Fluke 773-II User manual

772/773/773-II English Instruction Sheet
Page 1
772/773/773-II
Milliamp Process Clamp Meter
Instruction Sheet
Introduction
The hand-held, battery-operated Fluke 772/773/773-II Milliamp Process
Clamp Meters (the Meter or Product) 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 mA to 24 mA dc and up to 99.9 mA dc
using a remotely connected clamp via extension cable
•0 mA to 24 mA dc sourcing and simulating
•0 V to 10 V dc sourcing (773/773-II)
•Loop power supply 24 V dc output
•0 V to 30 V dc measurement (773/773-II)
•Scaled mA output (773/773-II)
•Simultaneous mA measurement via detachable clamp and mA
sourcing (773/773-II)
•250 ΩHART resistor for mA source
•Electronic zero
•Percentage span (0 % to 100 %)
•Hold
•Auto power off (battery saver)
•Display
backlight
•Measurement spotlight LED
PN 3351049
February 2009 Rev. 2, 6/23
© 2009-2023 Fluke Corporation. All rights reserved.
All product names are trademarks of their respective companies. Specifications are subject to
change without notice.

772/773/773-II English Instruction Sheet
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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
Fluke Corporation operates worldwide. For local contact information, go
to our website: www.fluke.com
To register your product, view, print, or download the latest manual or
manual supplement, go to our website.
[phone]
[email protected]
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.
Safety Information and Symbols
A Warning identifies conditions and procedures that are dangerous to
the user. A Caution identifies conditions and procedures that can cause
damage to the Product or the equipment under test.
XW Warning
To prevent possible electrical shock, fire, or personal
injury:
•Carefully read all instructions.
•Do not alter the Product and use only as specified, or
the protection supplied by the Product can be
compromised.
•Read all safety information before you use the
Product.
•Do not use in CAT III or CAT IV environments without
the protective cap installed on test probe. The
protective cap decreases the exposed probe metal to
<4 mm. This decreases the possibility of arc flash
from short circuits.

772/773/773-II English Instruction Sheet
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•Comply with local and national safety codes. Use
personal protective equipment (approved rubber
gloves, face protection, and flame-resistant clothes)
to prevent shock and arc blast injury where
hazardous live conductors are exposed.
•Do not touch voltages >30 V ac rms, 42 V ac peak, or
60 V dc.
•Remove the batteries if the Product is not used for an
extended period of time, or if stored in temperatures
above 50 °C. If the batteries are not removed, battery
leakage may result.
•The battery door must be closed and locked before
you operate the Product.
•Replace the batteries when the low battery indicator
shows to prevent incorrect measurements.
•Do not apply more than the rated voltage, between the
terminals or between each terminal and earth ground.
•Measure a known voltage first to make sure that the
Product operates correctly.
•Use the Clamp only on insulated conductors. Use
caution around bare conductors or bus bars. To
prevent electrical shock, do not touch the conductor.
•Do not use test leads if they are damaged. Examine
the test leads for damaged insulation, exposed metal,
or if the wear indicator shows. Check test lead
continuity.
•Hold the Product behind the tactile barrier.
•Keep fingers behind the finger guards on the probes.
•Remove all probes, test leads, and accessories before
the battery door is opened.
•Remove all probes, test leads, and accessories that
are not necessary for the measurement.
•Do not exceed the Measurement Category (CAT)
rating of the lowest rated individual component of a
Product, probe, or accessory.
•Do not use the Product if it operates incorrectly.
•Disable the Product if it is damaged.
•Do not make connections on hazardous live
conductors in damp or wet environments.

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Table 1 explains the symbols that are used on the Meter or in this
Instruction Sheet.
Table 1. Symbols
Symbol Explanation
»Consult user documentation.
WWARNING. RISK OF DANGER.
XWARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
OPower on/off
-
Do not apply around or remove from uninsulated hazardous
live conductors without taking additional protective
measures.
TDouble Insulated
¨ Avoid strong magnetic fields.
JEarth Ground
BBattery
PConforms to European Union directives.
¼
Measurement Category II is applicable to test and measuring
circuits connected directly to utilization points (socket outlets
and similar points) of the low-voltage MAINS installation.
½
Measurement Category III is applicable to test and
measuring circuits connected to the distribution part of the
building’s low-voltage MAINS installation.
¾
Measurement Category IV is applicable to test and
measuring circuits connected at the source of the building’s
low-voltage MAINS installation.
~
This product complies with the WEEE Directive and its
marking requirements. The affixed label indicates that you
must not discard this electrical/electronic product in domestic
household waste. Do not dispose of this product as unsorted
municipal waste. For information about take-back and
recycling programs available in your country, see the Fluke
website.

772/773/773-II English Instruction Sheet
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Getting Acquainted with the Meter
Figures 1-4 explain the Meter’s features, buttons, input/output jacks, and
display.
HA RT
mA SCALELOOP PWR
mA I N / OUT
Fjv06.emf
Number Description
ATurn on and off the Meter
BMeasurement spotlight LED button
CTurns the display backlight on and off
D
Switches the Meter to Clamp Measure mode. Zeros the clamp
reading in Clamp mode. The Clamp modes includes clamp
measure, mA scale output, and mA IN/OUT.
Press Nfirst to change to mA scale (773/773-II).
E
Cycles through source output ramping and 25 % stepping:
() Slow repeating 0 % - 100 % - 0 % ramp
() Fast repeating 0 % - 100 % - 0 % ramp
() Repeating 0 % - 100 % - 0 % ramp in 25 % steps
Press Nfirst to activate mA IN/OUT (773/773-II).
FCaptures and holds the current reading. Pressing Nfirst
activates the 250 ΩHART resistor.
GNactivates features listed above some buttons
H
0 %-100 %- sets voltage or mA sourcing output. Press Nfirst to
activate U, V, X, and Wto adjust the source output. Long press
Gor Dto set span range point.
IMeasure, Source, Simulate button
JDC Volts selection (773/773-II)
KmA selection. Press Nfirst to activate Loop Power function.
Figure 1. Buttons

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
fjv05.emf
Number Description
ADetachable clamp
BTactile Barrier docked and un-docked. Refer to Safety Information
and Symbols.
CDisplay
DMeasurement spotlight LED
Figure 2. The Milliamp Process Clamp Meter

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MAX
Fjv07.emf
Number Description
AMain display values
BHOLD is activated
CClamp is active
DTest lead jack indicator. Test lead connection is required.
EHART 250 Ωresistor is engaged
FShift is active
GReading is scaled
HLoop Power is active
IMilliamps
JVolts dc
KPercentage
LSecondary display
MRamping is engaged
NLow battery symbol
OMaximum voltage warning
PHigh voltage is present
QMeasure, Source, or Simulate is active
Figure 3. Display (773/773-II shown)

772/773/773-II English Instruction Sheet
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Fjv04.emf
Number Description
AVoltage measurement test lead input, also used for voltage
sourcing HI.
BCommon 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.
ECommon test lead input. -mA test lead input. Also used for mA
sourcing.
Figure 4. Input/Output Jacks
Features
The following sections give more detail about the Meter’s features.
Percentage Span
The Source and Simulate Percentage Span feature displays the span for
4 to 20 mA loops. Use G, F, E, and Dto adjust the source
or simulated current (772) or dc voltage and current (773/773-II).
20 mA 100 % 8 mA 25 %
16 mA 75 % 4 mA 0 %
12 mA 50 % 0 mA -25 %
Zero Adjust
Before taking measurements with the clamp, push Cto zero the
display by removing the offset. Make sure the clamp jaws are closed and
no current is flowing through them before zeroing.
Backlight
Press Qto turn the backlight on and off. The backlight automatically
turns off after 2 minutes.

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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:
•Qtoggle on/off backlight auto off. Display shows bLit on or oFF.
•Atoggle on/off spotlight auto off. Display shows SLit on or oFF.
•Htoggle on/off auto power off. Display shows PoFF on or oFF.
When all key are released, the software version appears and the Meter
enters Clamp Measure mode.
Measurement Spotlight LED
The Measurement Spotlight LED helps to quickly find mA signal wires.
Press Ato activate it. To extend battery life, the light automatically turns
off after 2 minutes.
Display HOLD XW Warning
To prevent possible electrical shock, fire, or personal
injury:
•Be aware of the measurement being taken when using
Display HOLD. When Display HOLD is activated, the
display will not change when different currents are
applied.
•Do not use the HOLD function to measure unknown
potentials. When HOLD is turned on, the display does
not change when a different potential is measured.
Press Hto activate Display Hold mode. The display shows Iand
the display freezes. To exit and return to normal operation, press Ha
second time. When in Auto Ramping mode, Hstops ramping.
Auto Ramping the Output
Auto ramping can continuously apply a varying output from the mA
source to a device while your hands remain free to test the response.
When Kis pressed, the Meter produces a repeating 0 % - 100 % -
0 % ramp in a choice of three ramp waveforms:
•() 0 % - 100 % - 0 % 40-second smooth ramp
•() 0 % - 100 % - 0 % 30-second smooth ramp
•() 0 % - 100 % - 0 % 25 % step ramp, 10 seconds each step.
To exit ramping, press any button.

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Probe Holder
The Meter is equipped with a probe holder that can either hold a test
probe or can be used to attach the Fluke ToolPak. See Figure 5.
Fjv08.emf
Figure 5. The Probe Holder
Taking Measurements
XW Warning
To prevent possible electric shock, fire, or personal injury,
do not use the clamp on non-insulated 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.
•To reduce magnetic influences, zero the Meter as close to the
measurement in the same position or jaw direction that is used for
the measurements as possible.
•Make sure the clamp is free of contamination.
To use the clamp for measurements:
1. Press Cto enter Clamp Measure mode and to zero the Meter.
Clamp mode includes clamp measure, mA scale output, and mA
IN/OUT. If necessary, press Nto change to mA scale.
2. Clamp the jaw around the conductor under test. The Meter displays
the measured conductor current. See Figure 6.
•A positive reading indicates current flowing in the direction of
the arrow on the clamp.
•A negative reading indicates current flowing in the opposite
direction of the arrow.
•Do not clamp more than one wire.
The small secondary display shows the reading in mA percentage of
span.