Fluke 741B User Manual
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Fluke 741B User Manual

Documenting process calibrator
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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.

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  • Page 1 ® 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.
  • Page 2 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...

  • Page 3: Table Of Contents

    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....................
  • Page 4 741B/743B Users Manual 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....................
  • Page 5 Contents (continued) 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 ............
  • Page 6 741B/743B Users Manual 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 .....................
  • Page 7 List of Tables Table Title Page Summary of Source and Measure Functions ..............2 Input/Output Jacks and Connectors ................... 12 Key Functions ........................15 Battery Life ......................... 22 Thermocouple Types Accepted..................35 RTD Types Accepted ......................37 Simultaneous MEASURE/SOURCE Functions with Loop Power Disabled ....... 64 Simultaneous MEASURE/SOURCE Functions with Loop Power Enabled ......
  • Page 8 741B/743B Users Manual...
  • Page 9 List of Figures Figure Title Page Standard Equipment ......................5 Definition of Symbols ......................8 Jumper Connections for Demonstration................11 Measure/Source Example ....................11 Input/Output Jacks and Connectors ................... 13 Keys ........................... 14 Elements of a Typical Display .................... 18 Using the Bail and Installing the Strap ................
  • Page 10 741B/743B Users Manual Connections for Supplying Loop Power................49 Connections for Sourcing Pressure ..................52 Connections for Simulating a Thermocouple..............55 Connections for Simulating an RTD ................... 56 Checking a Relay Output Trip Alarm .................. 62 Calibrating a Thermocouple Temperature Transmitter............68 Limit Switch Terminology....................

  • Page 11: Introduction

    Documenting Process Calibrator Introduction General features: An analog display to make it easy to read Fluke 741B and 743B Documenting Process Calibrators (hereafter referred to as the calibrator) measurements when the input is unstable. are battery-powered, hand-held instruments that A setup option that lets you set the display to measure and source electrical and physical English, French, German, Italian, or Spanish.

  • Page 12: Summary Of Source And Measure Functions

    741B/743B Users Manual Table 1. Summary of Source and Measure Functions Function Measure Source dc V 0V to +/-300V 0V to 15V (10 mA max) ac V 0V to 300V rms, 20 Hz to 5 kHz No sourcing Frequency 1 Hz to 1 kHz (100 mV to 300V rms) 0.1V to 10V pk zero-symmetric sine or square 1 kHz to 30 kHz (0.5V to 30V rms) wave, 0 Hz to 50 kHz...
  • Page 13 Unless stated otherwise, everything in this manual instrument. applies to both the Fluke 741B and 743B Built-in calculator with square-root function, and Documenting Process Calibrators. accessible registers containing measure and For performance testing and calibration instructions source values.

  • Page 14: Standard Equipment

    741B/743B Users Manual For service help in the USA and Canada call a Fluke TP20 test probes (one set) Service Center. For application or operation BP7217 rechargeable nickel-cadmium battery assistance on Fluke products call: pack USA and Canada: 1-800-44-FLUKE BC7210 battery charger with Instruction Sheet...
  • Page 15 Documenting Process Calibrator Standard Equipment ( ZERO) AC20 Test Clip (2 Red and 2 Black) TL24 Test Leads (2 Red and 2 Black) Jumper (2 Black) TP20 Test Probe (1 Red and 1 Black) Strap gj1f.eps Figure 1. Standard Equipment...
  • Page 16 741B/743B Users Manual Users BP7217 Manual Nickel-Cadmium Battery Pack BC7210 Battery Charger gj2f.eps Figure 1. Standard Equipment (cont.)

  • Page 17: Safety Information

    Documenting Process Calibrator Safety Information Symbols used on the calibrator and in this manual Safety Information are explained in Figure 2. This calibrator is designed and tested in accordance with CAN/CSA C22.2 No. 1010.1-92, ANSI/ISA S82.01-1994, UL3111 and EN610-10:1993. Use the calibrator only as specified in this manual, otherwise the protection provided by the calibrator may be impaired.
  • Page 18 741B/743B Users Manual AC-Alternating Current CAUTION see explanation in manual DC-Direct Current Common (LO) Input equipotentiality Equipment protected throughout by DOUBLE INSULATION or Fuse REINFORCED INSULATION Conforms to relevent European Union directives. Pressure ON/OFF Conforms to relevent Canadian Standards Association directives. Overvoltage (Installation) Category per IEC 1010-1 refers to the level of Impluse Withstand Voltage protection provided.
  • Page 19 Documenting Process Calibrator Safety Information Do not use the calibrator if it operates Do not operate the calibrator around explosive abnormally. Protection may be impaired. When gas, vapor, or dust. in doubt, have the calibrator serviced. When using a pressure module, make sure the Select the proper function and range for your process pressure line is shut off and measurement.

  • Page 20: Getting Started Exercise

    741B/743B Users Manual 5. Press to switch to the SOURCE screen. Getting Started Exercise The calibrator is still measuring dc voltage, and The following is a brief getting started exercise that you can see the active measurements at the top will make it easier to understand the instructions in of the display.
  • Page 21 Documenting Process Calibrator Getting Started Exercise ( ZERO) gj4s.eps Figure 4. Measure/Source Example gj3f.eps Figure 3. Jumper Connections for Demonstration...

  • Page 22: Operating Features

    741B/743B Users Manual Input and Output Jacks Operating Features Figure 5 shows the calibrator input and output jacks. Table 2 explains their use. Table 2. Input/Output Jacks and Connectors Name Description Battery Eliminator jack Jack for the Model BE9005 Battery Eliminator. Use the battery eliminator for bench-top applications where ac line power is available.
  • Page 23 Documenting Process Calibrator Operating Features 743B DOCUMENTING PROCESS CALIBRATOR ki05f.eps Figure 5. Input/Output Jacks and Connectors...

  • Page 24: Keys

    741B/743B Users Manual Keys Figure 6 shows the calibrator keys and Table 3 743B DOCUMENTING PROCESS CALIBRATOR explains their functions. The softkeys are the four unmarked blue keys just below the display. Softkey functions are defined by the labels that appear above the softkey during operation.

  • Page 25: Key Functions

    Documenting Process Calibrator Operating Features Table 3. Key Functions Name Description Cycles the calibrator through MEASURE, SOURCE, and MEASURE/SOURCE modes. Selects mA (current) measure or source function. For loop power on/off, go to the Setup mode. Enters and exits Setup mode to modify operating parameters. Softkeys Perform the function defined by the label above each key on the display.
  • Page 26 741B/743B Users Manual Table 3. Key Functions (cont.) Name Description Adjust the display contrast. keys Make choices from lists on the display. Increase or decrease the source level when using the step feature. In calculator mode, provide arithmetic functions (+ - Terminates a numeric entry when setting a source value, or confirms your choice in a list.

  • Page 27: Display

    Documenting Process Calibrator Operating Features Measured Value: Shows the measured value in Display your choice of engineering units or percent of Figure 7 shows the features of a typical display. The scale. display shown is MEASURE mode. Near the top of the display is “Source Off.”...
  • Page 28 741B/743B Users Manual Loop Power Annunciator Time and Date Display Battery Save Annunciator Status Bar Source Status Undamped (Unsettled) Indicator Mode Indicator Custom Units Indicator Secondary Value Range Status Measured Value Softkey Labels gj7c.eps Figure 7. Elements of a Typical Display...

  • Page 29: Setting Up The Calibrator

    Documenting Process Calibrator Setting Up the Calibrator Setting Up the Calibrator support. Figure 8 also shows you how to open the Using the Strap and Bail bail to stand the calibrator at a comfortable viewing After you unpack the calibrator, attach its carrying angle for benchtop use.

  • Page 30: Charging The Battery

    741B/743B Users Manual time in trickle-charge mode (blinking indicator light Charging the Battery on the charger). Switching between charging modes Before you use the calibrator for the first time, is automatic. You can leave the battery pack on charge its battery pack for 2 hours in the external trickle charge indefinitely without damage.
  • Page 31 Documenting Process Calibrator Setting Up the Calibrator gj9f.eps Figure 9. Removing the Battery and Using the Charger...

  • Page 32: Battery Life

    741B/743B Users Manual Warning Battery Life To avoid false readings, which could Table 4 shows the operating time for a new, fully lead to possible electric shock or charged battery pack. Calibrator performance is personal injury, replace the battery as guaranteed to meet specifications until the low soon as the battery indicator (b) battery annunciator...

  • Page 33: Preserving Battery Life

    Where ac power is available, you can use the 4. Press u to highlight , then press optional Fluke Model BE9005 Battery Eliminator to conserve battery power. When the battery eliminator 5. To accept the timeout period shown on the is used, the battery is internally disconnected, and display, you can finish here.

  • Page 34: Selecting The Display Language

    741B/743B Users Manual The battery eliminator is handy for troubleshooting Adjusting the Display Contrast process instruments on the workbench, and for long- Press to increase contrast. Press term data logging. When you calibrate an instrument, to decrease contrast. When the keys you will get best results using battery power.
  • Page 35 Documenting Process Calibrator Setting Up the Calibrator Proceed as follows to set up the time and date displays: 1. Press 2. Press the softkey. The display Next Page appears as follows: gj39s.eps 4. Press to move the cursor to the desired date format.

  • Page 36: Using The Backlight

    741B/743B Users Manual 7. Press or the softkey. Using the Backlight Choices 8. Enter your choice of timeout period in minutes Press to toggle the display backlight on and off. When the backlight is on, the symbol shows at (accepted range: 1 to 120 minutes). the top of the display.
  • Page 37 Documenting Process Calibrator Setting Up the Calibrator 4. Press or the softkey. The 8. Press the softkey. Choices Done display appears as follows: 9. Press the softkey or to exit Setup Done mode. gj40s.eps 5. The string is shown at the bottom of the boxed area.

  • Page 38: Using Measure Mode

    741B/743B Users Manual end of this manual. When you press the key, Using Measure Mode the range is locked. Press it again to cycle to and lock on the next higher range. Press it and hold it for Note two seconds to revert to Auto Range. To achieve best noise rejection and highest accuracy performance, do not use the If the range is locked, overrange inputs produce a...
  • Page 39 Documenting Process Calibrator Using Measure Mode SOURCE MEAS 300V – Black SOURCE MEAS 300V Black gj10f.eps Figure 10. Electrical Measurement Connections...

  • Page 40: Testing Continuity

    When measuring frequency, you are Many ranges and types of pressure modules are prompted to select a frequency range. If you available from Fluke. See “Accessories” near the expect the frequency you are measuring to back of this manual. Before you use a pressure...
  • Page 41 Documenting Process Calibrator Using Measure Mode Caution Gage To avoid mechanically damaging the Differential pressure module, never apply more than High 10 ft.-lb. of torque between the pressure 700 P 06 700 P 04 PRESSURE MODULE PRESSURE MODULE 100 PSIG RANGE RANGE 15 PSID/G...
  • Page 42 741B/743B Users Manual 1. Connect a pressure module to the calibrator as 5. If desired, you can change pressure display shown in Figure 12. The threads on the units to psi, mHg, inHg, mH O, inH pressure modules accept standard ¼ NPT pipe O@60 F, ftH O, bar, g/cm , or Pa.
  • Page 43 Documenting Process Calibrator Using Measure Mode Isolation 743B DOCUMENTING PROCESS CALIBRATOR Valve Gage Module ( ZERO) Differential Module Tank ki12c.eps Figure 12. Connections for Measuring Pressure...

  • Page 44: Measuring Temperature

    741B/743B Users Manual 2. Press . The display prompts you to select Measuring Temperature the thermocouple type. Using Thermocouples 3. Select the desired thermocouple type using the followed by The calibrator supports eleven standard thermocouples, each identified with an alpha 4.

  • Page 45: Thermocouple Types Accepted

    Documenting Process Calibrator Using Measure Mode Table 5. Thermocouple Types Accepted Positive Lead (H) Type Positive Lead Color Negative Lead Specified Range Material Material ( C) ANSI* IEC** Chromel Purple Violet Constantan -250 to 1000 Ni-Cr-Si Orange Pink Ni-Si-Mg -200 to 1300 Iron White Black...
  • Page 46 741B/743B Users Manual SOURCE MEAS 300V Process Temperature Warning 30V maximum to TC Miniplug gj12f.eps Figure 13. Measuring Temperature with a Thermocouple...

  • Page 47: Using Resistance-Temperature Detectors (Rtds)

    Documenting Process Calibrator Using Measure Mode terminal configuration. The calibrator accepts RTD Using Resistance-Temperature Detectors measurement inputs in two-, three-, or four-wire (RTDs) connections as shown in Figure 15. A four-wire The calibrator accepts RTD types shown in Table 6. configuration provides the highest measurement RTDs are characterized by their resistance at 0°C precision, and two-wire provides the lowest...
  • Page 48 741B/743B Users Manual To measure temperature using an RTD input, Caution proceed as follows: Do not force a dual banana plug between any two jacks in the horizontal 1. If necessary, press for MEASURE mode. orientation. Doing so will damage the 2.
  • Page 49 Documenting Process Calibrator Using Measure Mode 8. If necessary, you can change between C or F temperature units in Setup mode as follows: a. Press WRONG b. Press the softkey twice. Next Page c. Use the keys to move the cursor to the parameter you which to change, then press or the...
  • Page 50 741B/743B Users Manual SOURCE MEAS 300V SOURCE MEAS 300V SOURCE MEAS 300V gj15f.eps Figure 15. Measuring Temperature with an RTD...

  • Page 51: Measurements In Percent Of Scale

    Documenting Process Calibrator Using Measure Mode 9. Press the softkey. Measurements in Percent of Scale Done Percent of scale remains in effect until you press the This feature lets you scale the measurements in accordance with a particular process instrument’s softkey again or change to another Scale response.

  • Page 52: Customizing Mv Input Units

    741B/743B Users Manual 5. Press 1. When measuring the millivolt output of the accessory, press the softkey. Custom Units 6. Use the numeric keypad to enter the 100% of scale value ( 2. Enter the name of the custom units (up to four 100% Value characters), for example (for pH), using the...

  • Page 53: Damping Your Measurements

    The damping method is a running average of the last several measurements. Fluke recommends that you leave damping on. Turning damping off may be useful when measurement response is more important than accuracy or noise reduction.

  • Page 54: Using Source Mode

    741B/743B Users Manual Note Using Source Mode If you are sourcing frequency, respond to the The operating mode (i.e., MEASURE, SOURCE) is display prompt to select a zero-symmetric shown in a reverse-video bar on the display. If the sine or positive square wave. The amplitude calibrator is not in SOURCE mode, press until you specify is p-p amplitude.
  • Page 55 Documenting Process Calibrator Using Source Mode SOURCE MEAS 300V – Black Common SOURCE MEAS 300V – Black Common gj16f.eps Figure 16. Electrical Sourcing Connections...

  • Page 56: Simulating A 4 To 20 Ma Transmitter

    741B/743B Users Manual Simulating a 4 to 20 mA Transmitter You can configure the calibrator as a load on a current loop through the SOURCE mA function. When you press the key in SOURCE mode, the display prompts you to select Source mA Simulate .
  • Page 57 Documenting Process Calibrator Using Source Mode 743B DOCUMENTING PROCESS CALIBRATOR MEAS SETUP SOURCE RANGE CLEAR ( ZERO) ENTER Loop Black Power SOURCE MEAS 300V Supply – ki17c.eps Figure 17. Connections for Simulating a 4 to 20 mA Transmitter...

  • Page 58: Supplying Loop Power

    741B/743B Users Manual Connect the calibrator in series with the instrument Supplying Loop Power current loop as Figure 18 shows. Proceed as follows The calibrator supplies loop power at 28V or 24V dc. to source loop power: The 28V setting supplies enough current for two or three 4-20 mA devices on the loop in addition to the 1.
  • Page 59 Documenting Process Calibrator Using Source Mode 743B DOCUMENTING PROCESS CALIBRATOR MEAS SETUP SOURCE TEST DC PWR RANGE CLEAR – + – ( ZERO) ENTER – SOURCE MEAS 300V Black ki18c.eps Figure 18. Connections for Supplying Loop Power...

  • Page 60: Sourcing Pressure

    Many ranges and types of pressure modules are fittings or adapters. available from Fluke. See “Accessories” near the To avoid damaging the pressure module back of this manual. Before you use a pressure from overpressure, never apply pressure module, read its Instruction Sheet.
  • Page 61 Documenting Process Calibrator Using Source Mode 1. Connect a pressure module and pressure source base units (Pa, mHg, etc.). Change the pressure to the calibrator as Figure 19 shows. The threads display units as follows: on the pressure modules accept ¼ NPT fittings. a.
  • Page 62 741B/743B Users Manual Pressure Module 743B DOCUMENTING PROCESS CALIBRATOR Hand Pump MEAS SETUP SOURCE CLEAR RANGE ( ZERO) ENTER SOURCE MEAS 300V ki19c.eps Figure 19. Connections for Sourcing Pressure...

  • Page 63: Simulating Thermocouples

    Documenting Process Calibrator Using Source Mode 5. Press the key followed by Simulating Thermocouples select (default), or , (for Linear T Linear mV Note calibrating a temperature transmitter that responds linearly to millivolt inputs). Refer to “Measuring Temperature” earlier in the manual for a table of data relating to 6.

  • Page 64: Simulating Rtds

    741B/743B Users Manual 1. If necessary, press for SOURCE mode. Simulating RTDs 2. Press until the select RTD type display is Note showing. Refer to Table 6 for information about RTD (Resistance-Temperature Detector) types 3. Press the keys followed by supported by the calibrator.
  • Page 65 Documenting Process Calibrator Using Source Mode 743B DOCUMENTING PROCESS CALIBRATOR TEST DC PWR Color depends – on type of TC – MEAS SETUP SOURCE RANGE CLEAR ( ZERO) ENTER SOURCE MEAS 300V TC Miniplug ki20c.eps Figure 20. Connections for Simulating a Thermocouple...
  • Page 66 741B/743B Users Manual Transmitter Black SOURCE MEAS 300V gj21f.eps Figure 21. Connections for Simulating an RTD...

  • Page 67: Sourcing In Percent Of Scale

    Documenting Process Calibrator Using Source Mode Sourcing in Percent of Scale Percent of scale remains in effect until you press the softkey again or you change the source Scale This feature lets you scale the output in accordance function. with the input requirements of a particular process instrument’s response.

  • Page 68: Stepping And Ramping The Output Value

    741B/743B Users Manual 9. Press the softkey. 1. Refer to the appropriate “Using Source Mode” Done subheading earlier in this manual (e.g., Percent of scale remains in effect until you press the “Sourcing Electrical Parameters”) and connect softkey again. Scale the calibrator to the circuit to be tested.

  • Page 69: Using Auto Step

    Documenting Process Calibrator Using Source Mode Using Auto Step 7. Select values for the following parameters as you are prompted by the display: To have the calibrator make a sequence of steps Starting point (in units or % of scale) automatically, either once through the sequence or Ending point repetitively, proceed as follows:...

  • Page 70: Ramping The Output

    741B/743B Users Manual Ramping the Output Proceed as follows to ramp (i.e., sweep the source): Ramping sweeps the source up or down in value. 1. Refer to the appropriate heading earlier in this Use the ramp feature to check a limit switch or alarm, manual (e.g., “Sourcing Electrical Parameters”) and connect the calibrator to the circuit to be or any time you want a smoothly increasing or...
  • Page 71 Documenting Process Calibrator Using Source Mode 7. Press the softkey. The display changes to 10. Press the softkey. Note the Ramp Done RAMP the following: annunciator next to at the top of the SOURCE display. 11. Select a low-to-high ramp or a high-to-low ramp with the softkey.
  • Page 72 741B/743B Users Manual 743B DOCUMENTING PROCESS CALIBRATOR Trip Relay Voltage Trip Detect Output – MEAS SETUP SOURCE CLEAR RANGE ( ZERO) Input 4 – 20 mA ENTER – Black SOURCE MEAS 300V Black Source mA ki22c.eps Figure 22. Checking a Relay Output Trip Alarm...

  • Page 73: Simultaneous Measure/Source

    Documenting Process Calibrator Simultaneous Measure/Source Table 7 shows the functions you can use Simultaneous Measure/Source simultaneously when Loop Power is disabled. Table Use the MEASURE/SOURCE mode to calibrate or 8 shows the functions you can use simultaneously emulate a process instrument. Press so that a when Loop Power is enabled.

  • Page 74: Simultaneous Measure/Source Functions With Loop Power Disabled

    741B/743B Users Manual Table 7. Simultaneous MEASURE/SOURCE Functions with Loop Power Disabled Measure Function Source Function dc V Freq Pressure dc V ac V Frequency ( 20 Hz) Low Frequency (<20 Hz) Continuity 3W RTD 4W RTD Pressure...

  • Page 75: Simultaneous Measure/Source Functions With Loop Power Enabled

    Documenting Process Calibrator Simultaneous Measure/Source Table 8. Simultaneous MEASURE/SOURCE Functions with Loop Power Enabled Measure Function Source Function dc V Freq Pressure dc V ac V Frequency ( 20 Hz) Pressure...

  • Page 76: Calibrating A Process Instrument

    741B/743B Users Manual In this case the calibrator is simulating the output of a Calibrating a Process Instrument thermocouple and measuring the resulting current When the calibrator is in simultaneous from the transmitter. Other transmitters use this MEASURE/SOURCE mode, a built-in calibration same method.
  • Page 77 Documenting Process Calibrator Calibrating a Process Instrument 8. Press for MEASURE/SOURCE mode. The display changes to: gj44s.eps 10. Enter values for of 4.0 mA and 100% 20.0 mA, respectively. Set to 0.5% of Tolerance gj42s.eps span. (Use other values if necessary for your application.) 9.
  • Page 78 741B/743B Users Manual 743B DOCUMENTING PROCESS CALIBRATOR Color depends TEST DC PWR on type of TC – – MEAS SETUP SOURCE RANGE CLEAR (ZERO) Original ENTER Circuit Wiring SOURCE MEAS 300V Power – Miniplug Supply Black ki23c.eps Figure 23. Calibrating a Thermocouple Temperature Transmitter...
  • Page 79 Documenting Process Calibrator Calibrating a Process Instrument 11. If the process instrument needs more time to in percent of scale. Our example uses five points settle than the calibrator’s normal settling time (0%, 25%, 50%, 75%, and 100%), rising only. (about 2 seconds) at each new stimulus level, Rising is indicated by the up arrow on the enter that time in seconds for...
  • Page 80 741B/743B Users Manual 16. Press the softkey to accept the calibration measurement to stop changing, the Auto Test Done parameters. The display changes to: works correctly for instruments with built-in damping. The error of the expected measured value is shown in the top left of the measure window.

  • Page 81: Adjusting The Transmitter

    Documenting Process Calibrator Calibrating a Process Instrument 19. In the results summary test, failures are Adjusting the Transmitter highlighted. An adjustment is required in this Proceed as follows to make the calibration example because three tests show failures. The adjustments to the transmitter. (Always refer to the failures were outside the ±0.5% tolerance that transmitter manufacturer’s instructions to locate the we selected.

  • Page 82: As Left" Test Run

    741B/743B Users Manual 4. Adjust the transmitter output for 20 mA. 5. If the span was adjusted in step 4, you must go back and repeat steps 3 and 4 until no more adjustment is required. 6. Now check the transmitter at 50%. If it is within specification, your adjustment is complete.

  • Page 83: Test Comments

    Documenting Process Calibrator Calibrating a Process Instrument Measure/Source displays are in engineering Test Comments units. Model 743B runs tasks (custom procedures) that are developed using a host computer and compatible The measurement percentage is automatically application software. A task may display a list of corrected for the transmitter’s square-root proposed comments during execution.

  • Page 84: Calibrating A Limit Switch

    741B/743B Users Manual Calibrating a Limit Switch The procedure to calibrate a limit switch also uses the As Found and As Left calibration templates. Switch B Select either the Open 1 Pt. Switch 2 Pt. Switch Switch B procedure in a menu after you press the As Found Setpoint Deadband...
  • Page 85 Documenting Process Calibrator Calibrating a Process Instrument The procedure for testing a pressure limit switch 7. Press to zero the pressure module. follows. The switch in this example sets at a high limit 8. Press of 10 psi. The set state is a closed switch contact. For pressure switches, you use the Manual Test 9.
  • Page 86 741B/743B Users Manual 16. Set by cycling through 26. Press the softkey. Trip Function Trip Cont Done the choices with the key. 27. Press the softkey to run the test again As Left 17. Press the softkey. with the same parameters. Results from the As Done Found and As Left tests are saved in the 18.

  • Page 87: Transmitter Mode

    Documenting Process Calibrator Transmitter Mode To set up the calibrator to emulate a transmitter, Transmitter Mode proceed as follows: You can set up the calibrator so that a varying input 1. Disconnect the control bus wires from the (MEASURE) controls the output (SOURCE), like a transmitter output (loop current or dc V control transmitter.
  • Page 88 741B/743B Users Manual 7. Press for SOURCE mode. 15. The calibrator is now in Transmitter mode. It is measuring the process input and sourcing the 8. Press the appropriate function key for the control control signal output proportional to the input. output (e.g., ).

  • Page 89: Memory Operations

    Documenting Process Calibrator Memory Operations Memory Operations Saving Results As Found/As Left test results are automatically saved at the end of each test routine. Any other time during MEASURE, SOURCE, or MEASURE / SOURCE you can press the softkey to save the data on the Save display for later review.
  • Page 90 741B/743B Users Manual gj50s.eps gj51s.eps Enter alpanumeric characters into the highlighted 1. Enter numbers using the numeric keypad, and field with the optional bar code wand (743 only) or letters by highlighting the desired character with the calibrator keys. , , and keys followed by Enter a space character by pressing the Space...

  • Page 91: Reviewing Memory

    Documenting Process Calibrator Memory Operations Reviewing Memory Data Logging (Model 743B Only) Press the softkey until With Model 743B only, you can record a series of More Choices Review Memory appears, then press the softkey to measurements for later uploading to a host computer Review Memory recall and view saved results.
  • Page 92 741B/743B Users Manual Proceed as follows to log data: Readings/Minute Maximum Approximate Readings Duration 1. If necessary, press for MEASURE mode. 8000 133 hours 2. Press the softkey. More Choices 8000 66 hours 8000 26 hours 3. Press the softkey. 8000 13 hours 8000...
  • Page 93 Documenting Process Calibrator Memory Operations 8. After you enter your choice of duration, you can 10. Note the annunciator next to MEASURE see how much memory that duration would Press the softkey to start taking Start Logging consume. See the data.

  • Page 94: Recording Min And Max Measurements

    741B/743B Users Manual Recording Min and Max Measurements Running a Preloaded Task (743B only) You can set the display to record and show the Press the softkey until the More Choices Tasks maximum and minimum readings. Min and Max softkey appear, then press to view the list of Tasks readings are always undamped, even if Dampen is...

  • Page 95: Using The Built-In Calculator

    Documenting Process Calibrator Using the Built-in Calculator Saving to and Recalling from the Using the Built-in Calculator Registers For solving mathematical equations that involve the When the calibrator is in calculator mode, the top half calibrator’s source or measured value, you can use of the display shows three register names and their the calibrator’s built-in calculator.

  • Page 96: Using The Calculator To Set The Source Value

    741B/743B Users Manual Using the Calculator to Set the Source Quick Guide to Applications Value The following figures show test lead connections and When you store to , the calibrator presents SOURCE which calibrator function to use for many different you with a choice of unit multipliers when appropriate applications.
  • Page 97 Documenting Process Calibrator Quick Guide to Applications Measure V 743B DOCUMENTING PROCESS CALIBRATOR 743B DOCUMENTING PROCESS CALIBRATOR MEAS SETUP SOURCE MEAS SETUP SOURCE CLEAR RANGE (ZERO) RANGE CLEAR (ZERO) Circuit 0 to 1V dc ENTER Input ENTER SOURCE MEAS 300V Black SOURCE MEAS...
  • Page 98 741B/743B Users Manual Measure 743B DOCUMENTING PROCESS CALIBRATOR MEAS SETUP SOURCE RANGE CLEAR ( ZERO) ENTER SOURCE MEAS 300V BLACK ki27c.eps Figure 27. Monitoring AC Line Voltage and Frequency...
  • Page 99 Documenting Process Calibrator Quick Guide to Applications Measure Pressure 743B DOCUMENTING PROCESS CALIBRATOR Source mA Loop Power Disabled S I G N A L – T E S T MEAS Pressure SETUP SOURCE Module RANGE CLEAR (ZERO) ENTER SOURCE MEAS 300V Black ki28c.eps...
  • Page 100 741B/743B Users Manual Measure mA Loop Power Disabled 743B DOCUMENTING PROCESS CALIBRATOR TEST DC PWR – – MEAS SETUP SOURCE RANGE CLEAR ( ZERO) Original ENTER Circuit Wiring SOURCE MEAS 300V Power – Supply Black ki29c.eps Figure 29. Measuring the Output Current of a Transmitter...
  • Page 101 Documenting Process Calibrator Quick Guide to Applications Source Measure Resistance Resistance 743B DOCUMENTING PROCESS CALIBRATOR 743B DOCUMENTING PROCESS CALIBRATOR MEAS SETUP SOURCE MEAS SETUP SOURCE RANGE CLEAR (ZERO) CLEAR RANGE ( ZERO) ENTER ENTER SOURCE MEAS 300V Circuit SOURCE MEAS 300V Black Black...
  • Page 102 741B/743B Users Manual Measure Measure Frequency Continuity 743B DOCUMENTING PROCESS CALIBRATOR 743B DOCUMENTING PROCESS CALIBRATOR MEAS SETUP MEAS SETUP SOURCE SOURCE CLEAR RANGE RANGE CLEAR (ZERO) (ZERO) ENTER ENTER SOURCE MEAS 300V SOURCE MEAS 300V Black Black ki32c.eps ki33c.eps Figure 32. Checking a Switch Figure 33.
  • Page 103 Documenting Process Calibrator Quick Guide to Applications Measure mA Hand Pump Source Pressure 743B DOCUMENTING PROCESS CALIBRATOR Loop Power Enabled 24V S I G N A L – T E S T MEAS SETUP SOURCE Pressure Module RANGE CLEAR ( ZERO) ENTER SOURCE MEAS...
  • Page 104 741B/743B Users Manual 743B DOCUMENTING PROCESS CALIBRATOR Measure mA Output – Input 0 – 1mV, 0 – 10mV, 0– 100mV, 1 – 5V, 0 – 1V, 0 – 10V MEAS SETUP SOURCE Output RANGE CLEAR (ZERO) 4–20 mA Input ENTER –...
  • Page 105 Documenting Process Calibrator Quick Guide to Applications Measure 743B DOCUMENTING PROCESS CALIBRATOR Frequency Black MEAS SETUP SOURCE RANGE CLEAR ( ZERO) ENTER SOURCE MEAS 300V ki36c.eps Figure 36. Checking a Vortex Sheeding Flowmeter...

  • Page 106: Communicating With A Pc (Model 743 Only)

    Model BP7217 personal computer, Microsoft Windows, and Fluke Nickel-Cadmium Battery Pack. In the USA and DPC/TRACK software, or a qualified Fluke partner’s Canada call Fluke Service Parts at 1-800-526-4731. software are required. A custom serial interface Outside the USA and Canada call +1 425-356-5500.

  • Page 107: Internal Lithium Backup Battery

    You cannot access the lithium battery. Return the in the calibration screen. Calibration of the calibrator to an authorized Fluke service center if you 741B and 743B is to be done by qualified personnel. need to replace the lithium battery. When the lithium...

  • Page 108: Service Center Calibration Or Repair

    A Fluke 741B or 743B calibrator covered by the when you turn it on. To see if the calibrator is warranty will be promptly repaired or replaced (at receiving power, cup your hands around the display Fluke’s option) and returned to you at no charge.

  • Page 109: Replacement Parts

    “Standard Equipment,” near the front of this manual, Replacement Parts and “Accessories,” later in this manual for model or Table 9 lists the Fluke part number of each user- part numbers of standard and optional equipment. replaceable part for Models 741B and 743B. See Table 9.

  • Page 110: Accessories

    Pressure Modules, Fluke model numbers listed Accessories below. (Differential models also operate in gage The Fluke accessories listed below are compatible mode.) Contact your Fluke representative about with the 741B and 743B calibrators. For more new pressure modules not listed here.
  • Page 111 Documenting Process Calibrator Accessories Fluke-700PA3: 0 to 5 psi (absolute, wet) C781 Soft Carrying Case Fluke-700PA4: 0 to 15 psi (absolute, wet) C789 Soft Carrying Case Fluke-700PA5: 0 to 30 psi (absolute, wet) Fluke-700PA6: 0 to 100 psi (absolute, wet)

  • Page 112: Specifications

    741B/743B Users Manual 80T-150U Temperature Probe Measurement specifications are valid only when Damping is turned on. When damping is turned off, 80PK series thermocouples or when the annunciator is displayed, floor specifications are multiplied by 3. Floor specifications 80i-410 Clamp-on DC/AC Current Probe are the second part of the specifications, usually 80i-1010 Clamp-on DC/AC Current Probe expressed as "% of full scale."...

  • Page 113: Dc Voltage Measurement

    Documenting Process Calibrator Specifications DC Voltage Measurement Models 741B and 743B Range Resolution % of Reading +% of Full Scale 1 Year 2 Year 110 mV 0.025% + 0.015% 0.05% + 0.015% 1.1V 10 V 0.025% + 0.005% 0.05% + 0.005% 100 V 0.025% + 0.005% 0.05% + 0.005%...

  • Page 114: Ac Voltage Measurement

    741B/743B Users Manual AC Voltage Measurement Models 741B and 743B % of Reading + Number of Counts Frequency Range 1 Year 2 Year 20 Hz to 40 Hz 2% + 10 2% + 10 40 Hz to 500 Hz 0.5% + 5 0.5% + 5 500 Hz to 1 kHz 2% + 10...

  • Page 115: Dc Current Measurement

    Documenting Process Calibrator Specifications DC Current Measurement Models 741B and 743B Range Resolution % of Reading +% of Full Scale 1 Year 2 Year 30 mA 0.01% + 0.015% 0.02% + 0.015% 110 mA 10 A 0.01% + 0.015% 0.02% + 0.015% Temperature Coefficient: (0.001% of rdg.

  • Page 116: Continuity Testing

    741B/743B Users Manual Continuity Testing Tone Resistance Continuous tone <25 May or may not get tone 25 to 400 No tone >400 Frequency Measurement Accuracy Ranges 1 Year 2 Year 1.00 Hz to 109.99 Hz 0.05 Hz 0.05 Hz 110.0 Hz to 1099.9 Hz 0.5 Hz 0.5 Hz 1.100 kHz to 10.999 kHz...

  • Page 117: Dc Voltage Output

    Documenting Process Calibrator Specifications DC Voltage Output Models 741B and 743B Range Resolution % of Output + % of Full Scale 1 Year 2 Year 110 mV 0.01% + 0.005% 0.015% + 0.005% 1.1 V 10 V 0.01% + 0.005% 0.015% + 0.005% 15 V 100 V...

  • Page 118: Dc Current Output

    741B/743B Users Manual DC Current Output Models 741B and 743B Range/Mode Resolution % of Output + % of Full Scale 1 Year 2 Year 22 mA/ Source mA 0.01% + 0.015% 0.02% + 0.015% 22 mA/ Simulate Transmitter 0.02% + 0.03% 0.02% + 0.03% (Current Sink) Maximum Burden Voltage: 24V...

  • Page 119: Resistance Sourcing

    Documenting Process Calibrator Specifications Resistance Sourcing Models 741B and 743B % of Output + ohms Range Resolution 1 Year 2 Year 11.000 0.01% + 0.02 0.02% + 0.02 110.00 10 m 0.01% + 0.04 0.02% + 0.04 1.1000 k 100 m 0.02% + 0.

  • Page 120: Frequency Sourcing

    741B/743B Users Manual Frequency Sourcing Range Accuracy 1 and 2 Year 0.00 Hz to 10.99 Hz 0.01 Hz 11.00 Hz to 109.99 Hz 0.1 Hz 110.0 Hz to 1099.9 Hz 0.1 Hz 1.100 kHz to 21.999 kHz 0.002 kHz 22.000 kHz to 50.000 kHz 0.005 kHz Waveform Choices: Zero-symmetric sine or positive square wave, 50% duty cycle.

  • Page 121: Temperature, Thermocouples

    Documenting Process Calibrator Specifications Temperature, Thermocouples Temperature, TCs, Models 741B and 743B Measure °C Source °C Type Range C 1 Year 2 Year 1 Year 2 Year -250 to -200 -200 to -100 -200 to -100 600 to 1000 -200 to -100 -100 to 900 900 to 1300 -210 to -100...
  • Page 122 741B/743B Users Manual Temperature, Thermocouples (cont.) Measure °C Source °C Type Range C 1 Year 2 Year 1 Year 2 Year 600 to 800 800 to 1000 1000 to 1820 -20 to 0 0 to 100 100 to 1767 -20 to 0 0 to 200 200 to 1400 1400 to 1767...
  • Page 123 Documenting Process Calibrator Specifications Temperature, Thermocouples (cont.) Measure °C Source °C Type Range C 1 Year 2 Year 1 Year 2 Year -200 to 0 0 to 600 Sensor inaccuracies not included. Accuracy with external cold junction; for internal junction add 0.2 C Resolution: 0.1 C Temperature Scale: ITS-90 or IPTS-68, selectable Compensation: ITS-90 per NIST Monograph 175 for B,R,S,E,J,K,N,T;...

  • Page 124: Temperature, Resistance Temperature Detectors

    741B/743B Users Manual Temperature, Resistance Temperature Detectors Temperature, RTDs, Model 741B and 743B Measure °C Source °C Type ( ) Range °C 1 Year 2 Year 1 Year 2 Year Pt(3926) -200 to 0 0 to 630 Pt(385) -200 to 0 0 to 400 400 to 800 Ni(672)
  • Page 125 Documenting Process Calibrator Specifications Temperature, Resistance Temperature Detectors (cont.) Measure °C Source °C Type ( ) Range °C 1 Year 2 Year 1 Year 2 Year 1000 Pt(385) -200 to 0 0 to 400 400 to 630 Cu(427) -100 to 0 0 to 260 Pt(3916) -200 to -190...

  • Page 126: Loop Power Supply

    741B/743B Users Manual Loop Power Supply Models 741B and 743B Setting 1 Year 2 Year 24 Volt 28 Volt Short circuit protected Maximum Current: 22 mA Maximum Input Voltage: 30V dc...

  • Page 127: Top And Bottom Limits Of Ranges With Auto Range On

    Documenting Process Calibrator Specifications Top and Bottom Limits of Ranges with Auto Range On Range, dc V Measure Top of Range Bottom of Range 110 mV ±110.000 mV 0.000 mV 1.1V ±1.10000V ±0.10000V ±11.0000V ±1.0000V 110V ±110.000V ±10.000V 300V ±300.00V ±100.00V Range, dc V Source 110 mV...
  • Page 128 741B/743B Users Manual Top and Bottom Limits of Ranges with Auto Range On (cont.) Range, Current Measure 22 mA +22.000 mA 0.000 mA 110 mA +110.00 mA +30.00 mA Range, Current Source 22 mA +30.000 mA 0.000 mA Range, Frequency Measure 100 Hz 109.99 Hz 1.00 Hz...

  • Page 129: General Specifications

    Documenting Process Calibrator Specifications General Specifications Display: 240 by 200 pixel graphic LCD, 70 x 58 mm. Power: Internal battery pack: NiCd, 7.2V, 1700 mAh. Memory Backup: Lithium battery, 5 years typical lifetime. Dimensions: 130 x 236 x 61 mm (5.1 x 9.3 x 2.4 in.). Weight: 1.4 kg (3 lb.
  • Page 130 741B/743B Users Manual 100 120 ˚ Temperature ( ˚ Temperature ( ˚ ˚ = Storage (-20 C — 60 ˚ ˚ = Normal Operation (-10 C — 50 C), humidity typical gj37f.eps Figure 37. LCD Operating Environment Specification...

  • Page 131: Index

    Index , 7, 12, 20, 36, 42 —B— Backlight, 26 4 to 20 ma transmitter auto timeout, 26 Bail, 19 simulating, 46 Bar code wand, 3, 80 Battery —A— auto save timeout, 23 charge life, 22 Accessories, 100 eliminator, 23 As found test data, 66 lithium backup, 97 As left test data, 72...
  • Page 132 741B/743B Users Manual —C— Display language selecting, 24 Calculator, 85 Calibration, 98 —F— data, 97 Cleaning Frequency the calibrator, 97 measuring, 28 Communicating with a PC (743 only), 96 sourcing, 44 Connections for electrical measurement, 28 —J— Continuity testing, 30 Jacks, 12 trip detect during ramping, 60 Contrast...
  • Page 133 Index (continued) sourcing, 50 —M— Pressure modules available, 100 Measure mode, 28 —R— Measure/source mode, 63 Measurement Ramping the output, 60 damping, 43 Repair, 98 Measuring Replacement parts, 99 continuity, 30 Resistance current, 28 measuring, 28 electrical parameters, 28 sourcing, 44 frequency, 28 Results pressure, 30...
  • Page 134 741B/743B Users Manual Simulating, 53 Measuring with Thermocouple, 34 loop power, 46 scale, 34, 39 thermocouples, 53 Thermocouple Simultaneous measure/source, 63 measuring, 34 Source measuring temperature with, 34 mode, 44 sourcing, 53 Source mode, 44 types, 34 Sourcing Time current, 44 display, activating, 24 electrical parameters, 44 format, 24...

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