Fluke 714 Manuale utente
714 English Instruction Sheet
Page
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®
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-Standholster, 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
1997 Fluke Corporation. All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.
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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
TC
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
TC
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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F1
Snaps
ke03f.eps
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