Fluke 741B User manual
®
741B/743B
Documenting Process Calibrator
Users Manual
PN 644788
June 1997 Rev.1, 3/98
© 1997, 1998 Fluke Corporation. All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.
LIMITED WARRANTY & LIMITATION OF LIABILITY
Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is three years and be-
gins on the date of shipment. Parts, product repairs and services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer
of a Fluke authorized reseller, and does not apply to fuses, disposable batteries or to any product which, in Fluke’s opinion, has been misused, altered, neglected
or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that software will operate substantially in accordance with its functional
specifications for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant that software will be error free or operate without
interruption.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different
warranty on behalf of Fluke. Warranty support is available if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable interna-
tional price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product purchased in one country is submitted for
repair in another country.
Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price, free of charge repair, or replacement of a defective product which is re-
turned to a Fluke authorized service center within the warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center or send the product, with a description of the difficulty, postage and insurance
prepaid (FOB Destination), to the nearest Fluke authorized service center. Fluke assumes no risk for damage in transit. Following warranty repair, the product will
be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that the failure was caused by misuse, alteration, accident or abnormal condi-
tion of operation or handling, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work. Following repair, the product
will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR
ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER ARISING FROM
BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY OTHER THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the
limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court of competent
jurisdiction, such holding will not affect the validity or enforceability of any other provision.
Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett WA 98206-9090 5602 B.D.
U.S.A Eindhoven, The Netherlands
5/94
i
Table of Contents
Title Page
Introduction....................................................................................................................1
Standard Equipment...................................................................................................... 4
Safety Information......................................................................................................... 7
Getting Started Exercise ............................................................................................... 10
Operating Features ....................................................................................................... 12
Input and Output Jacks............................................................................................. 12
Keys ........................................................................................................................ 14
Display...................................................................................................................... 17
Setting Up the Calibrator............................................................................................... 19
Using the Strap and Bail........................................................................................... 19
Charging the Battery................................................................................................. 20
Battery Life ............................................................................................................... 22
Preserving Battery Life ............................................................................................. 23
Using the Optional Battery Eliminator....................................................................... 23
Selecting the Display Language............................................................................... 24
Adjusting the Display Contrast.................................................................................. 24
741B/743B
Users Manual
ii
Displaying the Date and Time................................................................................... 24
Using the Backlight ................................................................................................... 26
Personalizing the Calibrator...................................................................................... 26
Using Measure Mode..................................................................................................... 28
Measurement Ranges............................................................................................... 28
Measuring Electrical Parameters.............................................................................. 28
Testing Continuity ..................................................................................................... 30
Measuring Pressure.................................................................................................. 30
Measuring Temperature............................................................................................ 34
Using Thermocouples .......................................................................................... 34
Using Resistance-Temperature Detectors (RTDs)............................................... 37
Measurements in Percent of Scale ........................................................................... 41
Linear-Output Transmitters .................................................................................. 41
Square-Law Process Variables............................................................................ 41
Customizing mV Input Units...................................................................................... 42
Damping Your Measurements................................................................................... 43
Using Source Mode ....................................................................................................... 44
Sourcing Electrical Parameters................................................................................. 44
Simulating a 4 to 20 mA Transmitter......................................................................... 46
Supplying Loop Power.............................................................................................. 48
Sourcing Pressure..................................................................................................... 50
Simulating Thermocouples........................................................................................ 53
Simulating RTDs....................................................................................................... 54
Sourcing in Percent of Scale..................................................................................... 57
Linear-Responding Transmitters.......................................................................... 57
Square-Law Process Variables............................................................................ 57
Stepping and Ramping the Output Value.................................................................. 58
Using Manual Step............................................................................................... 58
Contents
(continued)
iii
Using Auto Step................................................................................................... 59
Ramping the Output............................................................................................. 60
Simultaneous Measure/Source ..................................................................................... 63
Calibrating a Process Instrument .................................................................................. 66
Generating “As Found” Test Data............................................................................. 66
Adjusting the Transmitter.......................................................................................... 71
“As Left” Test Run .................................................................................................... 72
Test Comments ........................................................................................................ 73
Calibrating a Delta-Pressure Flow Instrument.......................................................... 73
Calibrating a Limit Switch......................................................................................... 74
Transmitter Mode.......................................................................................................... 77
Memory Operations....................................................................................................... 79
Saving Results.......................................................................................................... 79
Reviewing Memory................................................................................................... 81
Data Logging (Model 743B Only)............................................................................. 81
Recording Min and Max Measurements................................................................... 84
Running a Preloaded Task (743B only).................................................................... 84
Clearing Memory...................................................................................................... 84
Using the Built-in Calculator.......................................................................................... 85
Saving to and Recalling from the Registers.............................................................. 85
Using the Calculator to Set the Source Value .......................................................... 86
Quick Guide to Applications.......................................................................................... 86
Communicating with a PC (Model 743 Only)................................................................. 96
Maintenance.................................................................................................................. 96
Replacing the Battery Pack ...................................................................................... 96
Internal Lithium Backup Battery................................................................................ 97
Cleaning the Calibrator............................................................................................. 97
Calibration Data........................................................................................................ 97
741B/743B
Users Manual
iv
In Case of Difficulty................................................................................................... 97
Service Center Calibration or Repair ........................................................................ 98
Replacement Parts.................................................................................................... 99
Accessories.................................................................................................................... 100
Specifications................................................................................................................. 102
DC Voltage Measurement......................................................................................... 103
AC Voltage Measurement......................................................................................... 104
DC Current Measurement......................................................................................... 105
Resistance Measurement.......................................................................................... 105
Continuity Testing ..................................................................................................... 106
Frequency Measurement .......................................................................................... 106
DC Voltage Output.................................................................................................... 107
DC Current Output.................................................................................................... 108
Resistance Sourcing................................................................................................. 109
Frequency Sourcing.................................................................................................. 110
Temperature, Thermocouples................................................................................... 111
Temperature, Resistance Temperature Detectors.................................................... 114
Loop Power Supply................................................................................................... 116
Top and Bottom Limits of Ranges with Auto Range On............................................ 117
General Specifications.............................................................................................. 119
Index ............................................................................................................................. 121
v
List of Tables
Table Title Page
1. Summary of Source and Measure Functions..................................................................... 2
2. Input/Output Jacks and Connectors................................................................................... 12
3. Key Functions .................................................................................................................... 15
4. Battery Life......................................................................................................................... 22
5. Thermocouple Types Accepted.......................................................................................... 35
6. RTD Types Accepted......................................................................................................... 37
7. Simultaneous MEASURE/SOURCE Functions with Loop Power Disabled ....................... 64
8. Simultaneous MEASURE/SOURCE Functions with Loop Power Enabled........................ 65
9. Replacement Parts.............................................................................................................99
741B/743B
Users Manual
vi
vii
List of Figures
Figure Title Page
1. Standard Equipment .......................................................................................................... 5
2. Definition of Symbols .........................................................................................................8
3. Jumper Connections for Demonstration............................................................................. 11
4. Measure/Source Example.................................................................................................. 11
5. Input/Output Jacks and Connectors................................................................................... 13
6. Keys................................................................................................................................... 14
7. Elements of a Typical Display............................................................................................ 18
8. Using the Bail and Installing the Strap............................................................................... 19
9. Removing the Battery and Using the Charger.................................................................... 21
10. Electrical Measurement Connections................................................................................. 29
11. Gage and Differential Pressure Modules........................................................................... 31
12. Connections for Measuring Pressure................................................................................. 33
13. Measuring Temperature with a Thermocouple................................................................... 36
14. Using a Jumper Correctly................................................................................................... 39
15. Measuring Temperature with an RTD................................................................................ 40
16. Electrical Sourcing Connections ........................................................................................ 45
17. Connections for Simulating a 4 to 20 mA Transmitter........................................................ 47
741B/743B
Users Manual
viii
18. Connections for Supplying Loop Power.............................................................................. 49
19. Connections for Sourcing Pressure.................................................................................... 52
20. Connections for Simulating a Thermocouple...................................................................... 55
21. Connections for Simulating an RTD ................................................................................... 56
22. Checking a Relay Output Trip Alarm.................................................................................. 62
23. Calibrating a Thermocouple Temperature Transmitter....................................................... 68
24. Limit Switch Terminology.................................................................................................... 74
25. Calibrating a Chart Recorder.............................................................................................. 87
26. Measuring Voltage Drop..................................................................................................... 87
27. Monitoring AC Line Voltage and Frequency....................................................................... 88
28. Calibrating a Current-to-Pressure (I/P) Transmitter............................................................ 89
29. Measuring the Output Current of a Transmitter.................................................................. 90
30. Measuring a Precision Resistor.......................................................................................... 91
31. Sourcing Resistance........................................................................................................... 91
32. Checking a Switch.............................................................................................................. 92
33. Checking a Tachometer...................................................................................................... 92
34. Calibrating a Pressure-to-Current (P/I) Transmitter............................................................ 93
35. Calibrating a mV to Current Transmitter............................................................................. 94
36. Checking a Vortex Sheeding Flowmeter ............................................................................ 95
37. LCD Operating Environment Specification......................................................................... 120
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