GE DRUCK DBC K400 User Manual

GE Infrastructure

Sensing

Druck DBC 150/650 Series

Dry block temperature calibrator

User manual - K400

[EN] English 1 ..... 56

[FR] French TBA [DE] German TBA [IT] Italian TBA [PT] Portuguese TBA [ES] Spanish TBA

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.

K400 Issue No. 1 i

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 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.

3 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.

K400 Issue No. 1 ii

Safety Instructions

This

instrument

During operation observe the following safety instructions:

1 USE the instrument in vertical position only.

2 DO NOT place any object on the protection grid of the dry well.

3 DO NOT put any liquid into the dry well and/or on the inserts.

4 DO NOT use fluids to clean the dry well and/or the inserts.

5 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 Before use, REMOVE all traces of contamination from the device

under test.

11 During normal operation, this instrument could reach high

temperatures.

12 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.

should only be used by suitably qualified * technicians

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 in inch mA milliampere mm millimetre mV millivolt RDG reading RTD Resistive Temperature Device T/C Thermocouple V Volt TC Temperature Calibrator TS Temperature Source

K400 Issue No. 1 iii

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

3OPERATION...................................................................... ..........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

K400 Issue No. 1 iv

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

K400 Issue No. 1 v

4.1 DBC Series - Serial Commands Protocol .......................... ..........43

5 CALIBRATION .................................................................. ..........48

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 FAULT FINDING ............................................................... ..........53

7 MAINTENANCE................................................................. ..........54

7.1 Cleaning Instructions.......................................................... ..........54

8 TECHNICAL SPECIFICATION ......................................... ..........55

8.1 Standard Specification........................................................ ..........55

8.2 Common Specification ....................................................... ..........55

8.3 Electrical Input Specification (DBC-TC models)................ ..........56

K400 Issue No. 1 vi

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.

K400 Issue No. 1 vii

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.

K400 Issue No. 1 viii

1INTRODUCTION

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

K400 Issue No. 1 1

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

1 2 3 4

6 7

9 10 11 12

14 15 16

Dry well with insert Protection grid 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

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) Main power selector 100 - 120 Vac and 220 - 240 Vac, 50/60 Hz

Power supply on/off switch 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 Digital display with Multi-language user interface

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)

2 K400 Issue No. 1

DBC-TS

Figure 1-1

K400 Issue No. 1 3

2INSTALLATION

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:

EFORE 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:

2.3 Temperature Probes

WARNING

The temperature probe to be tested must be correctly placed in the dry well to produce accurate test results:

HE POWER SUPPLY MUST PROVIDE CONNECTION TO A PROTECTIVE GROUND

TERMINAL.

HE INSTRUMENT MUST, AT ALL TIMES, BE CONNECTED TO THE SUPPLY EARTH

(

GROUND).

AFTER USE, THE PROBES WILL BE VERY HOT. HANDLE WITH CARE AND WAIT FOR THE PROBES TO COOL COMPLETELY.

• 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 K400 Issue No. 1

• When testing a probe with a certified reference probe, place both probes close together and at the same depth.

insert

Reduction

YES

160mm

Internal reference probe

zone

Calibration

NO YES

* 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.

K400 Issue No. 1 5

2.4 Electrical Connections

• Connection of a Thermocouple sensor

V IN

24V Out 35mA max

Ref RTD

X MTR

CAT I

max 30V

35mA max

mA IN

• Use of screw connections for T/C wires

6 K400 Issue No. 1

• Connection of a 3-wire RTD.

X MTR

24V Out 35mA max

CAT I

max 30V

35mA max

V IN

mA IN

• Connection of a 4-wire RTD

X MTR

24V Out 35mA max

CAT I

max 30V

35mA max

V IN

mA IN

Ref RTD

• Connection of a 2-wire T/I transmitter

V IN

24V Out 35mA max

(external 24 V dc excitation)

Ref RTD

X MTR

CAT I

max 30V

35mA max

mA IN

0V user supply (SELV)

K400 Issue No. 1 7

24V user supply floating (SELV)

• Connection of a 2-wire T/I transmitter

(with 24 V dc auxiliary excitation)

X MTR

24V Out 35mA max

Ref RTD

CAT I

max 30V

35mA max

V IN

mA IN

• 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 is considered as reference value and is shown on the DBC display: this temperature is measured with the standard internal probe.

Unit under Test

Dry Well

Internal Temperature Probe

8 K400 Issue No. 1

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 Wel

Internal Temperature Probe

K400 Issue No. 1 9

Power, reading and calibration of devices under test (

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.

DBC-TC only)

• External probe connections

1 Wire 1 2 Wire 1a 3 Wire 2 4 Wire 2a

10 K400 Issue No. 1

3OPERATI0N

3.1 Key-pad Functions

info direct

help

+/-

setup

ent

• 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).

K400 Issue No. 1 11

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