Fluke 707 Manuale utente

English Instruction SheetPanel 1

707

Loop Calibrator

Instruction Sheet

Introduction

The Fluke 707 Loop Calibrator (hereafter, the Calibrator) is a

compact sourcing and measuring tool. The Calibrator tests current

loops of 0-20 mA or 4-20 mA and measures dc voltage to 28 V. It

comes with a set of alligator-clip test leads, a 9 V alkaline battery,

and this Instruction Sheet.

The Calibrator is a IEC 61010, CAT I 30 V, Pollution Degree 2

instrument. A CAT I instrument is designed to protect against

transients from high-voltage, low-energy sources, like electronic

circuits or a copy machine, for example.

Calibrator Capabilities

Function Range Resolution

Measure V dc 28 V 1 mV

Measure mA dc

Source mA dc 0 to 24 mA 1 μA

Source loop power 24 V dc N/A

Battery Saver

The Calibrator automatically turns off after 30 minutes of inactivity.

To reduce this time or disable this feature:

1. With the Calibrator OFF, press D.

PSXX is displayed, where XX is the turn-off time in minutes.

OFF means the power saver is disabled.

2. Turn mto decrease or increase the turn-off time.

To disable, turn muntil the display shows OFF.

3. The Calibrator resumes normal operation after 2 seconds.

August 2001 (English) Rev. 2, 2/08

English Instruction SheetPanel 2

WWarnings and Cautions

To avoid electric shock, injury, or damage to the

Calibrator:

•Use the Calibrator only as described in this

Instruction Sheet or the protection provided by the

Calibrator may be impaired.

•Do not use the Calibrator around explosive gas,

vapor, or dust.

•Inspect the Calibrator before use. Do not use it if

appears damaged.

•Check the test leads for continuity, damaged

insulation, or exposed metal. Replace damaged

test leads.

•Never apply more than 30 V between any two

terminals, or between any terminal and earth

ground.

•Use the proper terminals, mode, and range for your

measuring or sourcing application.

•To prevent damage to the unit under test, put the

Calibrator in the correct mode before connecting

the test leads.

•When making connections, connect the COM test

lead before the live lead; when disconnecting,

disconnect the live lead before the COM lead.

•Never use the Calibrator with the case open.

•Make sure the battery door is closed before you

use the Calibrator.

•Replace the battery as soon as the M(low battery)

symbol appears to avoid false readings that can

lead to electric shock.

•Remove test leads from the Calibrator before

opening the case or battery door.

Symbols

Symbol Meaning

+ON / OFF button.

JEarth ground

WCaution: Important information. Refer to instruction sheet

hCaution: Static discharge can damage parts

TDouble insulated

MBattery

)Conforms to relevant Canadian Standards Association

directives. Certification # LR110460-2.

PConforms to European Union requirements

FDirect current

~Do not dispose of this product as unsorted municipal

waste. Go to Fluke’s web site for recycling information.

English Instruction SheetPanel 3

Pushbutton Functions

Pushbutton Function

DON or OFF button.

A+ D

(Power-on Option)

Press Aand Dsimultaneously to toggle

between the mA output spans.

•4 mA to 20 mA = 0 % - 100 % (default)

•0 mA to 20 mA = 0 % - 100 % (optional)

The selection is saved until it is changed.

l+ D

(Power-on Option)

Press l+ Dsimultaneously to turn HART

resistor (Hr) on. Default is off.

APress to step through modes:

•Source mA

•Simulate mA

•Measure mA

•Loop Power (24 V)

•Measure V dc

hij

Turn nto increase or decrease current output.

Current output can be adjusted at a resolution of

1 μA or 100 μA. (Default is 1 μA.)

•To adjust the current in 1 μA steps, simply

turn the knob.

•To adjust the current in 100 μA steps, press

in and turn the knob.

BPress Bto step the current up 25 % of full

scale (20 mA).

At full scale, press Bto step the current down

25 % of full scale.

B+ CPress B+Csimultaneously to enter the

Auto Ramp mode and select a ramp form.

A continuously applied or controlled mA ramping

signal is produced in one of three ramp forms.

e(slow), g(fast), or f(step) identifies the

selected ramp form.

CPress Cto start the SpanCheck™at 0 % of

selected current span, i.e., 0 mA for 0-20 mA span

or 4 mA for 4-20 mA span.

dis displayed.

Press again for 100 % of selected current span.

English Instruction SheetPanel 4

Using the mA Sourcing (Output) Modes

The Calibrator outputs current for calibrating and testing 0 to 20 mA

and 4 to 20 mA current loops and instruments.

In SOURCE mode, the Calibrator supplies the current.

In SIMULATE mode, the Calibrator simulates a 2-wire transmitter in

an externally-powered current loop.

Changing the mA Output Span

The Calibrator has two mA output spans:

•4 mA to 20 mA (0 % to 100 %) [default]

•0 mA to 20 mA (0 % to 100 %) [optional]

To change the output span, turn the Calibrator off. Press A+ D

simultaneously. The selected setting is saved until it is changed

again.

Sourcing mA

Use SOURCE mode to supply current to a passive circuit.

A path must exist for current to flow between the +and COM

terminals. Otherwise the display indicates an overload (OL) when

you set an output value.

COM

707

LOOP CALIBRATOR

30V

CAT

Press until SOURCE

mA is displayed.

Press to step current

up/down in 25 %

steps of full scale.

Turn to step up/down

1 A. Press in and

turn to step up/down

in 100 A increments.

Press simultaneously

once for slow ramp

twice for fast ramp

three times for

stepped ramp.

ADA04F.EPS

English Instruction SheetPanel 5

Contacting Fluke

To contact Fluke for product information, operating assistance,

service, or to get the location of the nearest Fluke distributor or

service center, call:

1-888-44-FLUKE (1-888-443-5853) in U.S.A

1-800-36-FLUKE in Canada

+31-402-675-200 in Europe

+81-3-3434-0181 Japan

+65-738-5655 Singapore

+1-425-446-5500 from other countries

Or visit Fluke's web site at: www.fluke.com.

Address correspondence to:

Fluke Corporation Fluke Europe B.V.

P.O. Box 9090, P.O. Box 1186,

Everett, WA 98206-9090 5602 BD Eindhoven

U.S.A. The Netherlands

Limited Warranty & Limitation Of Liability

This Fluke product will be free from defects in material and work-

manship for 3 years from the date of purchase. This warranty

does not cover fuses, disposable batteries, or damage from

accident, neglect, misuse, alteration, contamination, 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, contact your nearest Fluke authorized

service center to obtain return authorization information, then

send the product to that 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.

11/99

English Instruction SheetPanel 6

Simulating a Transmitter

When simulating the operation of a transmitter, the Calibrator

regulates the loop current to a known value selected by you.

A 12 V to 28 V loop supply must be available. Insert the test leads as

shown below.

Power

supply

30 V dc

max.

COM

707

LOOP CALIBRATOR

30V

CAT

Press until

SIMULATE mA is

displayed.

to step current

up or down 25 %

of full scale.

Press

Turn to step

up/down 0.1 A.

Press in and rotate

to step up/down in

100 A increments.

Press simultaneously

once for slow ramp

twice for fast ramp

three times for

stepped ramp.

ADA05F.EPS

English Instruction SheetPanel 7

Auto Ramping the mA Output

Auto ramping allows you to continuously apply a varying current from

the Calibrator to a passive (sourcing) or active (simulate) loop. Your

hands remain free to test the transmitter’s response.

Press B+ Csimultaneously to enter the Auto Ramp mode and

step to a ramp type.

The Calibrator applies or controls a continuously repeating mA signal

over a 0-20 mA or a 4-20 mA span in one of three ramp types:

Slow (e) 0 % to 100 % to 0 % smooth ramp over 40 sec.

Fast (g) 0 % to 100 % to 0 % smooth ramp over 15 sec.

Step (f) 0 % to 100 % to 0 % stair-step ramp in 25 % steps,

pausing 5 sec at each step.

To exit, press any pushbutton or turn the Calibrator off.

Using the SpanCheck Function

The SpanCheck™ function checks the zero and span points of a

transmitter in either SOURCE or SIMULATE mode.

To select SpanCheck, press C.

To exit, press any pushbutton or turn the knob.

Device under

test

30 V dc max.

COM

707

LOOP CALIBRATOR

30V

CAT

Put in SOURCE mA

or SIMULATE mA.

Press to start

SpanCheck at 0%.

Press again for 100%.

ADA02F.EPS

English Instruction SheetPanel 8

Measuring dc mA

WCaution

To prevent damage to the unit under test, ensure that the

Calibrator is in the correct mode before connecting the

test leads.

To measure dc mA:

1. Press Ato step to MEASURE mode.

MEASURE mA is displayed.

2. Touch test lead probes to the circuit across the load or power

source as shown below.

COM

707

LOOP CALIBRATOR

30V

CAT

Press until MEASURE

mA is displayed.

30 V dc max.

ADA03F.EPS

English Instruction SheetPanel 9

Measuring dc mA with Loop Power

WCaution

To prevent damage to the unit under test, ensure that the

Calibrator is in the correct mode before connecting the

test leads.

Loop power provides +24 V to power a transmitter and to read loop

current simultaneously.

To measure dc mA with Loop Power:

1. Press Ato step to Loop Power mode.

MEASURE mA and Loop Power are displayed.

2. Touch test lead probes to the circuit across the load or power

source as shown below.

To exit Loop Power, change measurement mode.

Two-wire

transmitter

30 V dc max.

COM

707

LOOP CALIBRATOR

30V

CAT

Press until Loop

Power is displayed.

+24 V output

ADA06F.EPS

English Instruction SheetPanel 10

Measuring dc Volts

WCaution

To prevent damage to the unit under test, ensure that the

Calibrator is in the correct mode before connecting the

test leads.

To measure dc Volts:

1. Press Ato step to MEASURE mode.

MEASURE V is displayed.

2. Touch test lead probes across the load or power source.

30 V dc max.

COM

707

LOOP CALIBRATOR

30V

CAT

Press until MEASURE

V dc is displayed.

ADA01F.EPS

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