User Manual

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772/773 English Instruction Sheet

Page 1

772/773

Milliamp Process Clamp Meter

Instruction Sheet

Introduction

The hand-held, battery-operated Fluke 772 and 773 Milliamp Process

Clamp Meters (the Meter) can be used in troubleshooting transmitters,

valves, PLC and DCS I/O. Unlike conventional clamp meters, the Meter

features a remote jaw that is connected to the main body via extension

cable.

Features

• In-circuit measurement of 0-24 mA dc and up to 99.9 mA dc using a

remotely connected clamp via extension cable

• 0-24 mA dc sourcing and simulating

• 0-10 V dc sourcing (773)

• Loop power supply 24 V dc output

• 0-30 V dc measurement (773)

• Scaled mA output (773)

• Simultaneous mA measurement via detachable clamp and mA

sourcing (773)

• 250 Ω HART resistor for mA source

• Electronic zero

• Percentage span (0-100 %)

• Hold

• Auto power off (battery saver)

• Display backlight

• Measurement spotlight LED

PN 3351049

February 2009

All product names are trademarks of their respective companies. Specifications are subject to

change without notice. Printed in China.

Summary of content (16 pages)

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772/773 English Instruction Sheet Page 1 ® 772/773 Milliamp Process Clamp Meter Instruction Sheet Introduction The hand-held, battery-operated Fluke 772 and 773 Milliamp Process Clamp Meters (the Meter) can be used in troubleshooting transmitters, valves, PLC and DCS I/O. Unlike conventional clamp meters, the Meter features a remote jaw that is connected to the main body via extension cable. Features • In-circuit measurement of 0-24 mA dc and up to 99.
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772/773 English Instruction Sheet Page 2 The Meter comes with: • Four AA alkaline batteries (installed) • Soft carrying case • TL75 test leads • AC 72 detachable clip • TL 940 mini hook test leads • Instruction sheet Contacting Fluke To contact Fluke, call one of the following telephone numbers: • Technical Support USA: 1-800-44-FLUKE (1-800-443-5853) • Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853) • Canada: 1-800-36-FLUKE (1-800-363-5853) • Europe: +31 402-675-200 • Japan: +81-3-3434-0
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772/773 English Instruction Sheet Page 3 • Use extreme caution when working around bare conductors or bus bars. Contact with the conductor could result in electric shock. • To avoid false readings that can lead to electrical shock and injury, replace the batteries as soon as the low battery indicator B appears. • Adhere to local and national safety codes. Individual protective equipment must be used to prevent shock and arc blast injury where hazardous live conductors are exposed.
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772/773 English Instruction Sheet Page 4 Getting Acquainted with the Meter Figures 1-4 explain the Meter’s features, buttons, input/output jacks, and display. 2 1 3 11 LOOP PWR mA SCALE 4 mA IN/OUT 10 5 HART 6 9 8 7 Fjv06.eps Number Description A Turns the Meter on and off B Measurement spotlight LED button C D E F Turns the display backlight on and off Switches the Meter to Clamp Measure mode. Zeros the clamp reading in Clamp mode.
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772/773 English Instruction Sheet Page 5 2 1 4 773 MILLIAMP PROCESS CLAMP METER 3 Fjv05.eps Number Description A Detachable clamp B Tactile Barrier docked and un-docked. Refer to “Safety Information and Symbols”. C Display D Measurement spotlight LED Figure 2.
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772/773 English Instruction Sheet Page 6 3 1 2 4 5 6 7 17 8 9 16 MAX 10 15 11 14 12 13 Fjv07.eps Number Description A Main display values B HOLD is activated C Clamp is active D Test lead jack indicator. Test lead connection is required.
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72/773 English Instruction Sheet Page 7 773 4 3 772 2 1 4 5 Fjv04.eps Number Description A Voltage measurement test lead input, also used for voltage sourcing HI. B Common test lead input, also used for voltage sourcing LO. C -mA test lead input, also used for mA sourcing. D +mA test lead input, also used for mA sourcing. E Common test lead input. -mA test lead input. Also used for mA sourcing. Figure 4.
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772/773 English Instruction Sheet Page 8 User Options Several user options can be activated at Meter power up. Hold N when powering on the Meter. While holding down N, toggle on/off each option by repeatedly pressing the following keys: • Q toggle on/off backlight auto off. Display shows bLit on or oFF. • A toggle on/off spotlight auto off. Display shows SLit on or oFF. • H toggle on/off auto power off. Display shows PoFF on or oFF.
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772/773 English Instruction Sheet Page 9 Taking Measurements XW Warning To avoid electric shock, do not use the clamp on noninsulated conductors. Measurements can be taken with the clamp in the docked position, remotely using the 1 m cable, or via test leads. For accurate measurements: • Always zero the Meter prior to taking measurements with the clamp.
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772/773 English Instruction Sheet Page 10 To use the test leads for measurements: 1. Insert the test leads into the proper input jacks. See Figure 7. 2. Press the correct button for the measurement. 3. Apply the test leads. 4. Observe the reading on the main display. In mA mode, the secondary display shows the reading in percentage of span. LOOP PWR mA SCALE mA IN/OUT HART fjv09.eps Figure 7.
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772/773 English Instruction Sheet Page 11 To enter mA Source mode for the 773, see Figure 8: 1. Insert the test leads into the desired input jacks. 2. Press L. 3. Press T until Source appears on the display. Fjv10.eps Figure 8. Sourcing mA Output Simulating mA Output In Simulate mode, the Meter simulates a current loop transmitter. To enter Simulate mode, see Figure 9: 1. Insert the test leads into the mA+ and mA- input jacks. 2. Press L. 3. Press T until Simulate appears on the display.
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772/773 English Instruction Sheet Page 12 + Fjv11.eps Figure 9. Simulating mA Output Loop Supply In Loop Supply mode, the Meter powers a transmitter while measuring the mA signal. To enter Loop Supply mode, see Figure 10: 1. Insert the test leads into the LOOP PWR jacks. See Figure 10. 2. Press N. 3. Press L. The Meter is now in Loop Supply mode. Fjv13.eps Figure 10.
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772/773 English Instruction Sheet Page 13 Maintenance XW Warning To avoid possible electric shock or personal injury, repairs or servicing not covered in this manual should be performed only by qualified personnel. Cleaning the Meter XW Warning To avoid electrical shock, remove any input signals before cleaning. W Caution To avoid damaging the Meter, do not use aromatic hydrocarbons or chlorinated solvents for cleaning. These solutions will react with the plastics used in the Meter.
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772/773 English Instruction Sheet Page 14 Specifications Electrical Specifications Current Measurement With Jaw Ranges ................................ 0-20.99 mA; 21-100 mA Resolution............................ 0.01 mA; 0.1 mA Accuracy.............................. 0.2 % + 5 counts;1 % + 5 counts In Circuit Range .................................. 0-24 mA Resolution............................ 0.01 mA Accuracy.............................. 0.2 % + 2 counts Current Source Range ...........................
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772/773 English Instruction Sheet Page 15 Environmental Specifications Operating Temperature ............. -10 ~50 °C Storage Temperature................. -25 ~60 °C Operating Humidity .................... <90 % RH @ <30 °C ;<75 % RH @ 30 ~50 °C Operating Altitude ...................... 0 ~ 2000 m IP Rating.................................... IP 40 Vibration Requirements ............. Random 2 g, 5 to 500 Hz Drop Test Requirements ............1 meter drop test (except the jaw) EMI, RFI, EMC ...............
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772/773 English Instruction Sheet Page 16 User Replaceable Parts Table 2 lists all user replaceable parts. Table 2. Replaceable Parts Part or Model Number Description Quantity 376756 AA Batteries, 1.