Fluke 773, 772 Operating Manual

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
© 2009 Fluke Corporation. All rights reserved.

All product names are trademarks of their respective companies. Specif icatio ns are sub ject to
change without notice. Printed in China.

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: [phone]

• Japan: [phone]

• Singapore: [phone]

• Anywhere in the world: [phone]

Or, visit Fluke's website at www.fluke.com
To register your product, visit http://register.fluke.com
To view, print, or download the latest manual supplement, visit

http://us.fluke.com/usen/support/manuals

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Safety Information and Symbols

A Warning statement identifies hazardous conditions and actions that
could cause bodily harm or death.

A Caution statement identifies conditions and actions that could damage
the Meter or the equipment under test.

XW Read First: Safety Information

To ensure safe operation and service of the Meter, follow
these instructions:

• Read the Instruction Sheet before use and follow all

safety instructions.

• Use the Meter only as specified in the Instruction

Sheet; otherwise, the Meter's safety features may be
impaired.

• Before each use, inspect the Meter and cable for

damage. Look for cracks and missing portions of the
clamp and cable. Do not use if clamp is damaged.

• Use caution when working with voltages above 33 V

rms 47 V peak or 70 V dc these voltages pose a shock
hazard.

• Do not use to measure ac current.

• Do not use to measure ac voltage.

• Avoid working alone so assistance can be rendered in

an emergency.

• 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.

• When measuring, keep fingers behind the Tactile

Barrier. See Figure 1.

• Do not use on non-insulated conductors.

• Do not use near strong magnetic fields.

• Remove test leads before opening case.

Table 1 explains the symbols that are used on the Meter or in this
Instruction Sheet.

Table 1. Symbols

Symbol Explanation

-

W
X

T

B

P
F DC (Direct Current)

J Earth Ground

~

Do not apply around, or remove from HAZARDOUS LIVE
conductors.

Risk of danger. Important information. See Users Manual.

Risk of Electrical Shock.

Equipment protected by double or reinforced insulation.

Battery

Conforms to relevant European Union directives.

Do not dispose of this product as unsorted municipal waste.
Go to Fluke’s website for recycling information.

;

)

Conforms to relevant Australian standards.

Conforms to relevant Canadian and US standards.

Getting Acquainted with the Meter

Figures 1-4 explain the Meter’s features, buttons, input/output jacks, and
display.

HART

2

7

3

4

5

6

Fjv06.eps

1

11

10

9

mA SCALELOOP PWR

mA IN/OUT

8

Number Description

A Turns the Meter on and off

B Measurement spotlight LED button

C Turns the display backlight on and off

Switches the Meter to Clamp Measure mode. Zeros the clamp
reading in Clamp mode. The Clamp modes includes clamp

D

measure, mA scale output, and mA IN/OUT.
Press N first to change to mA scale (773).
Cycles through source output ramping and 25 % stepping:
() Slow repeating 0 % - 100 % - 0 % ramp

E

() Fast repeating 0 % - 100 % - 0 % ramp
() Repeating 0 % - 100 % - 0 % ramp in 25 % steps
Press N first to activate mA IN/OUT (773).
Captures and holds the current reading. Pressing N first

F

activates the 250 Ω HART resistor.

G N activates features listed above some buttons

0 %-100 %- sets voltage or mA sourcing output. Press N first to

H

activate U, V, X, and W to adjust the source output. Long press
G or D to set span range point.

I Measure, Source, Simulate button

J DC Volts selection (773)

K mA selection. Press N first to activate Loop Power function.

Figure 1. Buttons

4

1

773

MILLIAMP PROCESS
CLAMP METER

2

3

Fjv05.eps

Number Description

A Detachable clamp

Tactile Barrier docked and un-docked. Refer to “Safety Information

B

and Symbols”.

C Display

D Measurement spotlight LED

Figure 2. The Milliamp Process Clamp Meter