Fluke 744 - Loop Power Supply

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744

Users Manual

118

Loop Power Supply

Setting 1 Year 2 Year

24 Volt 5% 5%

28 Volt 5% 5%

Short circuit protected

Maximum Current: 22 mA

Maximum Input Voltage: 30 V dc

Output Resistance: 250 Ω nominal

Main Page

Table of Contents3
Introduction11
Standard Equipment13
Summary of Source and Measure Functions14
Safety Information17
Getting Started Exercise20
Operating Features22
- Input and Output Jacks22
- Input/Output Jacks and Connectors22
- Keys24
Key Functions25
- Display27
Setting up the Calibrator29
- Using the Strap and Bail29
- Charging the Battery30
- Battery Life32
- Preserving Battery Life33
- Using the Optional Battery Eliminator33
- Selecting the Display Language34
- Adjusting the Display Contrast34
- Displaying the Date and Time34
- Using the Backlight36
- Personalizing the Calibrator36
Using Measure Mode38
- Measurement Ranges38
- Measuring Electrical Parameters38
- Testing Continuity40
- Measuring Pressure40
- Measuring Temperature44
  - Using Thermocouples44
Thermocouple Types Accepted45
- Using Resistance-Temperature Detectors (Rtds)47
RTD Types Accepted47
- Measurement Scale51
  - Linear-Output Transmitters51
  - Square-Law Process Variables52
- Measuring or Sourcing with Custom Units53
- Using the 700-IV Current Shunt54
- Damping Your Measurements54
Using Source Mode56
- Sourcing Electrical Parameters56
- Simulating a 4 to 20 Ma Transmitter58
- Supplying Loop Power60
- Sourcing Pressure62
- Simulating Thermocouples65
- Simulating Rtds66
- Source Scale69
  - Linear-Responding Transmitters69
  - Square-Law Process Variables69
- Stepping and Ramping the Output Value70
Simultaneous Measure/Source75
Simultaneous MEASURE/SOURCE Functions with Loop Power Disabled76
Simultaneous MEASURE/SOURCE Functions with Loop Power Enabled77
Generating "As Found" Test Data78
- Adjusting the Transmitter83
- As Left" Test Run84
- Test Comments85
- Calibrating a Delta-Pressure Flow Instrument85
- Calibrating a Limit Switch86
Calibrating a Process Instrument78
Transmitter Mode89
Memory Operations91
- Saving Results91
- Reviewing Memory93
- Data Logging93
- Recording Min and Max Measurements96
- Running a Preloaded Task96
- Clearing Memory96
Using the Built-In Calculator97
- Saving to and Recalling from the Registers97
- Using the Calculator to Set the Source Value98
Quick Guide to Applications98
Communicating with a PC108
Maintenance108
- Replacing the Battery Pack108
- Internal Lithium Backup Battery109
- Cleaning the Calibrator109
- Calibration Data109
- In Case of Difficulty109
- Service Center Calibration or Repair110
Replacement Parts111
Accessories112
Specifications114
- DC Voltage Measurement115
- AC Voltage Measurement116
- DC Current Measurement117
- Resistance Measurement117
- Continuity Testing118
- Frequency Measurement118
- DC Voltage Output119
- DC Current Output120
- Resistance Sourcing121
- Frequency Sourcing122
- Temperature, Thermocouples123
- Temperature, Resistance Temperature Detectors126
- Loop Power Supply128
- Top and Bottom Limits of Ranges with Auto Range on129
- General Specifications131
Index135

Fluke 744 - Loop Power Supply

Table of Contents

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