructions........................................................................ .......... iii  
Index .......................................................................................... ..........iv  
Standard and optional accessories............................................... .......... vii  
1
INTRODUCTION............................................................... ..........1  
1.1 Automatic calibration ......................................................... ..........2  
1.2 Parts identification ............................................................. ..........2  
2
INSTALLATION.................................................................. ..........4  
2.1 Preparation........................................................................ ..........4  
2.2 Power Supply..................................................................... ..........4  
2.3 Temperature Probes........................................................... ..........4  
2.4 Electrical Connections........................................................ ..........6  
3
OPERATION...................................................................... ..........11  
3.1 Key-pad Functions............................................................. ..........11  
3.2 Operating Displays............................................................. ..........13  
Menu selection screen....................................................... ..........13  
System Set-up screen........................................................ ..........13  
Working screen................................................................... ..........13  
Help/Info screen................................................................. ..........14  
Self-test screen.................................................................. ..........14  
3.3 Functional Modes............................................................... .......... 15  
Reading of the generated temperature.............................. ..........15  
Dual display - (generated temperature and an input test).. ..........15  
3.4 Temperature Reference Selection...................................... ..........16  
Internal reference probe..................................................... ..........16  
External reference probe.................................................... ..........16  
3.5 System Set-up .................................................................. ..........18  
Language settings.............................................................. ..........18  
Temperature unit settings................................................... ..........18  
Key-pad audio signal.......................................................... ..........19  
Digital Interface settings..................................................... ..........19  
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Printer settings................................................................... ..........20  
Calibration.......................................................................... ..........20  
Protection code.................................................................. ..........21  
3.6 Testing Modes.................................................................... ..........22  
Direct mode........................................................................ ..........22  
Step mode.......................................................................... ..........23  
Fixed step selection............................................................ ..........23  
Programmable step selection............................................. ..........24  
Ramp mode........................................................................ ..........25  
Preset values mode............................................................ ..........26  
3.7 Measuring an Input............................................................ ..........27  
Switch test.......................................................................... ..........27  
Thermocouple testing......................................................... ..........28  
Internal............................................................................... ..........29  
Setting Cold Junction Compensation................................. ..........29  
Direct ................................................................................. ..........30  
CAL mode.......................................................................... ..........30  
Absolute............................................................................. ..........31  
% of span............................................................................ ..........31  
% of reading....................................................................... ..........32  
RTD measurements........................................................... ..........33  
Direct ................................................................................. ..........34  
CAL mode.......................................................................... ..........34  
Absolute............................................................................. ..........35  
% of span............................................................................ ..........35  
% of reading....................................................................... ..........36  
Current measurements....................................................... ..........37  
Direct ................................................................................. ..........37  
CAL ................................................................................... ..........38  
Voltage measurements (high level).................................... ..........39  
Direct ................................................................................. ..........39  
CAL ................................................................................... ..........40  
Voltage measurements (low level)...................................... ..........41  
Resistance measurements................................................. ..........42  
4
SERIAL COMMUNICATION ............................................. ..........43  
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4.1 DBC Series - Serial Commands Protocol.......................... ..........43  
CALIBRATION.................................................................. ..........48  
5
Calibration of the Standard Reference Probe Input..................... ..........48  
Calibration of the External Reference Probe ............................... ..........49  
Calibration of the Internal Dry Well Sensor.................................. ..........49  
Calibration of the Millivolt Input Range ........................................ ..........50  
Calibration of the Volt Input Range.............................................. ..........51  
Calibration of the mA Input Range .............................................. ..........51  
Calibration of the Ohm Input Range ............................................ ..........52  
6
7
FAULT FINDING ............................................................... ..........53  
MAINTENANCE................................................................. ..........54  
7.1 Cleaning Instructions.......................................................... ..........54  
TECHNICAL SPECIFICATION ......................................... ..........55  
8
8.1 Standard Specification........................................................ ..........55  
8.2 Common Specification....................................................... ..........55  
8.3  
Electrical Input Specification (DBC-TC models)................ ..........56  
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STANDARD ACCESSORIES DBC-TC series  
The DBC-TC series is supplied with the following standard accessories:  
Operating manual  
Set of leads for:  
2 test leads and 2 clamps for switch connection  
6 test leads and 6 clamps for connection of electrical signal  
Power supply cable  
Removable insert with 3 holes (5, 6.6, 9.8 mm diameter), (3/16, 1/4,  
3/8 in. diameter for USA)  
Tool for extraction of removable insert  
RS232 interface cable (1.5 metre, 5 pin/5 pin)  
Traceable calibration certificate  
2 spare fuses (see page 4 for more information)  
OPTIONAL ACCESSORIES DBC-TC series  
Option B1 for DBC 150, reference probe type PT 100, range –50°C  
to +400°C  
Option B2 for DBC 650, reference probe type PT 100, range +50°C  
to +650°C  
Option B3, temperature probe type PT 100, range –50°C to +650°C.  
Option D, fast cooling device  
Option E, aluminium transit case  
Option C1/C2, insert with 2 holes (5 and 13 mm diameter), (3/16,  
1/2 in. diameter for USA)  
Option C3/C4, insert with 4 holes (3.4, 5, 5, 8.2 mm diameter), (1/8,  
3/16, 3/16 and 5/16 in. diameter for USA)  
Option C5/C6, blank insert  
Option C7/C8, insert with special holes.  
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STANDARD ACCESSORIES DBC-TS series  
The DBC-TC series is supplied with the following standard accessories:  
Operating manual  
Set of leads for:  
2 test leads and 2 clamps for switch connection  
Power supply cable  
Removable insert with 3 holes (5, 6.6, 9.8 mm diameter), (3/16, 1/4,  
3/8 in. diameter for USA)  
Tool for extraction of removable insert  
RS232 interface cable (1.5 metre, 5 pin/5 pin)  
Traceable calibration certificate  
2 spare fuses (see page 4 for more information)  
OPTIONAL ACCESSORIES DBC-TS series  
Option B1 for DBC 150, reference probe type PT 100, range –50°C  
to +400°C  
Option B2 for DBC 650, reference probe type PT 100, range +50°C  
to +650°C  
Option B3, temperature probe type PT 100, range –50°C to +650°C.  
Option D, fast cooling device  
Option E, aluminium transit case  
Option C1/C2, insert with 2 holes (5 and 13 mm diameter), (3/16,  
1/2 in. diameter for USA)  
Option C3/C4, insert with 4 holes (3.4, 5, 5, 8.2 mm diameter), (1/8,  
3/16, 3/16 and 5/16 in. diameter for USA)  
Option C5/C6, blank insert  
Option C7/C8, insert with special holes.  
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1
INTRODUCTION  
The DBC series of temperature calibrators test and calibrate temperature devices.  
The series comprises two types: a TS (Temperature Source) and a TC  
(Temperature Calibrator). Multilingual firmware provides a menu-driven user  
interface in English, French, German, Italian, Spanish and Portuguese. An RS232  
digital interface, supplied as standard, enables remote operation of the instrument  
from a compatible computer.  
TS (Temperature Source)  
The DBC-TS generates stable temperatures and accurately measures the  
temperature of the dry well. It provides an automatic switch test facility.  
There are two models of the DBC-TS, providing the same operating capabilities at  
different temperature ranges:  
DBC 150-TS : -45°C below ambient temperature to +150°C.  
DBC 650-TS : +50°C to +650°C.  
This series of calibrators uses the GE technology temperature controller, providing  
high performance temperature stability and accuracy. Temperature generation can  
be controlled either in manual mode (direct) or automatic with ramping, stepping or  
preset functions. The dry well temperature can be measured either with the internal  
probe or with an external certified reference probe. The key-pad, display and  
electrical connections enable the user to carry out test procedures for RTD and  
thermal switches with a hysteresis calculation.  
TC (Temperature Calibrator)  
The DBC-TC generates stable temperatures and accurately measures the  
temperature of the dry well. It measures process signals from the temperature  
devices under test.  
There are two models of this series, providing the same operating capabilities at  
different temperature ranges:  
DBC 150-TC : -45°C below ambient temperature to +150°C.  
DBC 650-TC : +50°C to +650°C.  
This series of calibrators uses the GE technology temperature controller, providing  
high performance temperature stability and accuracy. Temperature generation can  
be controlled either in manual mode (direct) or automatic with ramping, stepping or  
preset functions. The dry well temperature can be measured either with the internal  
probe or with an external certified reference probe.  
The key-pad, display and electrical connections enable the user to carry out test  
procedures for thermocouples, RTD, switches, temperature transmitters and  
converters, regulators. Both TC models contain a switch test function with a  
hysteresis calculation. This Input/Measure facility enables direct connection and  
reading of thermocouples, RTD, Voltages, Current and Resistance: the dual display  
can simultaneously show the generated temperature (with internal or external  
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reference) and a possible electrical feedback from a device under test (i. e.  
temperature probes, temperature transmitters). An error calculation, with scaling  
function, allows the user to check immediately the accuracy specification of the unit  
under test. A 24 V auxiliary excitation provides power for temperature transmitters  
under test.  
1.1 Automatic Calibration  
An RS232 computer interface enables a Calibration Management Software to  
provide automatic calibration procedures, typically with the following capabilities:  
Creation of instrument details  
Creation of test procedures and work orders  
Analysis of devices due for calibration  
Printing of calibration reports  
Export functions  
Refer to section 4 SERIAL COMMUNICATION for remote control of this instrument.  
1.2 Parts Identification  
Key to Figure 1-1  
Fig no.  
Description  
Dry well with insert  
Protection grid  
1
2
3
4
Carrying handle  
4 mm socket for T/C, RTD and ohm connection, with CJ compensation  
Tactile key-pad for direct selection of all the operating function (ramps, steps, preset  
values, switch test, help, set-up) and to set temperature values  
Cooling fan  
5
6
7
Support feet (4)  
Protection fuse (115 Vac 2x12.5 AT and 230 Vac 2x6.3 AT for DBC 650  
(115 Vac 2x1.6 AT and 230 Vac 2x3.15 AT for DBC 150)  
8
Main power selector 100 - 120 Vac and 220 - 240 Vac, 50/60 Hz  
9
Power supply on/off switch  
10  
11  
12  
Main power socket: to connect the standard power cable  
RS232 serial communications interface  
Cursor (arrow) keys to select operating functions from the main menu and to move the  
selection cursor through the menus  
13  
Digital display with Multi-language user interface  
14  
15  
16  
Switch test connection, suitable to connect test leads supplied as standard  
4 mm socket for voltage and current input with 24V dc auxiliary excitation  
Lemo connection for external reference probe: suitable for connecting PT 100 probes  
with 3 or 4 wires, supplied with standard mating connector ( B1, B2 and B3 options)  
17  
2
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17  
2
1
16  
3
15  
14  
13  
4
5
17  
DBC-TS  
15  
12  
6
7
9
8
10  
11  
Figure 1-1  
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2
INSTALLATION  
2.1 Preparation  
General  
Remove the instrument from the carrying case and use it on a flat, stable  
surface. To avoid any possible damage, either to the instrument or the unit  
under test, the dry well of the instrument must be used in the vertical position.  
The fan system at the base of the instrument must be free from any obstruction.  
The dry well must be completely clean.  
Carefully read the SAFETY section of this manual.  
2.2 Power Supply  
CAUTION:  
BEFORE OPERATING, CHECK THAT THE POWER SUPPLY SELECTOR SWITCH  
SETTING MATCHES THE POWER SUPPLY VOLTAGE.  
The DBC series of calibrators operate from an a. c. power supply of 100 to 120 Vac  
or 220 to 240 Vac, 50-60 Hz.  
CAUTIONS:  
1
THE POWER SUPPLY MUST PROVIDE CONNECTION TO A PROTECTIVE GROUND  
TERMINAL.  
2
THE INSTRUMENT MUST, AT ALL TIMES, BE CONNECTED TO THE SUPPLY EARTH  
(GROUND).  
2.3 Temperature Probes  
WARNING  
AFTER USE, THE PROBES WILL BE VERY HOT. HANDLE WITH  
CARE AND WAIT FOR THE PROBES TO COOL COMPLETELY.  
The temperature probe to be tested must be correctly placed in the dry well to  
produce accurate test results:  
Check the probe diameter and operating range and use reduction inserts with  
the correct sized holes (the hole diameter should comply with EA-10/13  
guidelines). A large temperature difference between probe and dry well causes  
large measuring errors. This difference increases as the difference between  
the diameters increases.  
Always clean the probes, before use.  
Do not force the probes into the dry well, insert the probe down to the bottom of  
the dry well.  
4
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When testing a probe with a certified reference probe, place both probes close  
together and at the same depth.  
NO  
YES  
160mm  
50  
mm  
*
NO  
NO  
YES  
YES  
Internal reference probe  
* dimension should comply with EA-10/13 guidelines - for temperature  
ranges -80° C to +660°C maximum 0.5mm  
IMPORTANT NOTE  
Reduction inserts with special holes could be necessary when carrying out a  
calibration procedure on temperature device with specific mechanical  
dimensions. Refer to GE for details of specific application solutions.  
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2.4 Electrical Connections  
Connection of a Thermocouple sensor  
-
+
24V Out  
35mA max  
V IN  
Ref RTD  
35mA  
max  
0V  
mA IN  
X MTR  
CAT I  
max 30V  
Use of screw connections for T/C wires  
1
2
3
4
6
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Connection of a 3-wire RTD.  
24V Out  
35mA max  
V IN  
Ref RTD  
35mA  
max  
0V  
mA IN  
X MTR  
CAT I  
max 30V  
Connection of a 4-wire RTD  
24V Out  
35mA max  
V IN  
Ref RTD  
35mA  
max  
0V  
mA IN  
X MTR  
CAT I  
max 30V  
Connection of a 2-wire T/I transmitter (external 24 V dc excitation)  
24V Out  
35mA max  
V IN  
Ref RTD  
35mA  
max  
0V  
mA IN  
X MTR  
CAT I  
max 30V  
0V user supply (SELV)  
I
24V user supply floating (SELV)  
T
-
+
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Connection of a 2-wire T/I transmitter (with 24 V dc auxiliary excitation)  
24V Out  
35mA max  
V IN  
Ref RTD  
35mA  
max  
0V  
mA IN  
X MTR  
CAT I  
max 30V  
I
T
General  
The temperature probes to be tested fit into an appropriate size reduction insert  
located in the 30 mm diameter hole of the dry well. The dry well can be heated by  
either cartridge heaters (DBC 650) or Peltier cells (DBC 150). A fan system fitted  
on the bottom of the instrument reduces the temperature during cooling operations.  
Operating procedure  
The DBC Series can be used to carry out comparison test using a variety of  
methods:  
Reading of temperature calibration with the internal regulation probe  
The generated temperature  
Unit under Test  
is considered as reference  
value and is shown on the  
DBC display: this  
temperature is measured  
with the standard internal  
probe.  
Dry Well  
Internal Temperature  
Probe  
8
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Calibration with external reference probe  
The temperature value to be considered as standard is measured with an external  
and certified reference probe. This measurement reading can be directly shown  
either on the DBC display (connecting the reference probe to the REF RTD socket  
on the top of the instrument) or with an external, certified electronic calibrator.  
Unit under Test  
External Certified  
Reference Probe  
Dry Well  
Internal Temperature  
Probe  
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Power, reading and calibration of devices  
under test (DBC-TC only)  
The DBC-TC series has the input capability to  
directly measure the electrical signal of unit  
under test (T/C, RTD, mA, V, Ohms): using an  
error calculation function (with scaling  
capability), calibration procedures can be  
carried out and the UUT accuracy immediately  
measured.  
A 24 V auxiliary excitation supply is also  
available to power the loop of the device due for  
calibration. The generated temperature can be  
measured with the internal or the external  
reference as described above.  
External probe connections  
A
1
2
3
4
Wire 1  
Wire 1a  
Wire 2  
Wire 2a  
A
10  
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3
OPERATI0N  
3.1 Key-pad Functions  
9
6
3
7
4
1
8
5
2
0
+/-  
setup  
info  
direct  
help  
menu  
ent  
#
ce  
ent (Enter) key  
1.  
Pressing this key to confirms the selected choices or the temperature set-  
point.  
ce (clear entry) key  
2.  
Pressing this key cancels the previous key operation or corrects a typing  
error.  
menu/setup key  
3.  
Pressing this key recalls the Menu Selection Screen. Pressing this key after  
the # key (2nd function), selects the SETUP menu display.  
# key  
4.  
Pressing this key selects DIRECT temperature generation mode. Pressing  
this key with other keys recalls second functions (# + set-up, # +  
etc.).  
, # +  
help/Info key  
5
Pressing this key recalls a related display containing more information, either  
on the selected function or on the operation to be performed. Pressing this  
key after the # key, changes the display containing information relating to the  
selected temperature reference or to the selected test function (for example  
switch test).  
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+/- key  
6
Pressing this key changes the sign on working screen. Pressing this key  
after the # key, recalls the Switch Test function. Pressing # and +/- again to  
return to the working screen.  
key  
7
Pressing this key sets the decimal point. Pressing this key after the # key,  
recalls the step generation mode, starting from the step selection screen.  
0 key  
8
Pressing this key zeroes the display. Pressing this key after the # key, recalls  
the ramp generation mode, starting from the Ramp set-up screen.  
1- 9 (numeric) keys  
9
Using these numeric keys sets a temperature value or a special generation  
mode (ramp limits, programmable steps etc.). Pressing keys 1- 5 after the #  
key, recalls specific preset values.  
(arrow) keys  
10  
Pressing these keys moves the screen cursor either in the horizontal or  
vertical direction. When the ramp and step functions are enabled, these keys  
can start, stop, hold or recall related values.  
12  
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3.2 OPERATING DISPLAYS  
The DBC-TC series has four operating displays:  
Menu selection screen  
REF T.  
MEASURE  
REF T.  
MEASURE  
INTERNAL  
SEL RTD  
NONE  
NONE  
INTERNAL  
SEL RTD  
T/C  
RTD  
mA  
T/C  
RTD  
mA  
MEASUE  
NONE  
DBC-TS  
This display shows the measure parameters. The arrow keys move the cursor in  
both horizontal and vertical directions.  
System Set-up Screen  
Press MENU to select the system set-up menu.  
SYSTEM SETUP  
LANGUAGE  
TEMPERATURE UNIT  
KEYBOARD  
SERIAL PORT  
PRINT  
Use the  
keys to move the cursor up/down and press ent to select.  
Working screen  
DBC-TC  
DBC-TS  
T/ C  
K
23.8° C  
°C  
RDG: 148.50  
0.15% SPAN  
SWITCH  
150.00  
150.00  
BLK  
DIRECT  
°C  
DIRECT  
°C  
148.00  
BLK  
148.00  
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This display shows the temperature set-point, the actual temperature (with internal  
or external reference) and the current temperature measurement. Use the numeric  
key-pad to set the temperature value and, using the second function key, change  
the direct function to ramping, stepping and preset.  
Help/Info screen  
REF T.  
MEASURE  
INTERNAL  
SEL RTD  
NONE  
SELECT  
ENT TO  
CONFIRM  
This display shows more information relating to the selected function or test/  
measure - (for example selected temperature reference – internal or external -,  
switch test, mA reading etc.).  
Self-test screen  
Note:  
When switched on, the display shows the self-test screen:  
Model  
Firmware release  
EPROM self-test  
Temperature regulator self-test  
DBC - 650 - TC  
V x. xx - mm/ yyyy  
Self test ....................................  
Eeprom  
Temp. Control  
OK  
OK  
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3.3 Function Modes  
Reading of the generated temperature  
150.00  
BLK  
DIRECT  
REF T.  
MEASURE  
NONE  
INTERNAL  
SEL RTD  
T/C  
RTD  
mA  
148.00 °C  
Press the MENU key to recall the Menu Selection Screen from any Working Screen.  
Leave the MEASURE (Input) display set to NONE to display the dry well (BLK)  
temperature with the temperature set-point shown in small numbers and arrow  
symbols indicating either a heating or cooling operation.  
Dual display – (generated temperature and an input (test) option)  
REF T.  
MEASURE  
T/ C  
K
23.8° C  
°C  
RDG: 148.50  
0.15% SPAN  
NONE  
INTERNAL  
SEL RTD  
150.00  
BLK  
DIRECT  
°C  
T/C  
RTD  
mA  
148.00  
From the Menu Selection Screen, use the horizontal and vertical cursor keys move  
the cursor through the REF. T and MEASURE displays. Select both the reference  
for the temperature to be generated and an input option (measure). The final  
working screen, configured as a dual display, shows two sections of equal size, dry  
well temperature and the unit under test feedback (with or without scaling  
capability).  
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3.4 Temperature Reference Selection  
The DBC series measures the dry well temperature in two different ways:  
Internal reference probe  
From the standard working screen, press the menu key to open the menu selection  
screen:  
REF T.  
MEASURE  
NONE  
INTERNAL  
SEL RTD  
T/C  
RTD  
mA  
Using the  
INTERNAL with the  
keys, move the selection cursor on the REF. T display. Select  
keys and press ent to activate the dry well temperature  
measure made with the internal regulation probe. The next display allows the  
setting-up of the temperature generation mode (Direct, Ramp, Step or Preset).  
External reference probe  
From the REF. T display of the Menu Selection Screen select the SEL RTD function  
using the  
keys and press ent.  
REF T.  
MEASURE  
NONE  
INTERNAL  
SEL RTD  
T/C  
RTD  
mA  
The next selection display now appears as follows.  
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Move the cursor with the  
keys, to select a REF 1or REF 2 connection and  
press ent.  
SEL RTD  
REF 1  
REF 2  
The following display allows the set-up of the temperature generation mode. Using  
this facility, the user can connect one of two certified probes to the Ref RTD  
connector and display the measured dry well temperature.  
Note:  
For best accuracy, use an optional reference probe (option B1, B2 or B3).  
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3.5 System Set-up  
Language setting  
The DBC series have multi-lingual firmware with a default setting of English. To  
select a different language, press the # + menu keys to recall the System Set-up  
Screen. Using the  
keys select the required LANGUAGE (English, French,  
German, Italian, Portuguese or Spanish) and press ent. Press ce to return to the  
Working Screen.  
SYSTEM SETUP  
LANGUAGE  
LANGUAGE  
TEMPERATURE UNIT  
KEYBOARD  
ENGLISH  
FRENCH  
GERMAN  
SERIAL PORT  
ITALIAN  
PRINT  
PORTUGUESE  
Temperature unit setting  
Press the # + menu keys to recall the System Set-up Screen, using the  
keys,  
select TEMPERATURE UNIT and press ent. Select the required temperature unit  
and press ent again. Press ce to leave the System Set-up Screen.  
SYSTEM SETUP  
TEMPERATURE UNIT  
LANGUAGE  
TEMPERATURE UNIT  
KEYBOARD  
SERIAL PORT  
PRINT  
°C  
°F  
K
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Key-pad audio signal  
The DBC series can give an audio signal to confirm each key press. To select this  
option, press the # + menu keys to recall the System Set-up Screen. Using the  
keys select KEYBOARD and press ent. Select the required function (beep  
off/on) and press ent again. Press ce to return to the Working Screen.  
SYSTEM SETUP  
KEYBOARD  
LANGUAGE  
TEMPERATURE UNIT  
KEYBOARD  
SERIAL PORT  
PRINT  
BEEP OFF  
BEEP ON  
Digital interface settings  
SYSTEM SETUP  
SERIAL PORT  
Address:  
LANGUAGE  
TEMPERATURE UNIT  
KEYBOARD  
SERIAL PORT  
PRINT  
1
To set the RS232 communication address, select the System Set-up Screen, using  
the keys select SERIAL PORT and press ent. To set the communication  
address, use the numeric key-pad and press ent. Press ce twice to exit the System  
Set-up Screen.  
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Printer settings  
To print calibration data via the RS232 interface, press the # + menu keys to recall  
the System Set-up Screen. Using the  
keys, select PRINT and press ent.  
Select the parameter to be printed using the  
keys, (set-point temperature  
[SET], dry well temperature [BLK], reference temperature [REF], measure [RDG]).  
Use the numeric keys to set the period, in seconds, between each printout and  
press ent. Press ce to return to the Working Screen.  
SYSTEM SETUP  
PRINT SETUP  
LANGUAGE  
TEMPERATURE UNIT  
KEYBOARD  
SERIAL PORT  
PRINT  
Period:  
SET  
BLK  
REF  
RDG  
0 sec  
NO  
NO  
NO  
NO.  
Calibration  
A PIN code protects the CALIBRATION function. Refer to 5 Calibration, page 47.  
SYSTEM SETUP  
CALIBRATION  
ENTER CODE  
ENTER CODE  
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Protection code  
To set a new PIN code (initial code 4321) open the System Set-up Screen and,  
using the keys, select ENTER CODE and press ent. Using the numeric key-  
pad, enter the existing PIN (initial code 4321) and press ent to change the PIN  
code.  
SYSTEM SETUP  
CALIBRATION  
ENTER CODE  
ENTER CODE  
ENTER CODE  
CODE: 4321  
ENTER CODE  
Note:  
This procedure permanently changes the PIN code.  
Using the numeric key-pad, set the new code and press ent to store it.  
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3.6 Testing Modes  
Direct mode  
After switching on and self-test the display automatically changes to the DIRECT  
generation working screen. The related display shows the actual dry well  
temperature in large characters (from the internal or external probe), temperature  
set-point and a possible measurand (i.e. the last selections made).  
150.00  
BLK  
DIRECT  
148.00 °C  
The status bar shows the temperature set-point, the  
symbol (indicating a  
cooling or heating condition) and the generation mode. To set a new set-point value  
and generate a new temperature, use the numeric key-pad and press ent. The  
calibrator immediately activates the temperature regulator and the status bar shows  
the new set-point, with the  
symbol indicating the new heating or cooling  
condition. On reaching the new set-point, the RDY (ready) message replaces the  
symbol.  
150.00  
BLK  
RDY  
DIRECT  
150.00 °C  
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Step mode  
To set a STEP generation mode from the DIRECT mode display, press the # key  
(2nd function) and the  
as follows:  
key. The display shows the step function selection menu  
STEPS  
PROGRAM  
20%  
25%  
33%  
50%  
Using the  
keys, select the required percentage of temperature interval  
between each step or, depending on the application, program a variety of values.  
Fixed step selection  
STEPS  
PROGRAM  
20%  
25%  
33%  
50%  
Using the  
keys, select one of the standard percentage steps (20, 25, 33, and  
50%) and press ent. The following display allows the temperature range span to  
be set-up (e. g.), 0 to 100 %.  
20% STEPS  
0%  
100%  
=
=
0.00  
100.00  
°C  
°C  
Using the  
temperature values (0 and 100 %) and press ent. In the next working screen, use  
the keys to increase or decrease the temperature set-point with the selected  
percentage difference between each step.  
keys, move the selection cursor in vertical direction, set the required  
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The status bar shows the recalled percentage step, together with the related  
temperature set-point, the step symbol (  
symbols.  
) and the heating/cooling  
arrow  
20.00  
BLK:  
20%  
19.00 °C  
Programmable step selection  
From the display of step setting, select PROGRAM using the  
keys and press  
ent. The next display permits the temperature step size to be set-up (5 maximum).  
STEPS  
PROGRAM  
20%  
25%  
33%  
50%  
Using the  
keys select the number of step to be set and press ent. In the next  
display, move the selection cursor using the  
temperature value for each step.  
again and set a specific  
STEPS  
PROGRAMMED STEPS  
2
3
4
5
# 1  
# 2  
=
=
0.00  
100.00  
°C  
°C  
At the end of this operation, press ent to activate the standard working screen. Use  
the keys to increase/decrease the step value as described above for the fixed  
step capability.  
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Ramp mode  
The DBC series can generate temperature using programmable temperature ramp  
function. To set-up a ramp function from a Direct or Step working screen, press the  
# and 0 keys. The next display allows set-up of the ramp temperature limits and the  
required temperature gradient (°C/minute), to be used during the generation  
(maximum capability 10.0°C/minute).  
RAMP  
T min:  
T max: 100.00  
dt/ dT: 1.00  
0.00  
°C  
°C  
°C/ min  
Move the cursor in vertical direction using the  
keys and, using the numeric key-  
pad, set the start/finish ramp temperature values (T min and T max) and the  
required rate of change for the regulator. Pressing the ent key causes the working  
screen to be activated. Use the  
key to start ramp generation, starting at the  
actual dry well temperature and finishing at the T max value. Use the key to start  
a negative ramp function (actual dry well temperature to T min). The display shows  
the ramp direction, together with a corresponding heating/cooling symbol.  
60.00  
BLK:  
50.00  
°C  
To stop the ramp, press the  
shows the ramp symbol, the temperature set-point, the  
HOLD message (if the ramp has been stopped).  
key. Press the  
keys to restart. The status bar  
symbols and a  
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Preset values mode  
To set-up temperature generation from the standard working screen, using  
PRESET values, the user must assign a temperature set-point value to a specific  
numeric key on the key-pad. From the Direct/Step/Ramp working screen, press ce  
since the setting menu is already open. Select PRESET using the  
press ent.  
keys and  
SET MODE  
PRESET  
DIRECT  
# 1  
# 2  
# 3  
# 4  
# 5  
=
=
=
=
=
0.00  
0.00  
0.00  
0.00  
0.00  
°C  
°C  
°C  
°C  
°C  
PRESET  
STEPS  
RAMP  
The next display allows a specific temperature value to be assigned to each of the  
numeric keys (1 to 5) of the key-pad. Use the keys and the numeric key-pad  
to set the values. Press ent to leave the set-up display and to open the working  
screen.  
Pressing the # key followed by one of the numeric keys 1- 5 recalls the set-point  
assigned to the numeric key.  
Note:  
Ramp, Step and Preset functions can also be set starting from the Menu  
Selection Screen. In an active standard working screen, press the menu  
key to open the Menu Selection Screen and use the  
keys to select the  
required temperature reference from the REF. T display (see next section),  
and press ent. The following screen allows set-up of the Ramp, Step and  
Preset parameters.  
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3.7 Measuring an Input  
The DBC series has a dual display. By selecting a measurement (input) option from  
the menu using the  
keys and pressing ent, the working screen shows a dual  
display with the dry well temperature (at the bottom) and the selected input (at the  
top).  
Note:  
Leaving the MEASURE section of the Menu Selection Screen to NONE, the  
final working screen shows only the dry well temperature (with internal or  
external reference).  
To show the dry well temperature and a thermocouple input (DBC-TC only):  
Select from the menu screen REF .T and then INTERNAL.  
Using the  
keys, select from the menu screen MEASURE and then T/C.  
Press the ent key, to confirm and set the display.  
REF T.  
MEASURE  
T/ C  
K
23.8° C  
°C  
RDG: 148.50  
0.15% SPAN  
NONE  
INTERNAL  
SEL RTD  
150.00  
BLK  
DIRECT  
°C  
T/C  
RTD  
mA  
148.00  
Switch Test  
A switch test can be carried out by connecting the device under test to the electrical  
connections on the top side of the instrument (identified with the symbol).  
Select from the menu screen REF .T and then INTERNAL.  
Using the keys, select from the menu screen MEASURE and then  
Press the ent key, to confirm and set the display.  
.
DBC-TC  
DBC-TS  
REF T.  
MEASURE  
REF T.  
MEASURE  
NONE  
NONE  
INTERNAL  
SEL RTD  
INTERNAL  
SEL RTD  
T/C  
RTD  
mA  
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Selecting the Direct, Step or Preset generation mode, the final working screen  
shows the dry well temperature at the bottom (together with the temperature set-  
point, the generation mode and the status arrow symbol) and the contact state at  
the top (open/close). An audio signal indicates the change of state.  
SWITCH  
150.00  
BLK  
DIRECT  
°C  
148.00  
To enable the Switch Test with the indication of open, close and calculated  
hysteresis values, the Ramp generation mode must first be selected.  
SWITCH  
OPENED AT:  
CLOSED AT:  
HIST:  
145.50  
148.00  
2.50  
°C  
°C  
°C  
150.00  
BLK:  
148.00 °C  
The switch test function can be rapidly recalled from any working screen by  
pressing the # and +/- keys. Press these keys again to disable Switch Test and to  
recall only the dry well temperature measurement.  
Thermocouple Testing  
The DBC-TC series can measure the T/C electrical output, directly displaying the  
value in the selected temperature units.  
From the Menu Selection Screen, select the required dry well temperature  
reference into the REF. T display, move the selection cursor on the MEASURE  
section using the keys, select T/C using the  
keys and press ent.  
REF T.  
MEASURE  
NONE  
INTERNAL  
SEL RTD  
T/C  
RTD  
mA  
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After the SET MODE selection, a new display allows the T/C type definition.  
TYPE  
K
J
S
N
R
Using the  
keys, select the type of probe to be measured and press ent : the  
next display sets the compensation method for the T/C cold junction.  
COLD J.  
INTERNAL  
SET CJC  
• Internal  
This selection activates the internal CJ compensation mode. A temperature sensor  
fitted near the T/C electrical connection measures the CJ temperature and activates  
the compensation circuit.  
• Setting Cold Junction Compensation  
This sets the CJ compensation temperature reference to a programmable value  
between 0 to 70° C. The T/C reference table uses a CJ temperature of 0° C.  
SET CJC  
CJC °C: 24.2 °C  
Using the  
keys, select the required CJ compensation method and press ent.  
The display shows the mode settings (i.e. how the T/C measurement can be  
displayed).  
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MODE  
DIRECT  
CAL  
Direct  
This screen shows, in the top, a direct reading in the selected temperature unit,  
together with the T/C type and the CJ temperature. The bottom part of the screen  
shows, the generated temperature value (with internal or external reference), the  
temperature set-point, the status arrows symbols and the selected generation  
mode.  
T/ C  
K
23.8° C  
°C  
RDG: 148.50  
150.00  
BLK  
DIRECT  
°C  
148.00  
CAL Mode  
This facility performs an error calculation analysis for the unit under test. From the  
MODE display select CAL using the  
and press ent. The next display provides  
the setting of T/C span.  
SET SPAN  
T min : 50.00 °C  
T max : 200.00 °C  
Using the  
select the T min value and set the temperature limit using the  
numeric key-pad: then, move the cursor on the T max value using the  
key, set  
the related temperature value and press ent to confirm. Press ent again to show  
the next display, where the error calculation method can be set.  
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ERROR  
ABSOLUTE  
% OF SPAN  
% OF RDG  
Using the  
keys, select the required error calculation method and press ent.  
Absolute  
The display shows the error calculation as deviation in temperature measurement  
units between the reference temperature (internal or external) and the unit under  
test measurement.  
% of Span  
This selection gives an error calculation referenced to the full-scale value.  
T/ C  
K
23.8° C  
°C  
RDG: 148.50  
0.15% RDG  
150.00  
BLK  
DIRECT  
°C  
148.00  
The working screen shows, in the top part, the selected T/C type, the probe  
measure directly in the selected temperature unit, the CJ temperature and the error  
value.  
The bottom part of the screen shows, the generated temperature value (with  
internal or external reference), the temperature set-point, the status arrows symbols  
and the selected generation mode.  
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% of Reading  
This selection gives an error calculation referenced to a previously set, specific  
measuring point of the temperature span.  
T/ C  
K
23.8° C  
°C  
RDG: 148.50  
0.15% RDG  
150.00  
BLK  
DIRECT  
°C  
148.00  
The screen shows, in the top part, the selected T/C type, the probe measure directly  
in the selected temperature unit, the CJ temperature and the error value.  
The bottom part of the screen shows, the generated temperature value (with  
internal or external reference), the temperature set-point, the status arrows symbols  
and the selected generation mode.  
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RTD Measurements  
The DBC-TC series can measure the electrical output of RTD, displaying the value  
directly in the selected temperature unit.  
REF T.  
MEASURE  
NONE  
INTERNAL  
SEL RTD  
T/C  
RTD  
mA  
From the Menu Selection Screen, using the  
select RTD and press ent.  
After selection of the generation mode, a new display shows the RTD types that can  
be measured.  
TYPE  
Pt-100  
Pt-200  
Pt-500  
Pt-1000  
Ni-100  
Using the  
keys to select the required RTD type and press ent. After this  
operation, a new display sets the connection configuration (3 or 4 wires) of the  
probe under test.  
RTD  
3 WIRES  
4 WIRES  
Using the  
keys, select the required connection configuration and press ent.  
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The display shows the mode settings (i.e. how the RTD measurement can be  
displayed).  
MODE  
DIRECT  
CAL  
Direct  
This screen shows, in the top, a direct reading in the selected temperature unit,  
together with the RTD type and the temperature. The bottom part of the screen  
shows, the generated temperature value (with internal or external reference), the  
temperature set-point, the status arrows symbols and the selected generation  
mode.  
Pt-100  
RDG: 148.50  
0,15% SPAN  
°C  
150.00  
BLK  
DIRECT  
°C  
148.00  
CAL Mode  
This facility performs an error calculation analysis for the unit under test. From the  
MODE display select CAL using the  
and press ent. The next display provides  
the setting of RTD span.  
SET SPAN  
T min : 50.00 °C  
T max : 200.00 °C  
Using the  
select the T min value and set the temperature limit using the  
numeric key-pad: then, move the cursor on the T max value using the  
key, set  
the related temperature value and press ent to confirm. Press ent again to show  
the next display, where the error calculation method can be set.  
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ERROR  
ABSOLUTE  
% OF SPAN  
% OF RDG  
Using the  
keys, select the required method and press ent.  
Absolute  
The display shows the error calculation as deviation in temperature measurement  
units between the reference temperature (internal or external) and the unit under  
test measurement.  
% of Span  
This selection gives an error calculation referenced to the full-scale value.  
Pt-100  
RDG: 148.50  
0,15% SPAN  
°C  
150.00  
BLK  
DIRECT  
°C  
148.00  
The screen shows, in the top part, the selected RTD type, the probe measure  
directly in the selected temperature unit and the error value.  
The bottom part of the screen shows, the generated temperature value (with  
internal or external reference), the temperature set-point, the status arrows symbols  
and the selected generation mode.  
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% of Reading  
This selection gives an error calculation referenced to a previously set, specific  
measuring point of the temperature span.  
Pt-100  
RDG: 148.50  
0,15% RDG  
°C  
150.00  
BLK  
DIRECT  
°C  
148.00  
The screen shows, in the top part, the selected RTD type, the probe measure  
directly in the selected temperature unit and the error value.  
The bottom part of the screen shows, the generated temperature value (with  
internal or external reference), the temperature set-point, the status arrows symbols  
and the selected generation mode.  
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Current Measurements  
The DBC-TC series has an input section for direct measurement of mA signal, for  
example, from a DIN temperature transmitter, directly fitted on the probe under test.  
REF T.  
MEASURE  
NONE  
INTERNAL  
SEL RTD  
T/C  
RTD  
mA  
From the Menu Selection Screen, select mA using the  
and press ent. After  
selection of the required generation mode (DIRECT, PRESET, STEP, RAMP), the  
measure MODE display will be immediately recalled, allowing solution of how the  
mA measurement must be carried out.  
MODE  
DIRECT  
CAL  
Direct  
Use the  
keys and pressing ent, changes the display to the working screen.  
The top part of the working screen shows the mA electrical signal from the device  
under test (i.e. a temperature transmitter) and the bottom part, the usual generated  
temperature parameters.  
mA  
RDG: 20.00  
mA  
150.00  
BLK  
DIRECT  
°C  
148.00  
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CAL  
Use the  
keys and pressing ent, changes the display. The new display allows  
the setting of a temperature range to the specific mA output of the device under test.  
SET SPAN  
T min  
T max  
Min  
:
:
:
50.00 °C  
200.00 °C  
4. 000 mA  
20.000 mA  
Max  
:
Using the  
keys to move the cursor through this display and, using the numeric  
key-pad, set a low temperature limit (T min) corresponding to a low input current  
limit (Min) and a high temperature limit (T max) corresponding to the high input  
current limit (Max) and press ent to confirm the selection and to go to the next  
display where the error calculation method can be set, as previously described.  
Selecting ABSOLUTE, the final working screen shows, in the top part, the mA  
signal from the unit under test, scaled into the selected temperature unit with the  
error indication reported as deviation in temperature.  
Selecting % OF SPAN or % OF RDG the display shows the error as a percentage  
value of full-scale or as a percentage value of specific reading point.  
CAL mA  
RDG: 148.50  
0,15% SPAN  
°C  
150.00  
BLK  
DIRECT  
148.00  
°C  
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Voltage Measurements (high level)  
The DBC-TC series can measure a voltage signal from temperature transmitters  
under test.  
REF T.  
MEASURE  
mV  
Ohm  
V
INTERNAL  
SEL RTD  
From the Menu Selection Screen, select V in the MEASURE section using the  
keys and press ent. After selection of the temperature generation mode to be used,  
the next display allows set-up of the voltage measurement method.  
MODE  
DIRECT  
CAL  
Direct  
Use the  
keys and pressing ent, changes the display to the working screen.  
The top part of the working screen shows the voltage signal from the unit under test  
in the top part and the parameters of the generated temperature in the bottom part.  
VOLT  
RDG: 10.00  
V
150.00  
BLK  
DIRECT  
°C  
148.00  
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CAL  
Use the  
keys and pressing ent, changes the display. The new display allows  
the setting of a temperature range to the specific voltage output of the device under  
test.  
SET SPAN  
T min  
T max  
Min  
:
:
:
50.00 °C  
200.00 °C  
0
V
V
Max  
:
10.000  
Using the  
keys, move the cursor through this display and set the values with  
the numeric key-pad: T min value is the low limit for the UUT temperature range,  
related to its low limit output voltage, T max is the full-scale for the UUT temperature  
range, related to the high limit of its output voltage. Press ent to confirm and to go  
to the next display, where the error calculation mode can be set.  
ERROR  
ABSOLUTE  
% OF SPAN  
% OF RDG  
Using the  
keys, select ABSOLUTE and press ent: the final working screen  
shows the generated temperature parameters in the bottom part of the display, and  
the voltage measurement scaled into the selected temperature unit in the top part.  
The error (deviation) calculation is shown with small digit between the two sections  
of the display and with a temperature unit value.  
If in the ERROR screen, using the  
keys, the % OF SPAN or % OF RDG  
functions are selected, pressing the ent key, the final working screen shows the  
error calculation as a percentage deviation related to the full-scale of the device  
under test temperature range or to its specific measuring point.  
CAL VOLT  
RDG: 148.50  
0,15% SPAN  
°C  
150.00  
BLK  
DIRECT  
148.00  
°C  
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Voltage Measurements (low level)  
The DBC-TC series can measure the low level signal from a thermocouple device  
under test: using this capability, the operator can make a direct verification of the  
electrical behaviour for the T/C under test.  
REF T.  
MEASURE  
mV  
Ohm  
V
INTERNAL  
SEL RTD  
From the Menu Selection Screen, select mV using the  
keys and press ent.  
After the usual selection of the temperature generation mode to be used (Direct,  
Ramp, Preset or Step), the final working screen will be immediately recalled  
showing the generated temperature parameters in the bottom part of the display  
and the measured millivolt value in the top part of it.  
mV  
RDG: 80.00  
mV  
150.00  
BLK  
DIRECT  
°C  
148.00  
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Resistance Measurement  
The DBC-TC series can directly measure the resistance value of an RTD under test.  
REF T.  
MEASURE  
mV  
Ohm  
V
INTERNAL  
SEL RTD  
From the Menu Selection Screen, select Ohm in the MEASURE section using the  
keys and press ent. After selection of the temperature generation mode,  
the next display sets the connected RTD as a 3 or 4 wire device.  
RTD  
3 WIRES  
4 WIRES  
Using the  
select the required connection and press ent. The final working  
screen shows the generated temperature in the lower part of the display and the  
measured Ohmic value in the top part.  
Ohm  
RDG: 138.50  
150.00  
BLK  
DIRECT  
°C  
100.00  
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4
SERIAL COMMUNICATION  
Using the standard digital RS232 interface, the calibrator can be controlled from a  
remote computer. By sending commands via the RS232 interface, the calibrator  
automatically retrieves temperature readings or modifies any parameter settings  
(temperature set-point, temperature reference selection, ramp/step/preset  
generation etc.).  
4.1 DBC Series - Serial Commands Protocol  
ABBREVIATIONS:  
Two digit DBC address in ASCII format. (i.e.. 01).  
Send 00 to overwrite every other address.  
aa:  
Parameter. Command depending format.  
Read and Write command  
par:  
R/W:  
R:  
Read Only command  
Not Applicable  
n.a.:  
[ ]:  
Every parameter enclosed in square bracket are optional  
Command  
Flow  
Model  
(TS/TC)  
Command  
Parameters  
Description  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
*aaEM=par  
*aaEM?  
!aaEM=par  
n.a.  
Par = 0 Absolute error °C  
1% of span  
2% of readings  
Par = floating point  
R/W - Error Computation Mode  
(MM command to set CAL mode)  
TC  
TC  
TC  
TC  
R – Get Error Value  
(Mode selected by EM command)  
*aaER?  
!aaER=par  
*aaICc=par  
*aaICc?  
c =1 Regulator (optional)  
2 Measure  
par = 0 NONE  
1 n.a.  
R/W –Input Channel  
No measure  
TS  
TC  
TS  
!aaICc=par  
2 T/C +CJ  
3 T/C no CJ  
4 RTD 3 Wires  
5 RTD 4 Wires  
6 RES 3 Wires  
7 RES 4 Wires  
8 mV  
Thermocouple + Cold Junction  
Thermocouple without Cold Junct.  
Thermoresistors 3 wires  
Thermoresistors 4 wires  
Resistors up to 400 3 wires  
Resistors up to 400 4 wires  
mV input  
TC  
TC  
TS/TC  
TS/TC  
TC  
TC  
TC  
9 n.a.  
10 n.a.  
11 n.a.  
12 mA  
mA input  
TC  
13 n.a.  
14 Switch  
15 n.a.  
Switch mode  
TS/TC  
16 n.a.  
TS/TC  
TS/TC  
TC  
17 Reference RTD 4 wires User Thermoresistors 4 wires  
18 V Volt Input  
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Command  
Flow  
Write  
Read  
Model  
(TS/ TC)  
Command  
n.a.  
Parameters  
Description  
*aaIRc?  
c = 1 Reference RTD  
2 Measure  
R – Get Input Measure value  
TS/TC  
TC  
Query  
Write  
Read  
Query  
!aaIRc= par  
*aaISc=par  
*aaISc?  
par = floating point value  
c = 1 Reference RTD  
2 Measure  
R/W –Sensor type  
No sensor  
TS/ TC  
TC  
TS/TC  
TS/TC  
TC  
TC  
TC  
TC  
TC  
!aaISc=par  
par = 0 NONE  
10 PT100 IEC  
11 PT200 IEC  
12 PT500 IEC  
13 PT1000 IEC  
16 Ni100 DIN  
19 Reference RTD  
20 T/C B IEC  
21 T/C E IEC  
22 T/C J IEC  
TC  
TC  
TC  
23 T/C K IEC  
24 T/C N IEC  
25 T/C R IEC  
26 T/C S IEC  
27 T/C T IEC  
TC  
TC  
TC  
TC  
TC  
28 T/C U DIN  
29 T/C L DIN  
TC  
TC  
30 T/C C  
TC  
Write  
Read  
Query  
Write  
Read  
Query  
*aaCJ[1]=par par = Floating Point  
*aaCJ[1]?  
!aaCJ[1]=par  
R/W –Manual Cold Junction Value  
(Value in current Temperature Units)  
TC  
*aaIUc=par  
*aaIUc ?  
!aaIUc=par  
c = 1 Reference RTD  
2 Measure  
par =98 NONE  
80 °F  
R/W –Input Units  
TS/ TC  
TC  
Unit n.a  
Fahrenheit  
Celsius  
Kelvin  
Milliampere  
Volts  
TS/ TC  
TS/ TC  
TS/ TC  
TS/ TC  
TC  
81 °C  
82 °K  
60 mA  
61 V  
TC  
62 mV  
63 Ω  
Millivolts  
Ohms  
TC  
TC  
TC  
Write  
Read  
Query  
*aaKB[1]=par par = 0 silent keyboard  
R/W –Keyboard bid  
TS/ TC  
*aaKB[1]?  
1 beep on  
!aaKB[1]=par  
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Command  
Flow  
Model  
(TS/TC)  
TS/TC  
Command  
Parameters  
Description  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
*aaKM[ 1]= par par = 0 keys disabled  
R/ W – Local lockout keyboard  
*aaKM[ 1]?  
!aaKM[ 1]= par  
*aaMRc= par  
*aaMRc?  
!aaMRc= par  
*aaMM= par  
*aaMM?  
!aaMM= par  
*aaOM[ 1]= par par = 0 Direct mode  
*aaOM[ 1]?  
!aaOM[ 1]= par  
1 keys enabled  
c = 1 zero scale  
R/ W – Measure Range  
(mA or V in CAL ERROR mode)  
TC  
TC  
2 full-scale  
par = floating point value  
par = 0 Direct mode  
1 Cal mode  
R/ W – Measurement mode  
R/ W – Output mode  
TC  
TC  
TS/TC  
TS/TC  
TS/TC  
TS/TC  
TS/TC  
1 Preset mode  
2 Steps mode  
3 Ramp mode  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
*aaOP[ 1]= par  
*aaOP[ 1]?  
!aaOP[ 1]= par  
n. a.  
*aaOR[ 1]?  
!aaOR[ 1]= par  
*aaPB[ 1]= par  
*aaPB[ 1]?  
par = floating point value R/ W – Point Temperature  
R – Read Controlled Temperature  
TS/TC  
TS/TC  
par = 0 to 99.9  
floating point value  
R/ W – Proportional band  
!aaPB[ 1]= par  
*aaPSc= par  
*aaPSc?  
par = floating point value R/ W – Preset Set Values  
c = 1 preset step #1  
TS/TC  
TS/TC  
TS/TC  
TS/TC  
TS TC  
!aaPSc= par  
2 preset step #2  
3 preset step #3  
4 preset step #4  
5 preset step #5  
Write  
Read  
Query  
Write  
Read  
Query  
TS/TC  
TS/TC  
*aaRIc?  
c = 1 Model  
2 Software Version  
par = 0 Ramp Down  
1 Ramp Up  
R – Read Model and Software Version.  
R/ W – Ramp mode  
!aaRIc= par  
*aaRM[ 1]= par  
*aaRM[ 1]?  
!aaRM[ 1]= par  
2 Down Hold  
3 Up Hold  
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Command  
Flow  
Model  
(TS/TC)  
TS/TC  
Command  
*aaRRc= par  
Parameters  
Description  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
par = floating point  
c = 1 zero scale  
2 full-scale  
R/W – Ramp Range  
*aaRRc?  
!aaRRc= par  
*aaRS[ 1]= par  
*aaRS[ 1]?  
!aaRS[ 1]= par  
*aaSA[ 1]= par  
*aaSA[ 1]?  
!aaSA[ 1]= par  
*aaSL[ 1]= par  
*aaSL[ 1]?  
par r = floating point  
R/W – Ramp Slope  
R/W – Station Address  
R/W – Language  
TS/TC  
TS/TC  
TS/TC  
par = 1 to 99  
!aaSL[ 1]= par  
par = 0 ENGLISH  
1 FRENCH  
2 GERMAN  
3 ITALIAN  
4 PORTUGUESE  
5 SPANISH  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
n.a.  
*aaSN[ 1]?  
!aaSN[ 1]= par  
*aaSP[ 1]= par  
*aaSP[ 1]?  
!aaSP[ 1]= par  
*aaSWc= par  
*aaSWc?  
R – Serial Number  
TS/TC  
TS/TC  
par = 1 to 65535  
par = 1 to 5 - # of step  
R/W – Number of preset step  
par = floating point  
R – Switch test threshold  
TS/TC  
!aaSWc= par  
c = 1 – Opened  
2 – Closed  
3 - Hysteresis  
par = 1 to 255  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
Write  
Read  
Query  
*aaTD[ 1]= par  
*aaTD[ 1]?  
!aaTD[ 1]= par  
*aaTI[ 1]= par  
*aaTI[ 1]?  
!aaTI[ 1]= par  
*aaTU[ 1]= par  
*aaTU[ 1]?  
!aaTU[ 1]= par  
*aaTRc= par  
R/W – Derivative constant  
R/W – Integration constant  
R/W – Temperature units  
TS/TC  
TS/TC  
TS/TC  
TC  
par = 1 to 255  
par = 80 °F  
81 °C  
82 °K  
par = floating point value R/ W – Temperature Range  
*aaTRc? !aaTRc= par c = 1 low scale  
2 full-scale  
(CAL ERROR mode)  
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Command  
Flow  
Write  
Read  
Query  
Model  
(TS/TC)  
Command  
n. a.  
*aa. Ac?  
!aa. Ac= par  
Parameters  
Description  
par = floating point  
c = 1 regulator channel  
2 n. a.  
R – Get cold junctions compensation TS/TC  
3 calibrator board  
Write  
Read  
Query  
n. a.  
*aa. Mc?  
!aa. Mc= par  
par = Exp. floating point  
c = 1 regulator temp.  
2 REF Probe temp.  
3 calibrator value  
R – Not averaged measures  
(diagnostic purposes)  
TS/TC  
TS/TC  
Write  
Read  
Query  
n. a.  
*aa. Pc?  
!aa. Pc= par  
par = Exp. floating point  
c = 1 reg. Sensor mV out  
R – Main measures  
2 REF sensor mV out (diagnostic purposes)  
3 Cal. Electrical value.  
Write  
Read  
Query  
Write  
Read  
Query  
*aaRN = par  
*aaRN?  
!aaRN = par  
n.a.  
*aaST?  
!aaST = par  
par = integer  
Reference RTD selection  
TS/TC  
TS/TC  
0 = REF 1  
1 = REF 2  
par = integer  
Status of controller  
0 = Cooling  
1 = Heating  
2 = Ready  
Write  
Read  
Query  
*aaCN = par  
*aaCN?  
!aaCN = par  
par = integer  
Select display contrast  
TS/TC  
0 = 10%  
1 = 30%  
2 = 50%  
3 = 70%  
4 = 90%  
5 = 100%  
par = floating  
c = 1 REF 1  
c = 2 REF 2  
Write  
Read  
Query  
*aaURc = par  
*aaURc?  
!aaURc = par  
Ref probe R0 coefficient  
Ref probe A coefficient  
Ref probe B coefficient  
Ref probe C coefficient  
Ref probe tag number  
TS/TC  
TS/TC  
TS/TC  
TS/TC  
TS/TC  
Write  
Read  
Query  
*aaUAc = par  
*aaUAc?  
!aaUAc = par  
par = floating  
c = 1 REF 1  
c = 2 REF 2  
Write  
Read  
Query  
*aaUBc = par  
*aaUBc?  
!aaUBc = par  
par = floating  
c = 1 REF 1  
c = 2 REF 2  
Write  
Read  
Query  
*aaUCc = par  
*aaUCc?  
!aaUCc = par  
par = floating  
c = 1 REF 1  
c = 2 REF 2  
Write  
Read  
Query  
*aa. Tc  
*aa. Tc?  
!aa. Tc= par  
par = integer  
c = 1 REF 1  
c = 2 REF 2  
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5
CALIBRATION  
The DBC series of temperature calibrators must be considered as reference  
standard: these instruments must be periodically tested and calibrated with a  
recommended recalibration period of 12 months. The Service Centres of GE  
provide a global calibration service to National and International standards.  
Calibration must be carried out by the suitably qualified calibration technicians. The  
calibration procedure requires a high-accuracy reference standard (at least 5 times  
better than the DBC accuracy) with direct traceability to National or International  
Standard (SIT, UKAS etc.).  
Press the # and the menu keys to select the set-up display.  
SYSTEM SETUP  
CALIBRATION  
ENTER CODE  
ENTER CODE  
Use the  
keys to select CALIBRATION and press ent.  
Important Note  
A PIN code protects the calibration facility from unauthorised use. Each instrument,  
on delivery, contains the factory set PIN (4321). To continue protecting the  
calibration facility, the PIN code should be changed as soon as possible.  
Enter the correct PIN at the ENTER CODE prompt and press ent. After entering  
the PIN number, calibrate the instrument by following the on-screen instructions.  
CALIBRATION  
REF. RTD INPUT  
REF. RTD  
BLOCK CALIBRATION  
mV (1)  
mV (2)  
Calibration of the standard Reference Probe Input  
In the calibration menu, using the cursor keys select the REF. RTD INPUT and  
press ent. The display enables the setting of the resistance test value (true value).  
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Using a decade resistance box, generate the required value (to the Ref. Probe  
connection on the electrical panel) and press ent. The microprocessor combines  
the two values automatically. The nominal value is the value recommended for the  
test.  
REF. RTD INPUT  
Nominal value:  
300  
True value:  
Reading:  
300.00  
298.50  
Press ENT or CE ...  
Calibration of the external Reference Probe (DBC-TS and DBC-TC)  
By selecting the REF RTD from the calibration menu and pressing ent, a new  
display opens to set all the parameters needed for the connected Reference RTD  
(Tag number, R0 values, coefficients).  
REF RTD  
Tag:  
R0:  
A:  
B:  
100.00  
3.9080e-03  
-5.8020e-07  
-4.1830e-12  
C:  
Move the cursor with the  
keys and set the value with the numeric key-pad. In  
this way, a characterisation of the specific Reference Probe can be made. Press  
ent to return to the calibration menu.  
Calibration of the internal dry well Sensor (DBC-TS and DBC-TC)  
Note: Starting this procedure after at least 1 hour of warm-up, achieves a better  
accuracy.  
CALIBRATION  
SET 1:  
REF 1:  
SET 2:  
REF 2:  
SET 3:  
50.00  
50.00  
300.00  
300.00  
400.00  
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1
To calibrate the dry well regulation, install a suitable reference probe in the  
dry well and connect it to the Reference Probe socket in the front panel.  
2
3
Follow the above procedure to insert the coefficients of the probe in use.  
Change from INTERNAL to SEL RTD, Direct mode. The display shows the  
temperature measured by the Reference Probe.  
4
5
Select the CALIBRATION menu and use the PIN to enter the menu. Record  
the values of SET1 ...SET4, and REF1 ... REF4.  
Set the dry well temperature at SET1 value; wait at least 30 minutes at this  
temperature. Record the true temperature value on display, identify this  
value as READ1.  
6
Set the dry well temperature at SET2 value; wait at least 30 minutes at this  
temperature. Record the true temperature value on display, identify this  
value as READ2. Repeat this procedure for SET3 and SET4 and record  
values READ3 and READ4.  
7
8
Enter the Calibration menu, select dry well CALIBRATION.  
Calculate the NEWREF1 ... NEWREF4 value as follow: NEWREFx= READx-  
SETx+REFx.  
9
Type in REF1 ...REF4 fields the values NEWREF1 ...NEWREF4.  
Press ENTER. DBC650 (150) automatically calculates the coefficients.  
The calibration of the dry well temperature regulator has been completed.  
10  
11  
Calibration of the millivolt input ranges (DBC-TC only)  
The DBC-TC series has four different millivolt input ranges to be calibrated,  
depending on the type of thermocouple measurements available, the calibration  
procedure is the same.  
CALIBRATION  
REF. RTD INPUT  
REF. RTD  
BLOCK CALIBRATION  
mV (1)  
mV (2)  
From the CALIBRATION menu select one of the mV input range to be calibrated  
using the  
and press ent.  
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mV (1)  
Using a certified and high accuracy millivolt simulator, generate a millivolt signal to  
the T/C electrical connection on the front panel (nominal value is the recommended  
value for the calibration): pressing the ent key causes the microprocessor to  
combine the millivolt values (true value and effective reading).  
Calibration of the Volt input range (DBC-TC only)  
From the CALIBRATION display, select V INPUT using the  
keys and press  
ent.  
V INPUT  
Using a certified and high accuracy Volt simulator, apply the calibration signal to the  
Voltage electrical connection on the front panel of the instrument (the nominal value  
is the recommended value for the test).  
Pressing the ent key causes the microprocessor to combine the voltages indication  
(True value and Reading).  
Calibration of the mA input range (DBC-TC only)  
From the CALIBRATION display, select mA INPUT using the  
ent.  
keys and press  
mA INPUT  
Using a traceable and high accuracy mA simulator, generate a specific current  
value to the related electrical connection on the front panel of the instrument (the  
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Nominal Value is the recommended value for the test): pressing the ent key causes  
the microprocessor to combine the current indications on the display (True Value  
and Effective Reading).  
Calibration of the resistance (Ohm) input ranges (DBC-TC only)  
As for the millivolt input range, also the resistance measurement channel has  
different ranges capability, depending on the RTD measurement available.  
CALIBRATION  
Ohms INPUT  
1 KOhms INPUT  
From the CALIBRATION menu select the required Ohms input range to be  
calibrated, using the  
keys, and press ent.  
Ohms INPUT  
Nominal value:  
300  
True value: 300.00  
Reading: 298.00  
Press ENT or CE ...  
Using a certified and high accuracy Ohms simulator, apply the required value to the  
related electrical connection on the front panel of the instrument (the nominal value  
is the recommended value for the test).  
Pressing the ent key causes the microprocessor to combine the resistance  
measure on the display (true value and effective reading).  
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6
FAULT FINDING  
Fault description  
The instrument does not  
work even if the power  
cord is correctly fitted and - faulty power switch  
the mains switch is in the  
Possible problem  
- faulty protection fuse  
- faulty power cable  
Solution  
-Replace the fuse  
-Replace the power cable  
-Contact your service representative  
1.  
correct position.  
-Contact your service representative  
-Contact your service representative  
2.  
3.  
When the instrument is  
turned on the fuse blows - faulty power switch  
The heating and cooling  
- short circuit on power supply card  
- faulty power supply card  
function of the dry well is - faulty controller card  
not working  
- damage to one or more Peltier cells  
- faulty controller card  
-Contact your service representative  
4.  
The controller is not  
disabled when the set-  
point is reached  
5.  
6.  
The heating and cooling  
-damage to one or more Peltier cells or -Contact your service representative  
times out of specification. damage to the heating system  
Fan system not working. -faulty power supply card  
-faulty controller card  
-Contact your service representative  
-faulty fan  
-Change the step or preset values  
-Contact your service representative  
7
At high temperatures the -incorrect step or preset values  
instrument cannot  
stabilize.  
-faulty reference probe  
Note:  
Fuses are designed to give maximum protection in case of fault. Make sure  
that voltage selector and fuses are selected for the nominal working value.  
K400 Issue No. 1  
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7
MAINTENANCE  
7.1 CLEANING INSTRUCTIONS  
1
2
Wait until the instrument is at ambient temperature before cleaning.  
Disconnect the instrument from the power supply and clean the keyboard  
and case with a damp cloth, using a little mild detergent.  
CAUTION:  
DO NOT, under any circumstances, use any form of solvent for cleaning  
purposes. Using solvent damages the case.  
54  
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8
TECHNICAL SPECIFICATION  
8.1 Standard Specification  
DBC 150-TC and TS  
DBC 650-TC and TS  
50°C to 650°C  
dry well 160mm (6.3in)  
insertion depth 155mm (6.1in)  
30mm (1.18in)  
Temperature range  
Well depth  
-45°C (from ambient) to +150°C  
dry well 160mm (6.3in)  
insertion depth 155mm (6.1in)  
30mm (1.18in)  
Well diameter  
Stability  
0.03°C  
0.05°C (between 70°and 650°C)  
0.15°C (between 50°and 70°C)  
0.25°C  
Radial Uniformity  
(adjacent holes)  
Heating time  
0.15°C  
14 minutes (20°C to 120°C)  
22 minutes (25°C to -20°C)  
22 minutes (25°C to 650°C)  
27 minutes (600°C to 100°C with  
optional cooling probe)  
0.01°C  
Cooling time  
Display resolution  
0.01°C  
CJ compensation error  
Reference probe accuracy  
Power supply  
0.3°C  
0.3°C  
0.2°C (including B1probe)  
100-120 or 220-240 Vac,  
50-60 Hz, 230 VA  
DBC 150 TC only  
35 mA  
0.3°C (including B2 probe)  
100-120 or 220-240 Vac,  
50-60 Hz, 1385 VA  
DBC 650 TC only  
35 mA  
Maximum mA IN (current signal)  
Maximum V IN (voltage signal)  
30 Vdc  
30 Vdc  
8.2 Common specification  
Display area  
Temperature units  
60 x 40mm (2.36 x 1.57 in) LCD with backlighting  
°C  
K
°F  
External Ref. Probe  
Switch Test  
Communication Interface  
Software function  
Operating temperature range  
Reference Standards  
Facility for connection of a PT100 reference probe  
Facility for connection of switch contacts  
RS232, supplied as standard  
Ramp, step and preset temperature generation. Switch test  
10 to 50°C  
PT 100 EN 60751: 1998-05 (ITS 90)  
EN 60584-1: 1997-10  
{DBC-TC only} Thermocouples EN 60584-2: 1998-02  
Conformity Standards  
EMC EN 61326 (1997) + A1(1998) + A2 (2001)  
Safety EN 61010-1: 2001 (2nd edition)  
I (all measurement terminals MAX 30V to earth)  
2
Measurement Category  
Pollution degree  
Regulation sensor  
Weight  
Thermocouple  
9.5 kg (21 lbs)  
Dimensions  
322 x 156 x 328mm (12.7 x 6 x 12.9 in)  
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8.2 Electrical Input Specifications  
DBC-TC models  
Accuracy  
(90 days)  
Accuracy  
(1 year)  
Input  
Range  
Resolution  
PT100  
-99 /+750°C  
-99 /+750°C  
-99 /+750°C  
-99 /+550°C  
-60 /+250°C  
0.01°C  
0.04°C  
0.1°C  
0.1°C  
0.1°C  
0.05°C  
0.15°C  
0.3°C  
0.3°C  
0.3°C  
0.15°C  
PT200  
PT500  
PT1000  
Ni100  
0.1°C  
0.1°C  
0.1°C  
0.01°C  
T/C K  
T/C J  
T/C S  
-99 /+990°C  
-99 /+990°C  
-50 /+100°C  
100 /+990°C  
-99 /+990°C  
-50 /+100°C  
100 /+990°C  
200 /+500°C  
500 /+990°C  
0 /+990°C  
-99 /+990°C  
-99 /+400°C  
-99 /+800°C  
800 /+900°C  
-99 /+50°C  
-50 /+0°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.1°C  
0.3°C  
0.2°C  
0.1°C  
0.3°C  
0.2°C  
0.8°C  
0.5°C  
0.2°C  
0.1°C  
0.1°C  
0.1°C  
0.3°C  
0.2°C  
0.1°C  
0.1°C  
0.3°C  
0.3°C  
0.3°C  
1°C  
0.6°C  
0.3°C  
0.9°C  
0.6°C  
2.5°C  
1.5°C  
0.6°C  
0.3°C  
0.3°C  
0.3°C  
0.9°C  
0.6°C  
0.3°C  
0.3°C  
0.9°C  
T/C N  
T/C R  
T/C B  
T/C C  
T/C E  
T/C T  
T/C L  
T/C U  
0 /+500°C  
500 /+600°C  
Volts  
mV  
mA  
0 /+12V  
0.001V  
0.01%RDG+0.01%FRO  
0.03%RDG+0.03%FRO  
0 /+79.2mV  
0 /+24mA  
0 /+400ߟ  
0.001mV  
0.001mA  
0.01ߟ  
0.003%RDG+0.002%FRO 0.01%RDG+0.006%FRO  
0.005%RDG+0.005%FRO 0.015%RDG+0.015%FRO  
0.003%RDG+0.003%FRO 0.01%RDG+0.01%FRO  
Ohm  
1.  
2.  
3.  
T/C and RTD accuracy includes electrical and conversion table uncertainty.  
T/C Total accuracy not including CJ compensation.  
RTD Total accuracy measured @ 0.2 mA excitation.  
56  
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Approved service agents:  
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