Fluke 714 Manual de usuario

714 English Instruction Sheet

Page

714

Thermocouple Calibrator

Instruction Sheet

Introduction

The Fluke 714 Thermocouple Calibrator is a precise source and

measurement tool for calibrating thermocouple instruments. The

calibrator sources or measures in units of °C, °F, or mV, through

a thermocouple minijack.

Your calibrator is supplied with a Flex-Standholster, an

installed 9 V alkaline battery, and this instruction sheet. Sets of

thermocouple miniplugs are available from Fluke. (Accessories

Fluke-700TC1 and Fluke-700TC2 TC Miniplug Kits.)

If the calibrator is damaged or something is missing, contact the

place of purchase immediately. Contact your Fluke distributor for

information about accessories. To order replacement parts or

spares, see “Replacement Parts.”

The following tables list the thermocouple types supported by the

calibrator, the standards and scales used for each type, the

thermocouple properties, and calibrator resolution. Full calibrator

specifications are listed at the end of this instruction sheet.

Note

Since mV input and output units are available, you can

use the calibrator for any thermocouple type by making

manual calculations or referring to tables.

PN 650306 July 1997 Rev. 1, 10/97

All product names are trademarks of their respective companies.

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714 English Instruction Sheet

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Thermocouple Standards and Scales

Thermocouple Type Standard Scale

J, K, T, E, R, S, B NIST 175 ITS-90

L (J-DIN), U (T-DIN) DIN 43710 IPTS-68

Thermocouple Properties

Thermocouple

Type Temperature

Ranges Display Resolution

J -200 to 1200°C,

-328 to 2192°F0.1°C or °F

K -200 to 1370°C

-328 to 2498°F0.1°C or °F

T -200 to 400°C

-328 to 752°F0.1°C or °F

E -200 to 950°C

-328 to 1742°F0.1°C or °F

R -20 to 1750°C

-4 to 3182°F1°C or °F

S -20 to 1750°C

-4 to 3182°F1°C or °F

B 600 to 1800°C

1112 to 3272°F1°C or °F

L -200 to 900°C

-328 to 1652°F0.1°C or °F

U -200 to 600°C

-328 to 1112°F0.1°C or °F

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Millivolt Range and Resolution

Mode Range Display Resolution

mV -10 to 75 mV 0.01 mV

Explanation of International Symbols

The following symbols are used on the calibrator or in this

instruction sheet. The table below explains their meaning.

International Symbols

Symbol Meaning

JEarth ground

IFuse

MBattery

WRefer to this instruction sheet for information about

this feature.

TDouble insulated

Conforms to relevant Canadian Standards

Association directives.

PConforms to European Union directives

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Safety Information

WWarning

To avoid possible electric shock or personal injury:

•Never apply more than 30 V between the TC

terminals, or between either TC terminal and

earth ground.

•Make sure the battery door is closed and

latched before you operate the calibrator.

•Remove an attached thermocouple miniplug

from the calibrator before you open the battery

door.

•Do not operate the calibrator if it is damaged.

•Do not operate the calibrator around explosive

gas, vapor, or dust.

When servicing the calibrator, use only specified replacement

parts.

Turning the Calibrator On

Press the green Opushbutton to turn the calibrator on and off.

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Measuring a Thermocouple

714

THERMOCOUPLE

CALIBRATOR

30V

MAX

Press to toggle

°C or °F

Press so that

INPUT is on

the display

Shows TC type

selected

INPUT

TC wire and

miniplug of same

type as selected

Press to select

TC type or mV

ke01f.eps

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Simulating a Thermocouple

714

THERMOCOUPLE

CALIBRATOR

30V

MAX

Press to toggle

°C or °F

TC wire and

miniplug of same

type as selected

Press so that

OUTPUT is on

the display

Press to scroll

up/down 0.1°

(or 0.01 mV).

Hold down to

scroll faster

Press to step

up/down 50°

(or 10 mV)

Press to select

TC type or mV

Shows TC type

selected

OUTPUT

ke02f.eps

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Maintenance

For maintenance procedures not described in this sheet, contact

a Fluke Service Center.

In Case of Difficulty

•Check the battery and thermocouple test wiring. Replace as

necessary.

•Review this sheet to make sure you are using the calibrator

correctly.

If the calibrator needs repair, contact a Fluke Service Center. If

the calibrator is under warranty, see the warranty statement for

terms. If the warranty has lapsed, the calibrator will be repaired

and returned for a fixed fee. Contact a Fluke Service Center for

information and price.

Cleaning

Periodically wipe the case with a damp cloth and detergent; do

not use abrasives or solvents.

Calibration

Calibrate your calibrator once a year to ensure that it performs

according to its specifications. A calibration manual is available

(PN 686540). Call 1-800-526-4731 from the USA and Canada. In

other countries, contact a Fluke Service Center.

Replacing the Battery

When the Msymbol appears on the display, replace the

battery with a 9 V alkaline battery.

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it07f.eps

Replacing the Fuse

!Warning

To avoid personal injury or damage to the

calibrator, use only a 0.125A 250V fast fuse,

Littelfuse®2AG.

Fuse F1 is probably blown if in the input mode, the calibrator

always reads OL, even with a thermocouple connected.

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Replace the fuse as follows:

1. Remove the test leads and turn the calibrator off.

2. Remove the battery door.

3. Remove the three Phillips-head screws from the case

bottom and turn the case over.

4. Gently lift the top cover from the end nearest the input/output

terminals until it unsnaps from the bottom cover.

5. Replace the fuse with a 0.125 A 250 V fast fuse, Littelfuse®

2AG.

6. Fit the top and bottom covers together, engaging the two

snaps. Make sure that the gasket is properly seated.

Reinstall the three screws.

7. Replace the battery door.

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Snaps

ke03f.eps

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