Fluke 773-II Bedienungsanleitung

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

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

change without notice.

772/773/773-II 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

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.

+1-425-446-5500

[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

Page 3

•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.

772/773/773-II English Instruction Sheet

Page 4

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.

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 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

Page 5

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

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).

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

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

772/773/773-II English Instruction Sheet

Page 6



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

772/773/773-II English Instruction Sheet

Page 7

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

Page 8

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.

772/773/773-II English Instruction Sheet

Page 9

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.

772/773/773-II English Instruction Sheet

Page 10

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.

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