Fluke 772 User manual

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 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)
•Loop power supply 24 V dc output
•0 V to 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 % to 100 %)
•Hold
•Auto power off (battery saver)
•Display backlight
•Measurement spotlight LED
PN 3351049
February 2009 Rev. 1, 5/19
© 2009-2019 Fluke Corporation. All rights reserved.
All product names are trademarks of their respective companies. Specifications are subject to
change without notice.

772/773 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
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]
• China: [phone]
• Brazil: [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.
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 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.

772/773 English Instruction Sheet
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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.
W WARNING. RISK OF DANGER.
X WARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
 Power on/off
-
Do not apply around or remove from uninsulated hazardous
live conductors without taking additional protective
measures.
T Double Insulated
 DC (Direct Current)
 Earth Ground
 Battery
P Conforms to European Union directives.
 Conforms to relevant Australian Safety and EMC standards.
) Certified by CSA Group to North American safety standards.

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.

Measurement Category III is applicable to test and
measuring circuits connected to the distribution part of the
building’s low-voltage MAINS installation.

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 marking
requirements. The affixed label indicates that you must not
discard this electrical/electronic product in domestic
household waste. Product Category: With reference to the
equipment types in the WEEE Directive Annex I, this product
is classed as category 9 "Monitoring and Control
Instrumentation" product. Do not dispose of this product as
unsorted municipal waste.

772/773 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.
HART
mA SCALELOOP PWR
mA I N / OUT
Fjv06.emf
Number Description
 Turn on and off the Meter
 Measurement spotlight LED button
 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
measure, mA scale output, and mA IN/OUT.
Press  first to change to mA scale (773).

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  first to activate mA IN/OUT (773).
 Captures and holds the current reading. Pressing  first
activates the 250 Ω HART resistor.
  activates features listed above some buttons

0 %-100 %- sets voltage or mA sourcing output. Press  first to
activate , , , and  to adjust the source output. Long press
 or  to set span range point.
 Measure, Source, Simulate button
 DC Volts selection (773)
 mA selection. Press  first to activate Loop Power function.
Figure 1. Buttons

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fjv05.emf
Number Description
 Detachable clamp
 Tactile Barrier docked and un-docked. Refer to Safety Information
and Symbols.
 Display
 Measurement spotlight LED
Figure 2. The Milliamp Process Clamp Meter

772/773 English Instruction Sheet
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MAX
Fjv07.emf
Number Description
 Main display values
 HOLD is activated
 Clamp is active
 Test lead jack indicator. Test lead connection is required.
 HART 250 Ω resistor is engaged
 Shift is active
 Reading is scaled
 Loop Power is active
 Milliamps
 Volts dc
 Percentage
 Secondary display
 Ramping is engaged
 Low battery symbol
 Maximum voltage warning
 High voltage is present
 Measure, Source, or Simulate is active
Figure 3. Display (773 shown)

772/773 English Instruction Sheet
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Fjv04.emf
Number Description
 Voltage measurement test lead input, also used for voltage
sourcing HI.
 Common test lead input, also used for voltage sourcing LO.
 -mA test lead input, also used for mA sourcing.
 +mA test lead input, also used for mA sourcing.
 Common 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 , , , and  to adjust the source
or simulated current (772) or dc voltage and current (773).
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  to 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  to turn the backlight on and off. The backlight automatically
turns off after 2 minutes.

772/773 English Instruction Sheet
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User Options
Several user options can be activated at Meter power up. Hold 
when powering on the Meter. While holding down , toggle on/off
each option by repeatedly pressing the following keys:
•  toggle on/off backlight auto off. Display shows bLit on or oFF.
•  toggle on/off spotlight auto off. Display shows SLit on or oFF.
•  toggle 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  to 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  to activate Display Hold mode. The display shows  and
the display freezes. To exit and return to normal operation, press  a
second time. When in Auto Ramping mode,  stops 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  is 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  to enter Clamp Measure mode and to zero the Meter.
Clamp mode includes clamp measure, mA scale output, and mA
IN/OUT. If necessary, press  to 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.

772/773 English Instruction Sheet
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OK
fjv03.emf
Figure 6. Taking Measurements with the Clamp
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.
HA RT
mA SCALELOOP PWR
mA I N/ OUT
fjv09.emf
Figure 7. Taking Measurements with the Test Leads
Current and Voltage Output Functions
Both Meters provide steady, stepped, and ramped current output for
testing 0-24 mA current loops. Additionally, the 773 provides voltage
output to 10 V. To access these functions, press  as necessary.
• Choose Source mode to supply current or voltage.
• Choose Simulate mode to regulate current in an externally powered
current loop.
• Choose Loop Supply mode to power an external device and
measure mA loop current.

772/773 English Instruction Sheet
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Sourcing mA
Use mA Source mode whenever it is necessary to source current into a
passive circuit such as a current loop with no loop supply. Source mode
depletes the battery faster than Simulate mode.
To enter Source mode for the 772, see Figure 4:
1. Insert the test leads into the -mA and +mA jacks.
2. Press .
3. Press  until Source appears on the display.
To enter mA Source mode for the 773, see Figure 8:
1. Insert the test leads into the desired input jacks.
2. Press .
3. Press  until Source appears on the display.
Fjv10.emf
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 .
3. Press  until Simulate appears on the display.

772/773 English Instruction Sheet
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+
Fjv11.emf
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 .
3. Press .
The Meter is now in Loop Supply mode.
Fjv13.emf
Figure 10. Using Loop Supply Mode

772/773 English Instruction Sheet
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Maintenance XW Warning
To prevent possible electric shock, fire, or personal injury:
• Remove the input signals before you clean the
Product.
• Repairs or servicing not covered in this manual
should be performed only by qualified personnel.
• Replace all batteries with fresh batteries of the same
manufacturer and type to prevent battery leakage.
Cleaning the Meter W Caution
To prevent damage to the Meter, do not use aromatic
hydrocarbons or chlorinated solvents for cleaning. These
solutions will react with the plastics used in the Meter.
Clean the instrument case with a damp cloth and mild detergent.
Battery Replacement
XW Warning
To avoid false readings, that could lead to possible electric
shock or personal injury, replace the batteries as soon as
the low battery indicator () appears.
To replace the batteries, see Figure 11:
1. Turn the Meter off.
2. Use a flat head screwdriver to loosen the battery compartment door
screw, and remove the door from the case bottom.
3. Remove the batteries.
4. Replace the batteries with four new AA batteries.
5. Reattach the battery compartment door to the case bottom and tighten
the screw.
fjv02.emf
Figure 11. Changing the Batteries

772/773 English Instruction Sheet
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Specifications
Electrical Specifications
DC Current Measurement
With Jaw
Ranges ............................................... 0 mA to 20.99 mA;
21 mA to 100 mA
Resolution........................................... 0.01 mA, 0.1 mA
Accuracy ............................................. 0.2 % + 5 counts, 1 % + 5 counts
In Circuit
Range ................................................. 0 mA to 24 mA
Resolution........................................... 0.01 mA
Accuracy ............................................. 0.2 % + 2 counts
Current Source
Range ................................................. 0 mA to 24 mA
Resolution........................................... 0.01 mA
Accuracy ............................................. 0.2 % + 2 counts
mA Drive ............................................. 24 mA into 1000 Ω
Current Simulate
Range ................................................. 0 mA to 24 mA
Resolution........................................... 0.01 mA
Accuracy ............................................. 0.2 % + 2 counts
Maximum Voltage ............................... 50 V
DC Voltage Measurement (773)
Range ................................................. 0 V to 30 V
Resolution........................................... 0.01 V
Accuracy ............................................. 0.2 % + 2 counts
DC voltage source (773)
Range ................................................. 0 V to 10 V
Resolution........................................... 0.01 V
Accuracy ............................................. 0.2 % + 2 counts
mA Drive ............................................. 2 mA max all conditions
mA IN/OUT (773)
Sourcing range ................................... 0 mA to 24 mA
Sourcing resolution ............................. 0.01 mA
Sourcing accuracy .............................. 0.2 % + 2 counts
Measurement range ........................... 0 mA to 24 mA
Measurement resolution ..................... 0.01 mA
Measurement accuracy ...................... 1 % FS
Scaled mA current output to mA current input from the Jaw (773)
Range ................................................. 0 mA to 24 mA
Resolution........................................... 0.01 mA
Accuracy ............................................. 1 % FS

772/773 English Instruction Sheet
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Response speed ......................................... 2x/second
DC Loop Power ........................................... 24 V
Influence of Earth’s Field ............................. <0.20 mA
Batteries ...................................................... 4 1.5 V, Alkaline, IEC LR6
Working hours ............................................. 12 hours @ 12 mA sourced into
500 Ω
Mechanical Specifications
Size (H X W X L) ......................................... 43.7 mm x 70 mm x 246.2 mm
Weight ......................................................... 410 g
Environmental Specifications
Operating Temperature ............................... -10 °C to 50 °C
Storage Temperature .................................. -25 °C to 60 °C
Operating Humidity ..................................... <90 % RH @ <30 °C
<75 % RH @ 30 °C to 50 °C
Operating Altitude ....................................... 0 m to 2000 m
IP Rating ..................................................... I P 4 0
Temperature Coefficients ............................ 0.1 (/ °C X Specified accuracy for
Temperature <18 °C or >28 °C)
Safety .......................................................... IEC 61010-1, Pollution degree 2
IEC 61010-2-032: O, other circuits
not directly connected to mains.
Electromagnetic Compatibility (EMC)
International ................................................ IEC 61326-1: Portable
Electromagnetic Environment
IEC 61326-2-2
CISPR 11: Group 1, Class A
Group 1: Equipment has intentionally generated and/or uses
conductively-coupled radio frequency energy that is necessary for the
internal function of the equipment itself.
Class A: Equipment is suitable for use in all establishments other than
domestic and those directly connected to a low voltage power supply
network that supplies buildings used for domestic purposes. There
may be potential difficulties in ensuring electromagnetic compatibility
in other environments due to conducted and radiated disturbances.
Caution: This equipment is not intended for use in residential
environments and may not provide adequate protection to radio
reception in such environments.
Emissions that exceed the levels required by CISPR 11 can occur
when the equipment is connected to a test object.
The equipment may not meet the immunity requirements of this
standard when test leads and/or test probes are connected.
For current measurement with jaw, add 1 mA to specification for EMC
fields from 1 V/m to 3 V/m.

772/773 English Instruction Sheet
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Miscellaneous Specifications
Power Requirements ................................... Four AA batteries, Alkaline,
IEC LR6
Automatic Time-out (Power)........................ 15 minutes ±1 minute
Automatic Time-out (Backlight) ................... 2 minutes ±10 seconds
Automatic Time-out
(Measurement Spotlight) ............................. 2 minutes ±10 seconds
User Replaceable Parts
Table 2 lists all user replaceable parts.
Table 2. Replaceable Parts
Part or Model
Number Description Quantity
376756 AA Batteries, 1.5 V 4
3369914 Absorber 1
3350978 Battery Door 1
948609 Fastener 2
3351060 Soft Carrying Case 1
download from
www.fluke.com Instruction Sheet 1
download from
www.fluke.com Calibration Manual 1
1616705 TL940 Mini Hook with Test Lead 1 Set
855742 TL75- Test Leads 1 Set
4101772 AC175 Alligator Clips 1 Set
3031302 Hook and Loop Strip 1
669967 TPAK, Strap 17 inches 1
3375746 Hanger 1
Replacement clamp and cable assembly are available but require re-
calibration. See the 772/773 Calibration Manual for part numbers
and procedures.

772/773 English Instruction Sheet
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LIMITED WARRANTY & LIMITATION OF LIABILITY
This Fluke product will be free from defects in material and workmanship
for 3 years (one year for cable and clamp) from the date of purchase.
This warranty does not cover fuses, disposable batteries or damage from
accident, neglect, misuse or abnormal conditions of operation or handling.
Resellers are not authorized to extend any other warranty on Fluke’s
behalf. To obtain service during the warranty period, send your defective
product to the nearest Fluke Authorized Service Center with a description
of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER
WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR PURPOSE,
ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY
SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES
OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some
states or countries do not allow the exclusion or limitation of an implied
warranty or of incidental or consequential damages, this limitation of
liability may not apply to you.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
ООО «Флюк СИА
Й
ЭС»
125167, г. Москва,
Ленинградский проспект дом 37,
корпус 9, подъезд 4, 1 этаж
11/99