Fluke 712 Instruction Manual
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Fluke 712 Instruction Manual

Rtd calibrator
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®
712
RTD Calibrator
Instruction Sheet
Introduction
Fluke Model 712 RTD Calibrator is a handheld tool for calibrating
RTD (Resistance Temperature Detector) transmitters, including
most pulsed transmitters. It simulates and measures seven
different types of RTDs, in units of °C or °F. It also simulates and
measures resistance in units of ohms. It does not source and
measure simultaneously.
Your calibrator is supplied with a Flex-Stand holster, an
installed 9 V alkaline battery, two sets of test leads, and this
instruction sheet.
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 next table lists the RTD types supported by the calibrator,
with their ranges, resolution, and the allowable excitation current
from an RTD measurement device under test. All RTD types use
ITS-90 curves. Full calibrator specifications are listed at the end
of this instruction sheet.
PN 650280 August 1997, Rev.2, 5/04
1997-2004 Fluke Corporation. All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.

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  • Page 1 RTD Calibrator Instruction Sheet Introduction Fluke Model 712 RTD Calibrator is a handheld tool for calibrating RTD (Resistance Temperature Detector) transmitters, including most pulsed transmitters. It simulates and measures seven different types of RTDs, in units of °C or °F. It also simulates and measures resistance in units of ohms.

  • Page 2: Safety Information

    Safety Information W Warning To avoid possible electric shock or personal injury: • Never apply more than 30 V between any two terminals, or between any terminal and earth ground. • Make sure the battery door is closed and latched before you operate the calibrator. •...

  • Page 3: Getting Acquainted With The Calibrator

    Getting Acquainted with the Calibrator Press the green O pushbutton to turn the calibrator on and off. Press the INPUT/OUTPUT pushbutton to select either INPUT (measuring) or OUTPUT (simulating). kg03f.eps Display Elements Element Meaning A INPUT Lit when measuring an RTD or resistance B OUTPUT Lit when simulating an RTD or resistance When simulating an RTD or ohms, the excitation...
  • Page 4 Display Elements (cont.) Element Meaning When measuring an RTD, one of these is lit to 2W, 3W, 4W indicate a two-wire, three-wire, or four-wire configuration. These annunciators are not used when simulating an RTD or resistance (output). F RTD TYPES The RTD type annunciators (example, Ni 120) show the selected RTD type.
  • Page 5 Simulating an RTD To simulate an RTD, proceed as follows: Press O to turn on the power. If the calibrator is in input mode (INPUT on the display), press INPUT OUTPUT once. Make sure the display shows OUTPUT. Press to select the desired RTD type. Connect test leads to the terminals of the RTD measuring device as shown.
  • Page 6 Measuring an RTD To measure an RTD, proceed as follows: Press O to turn on the power. If the calibrator is in simulate mode (OUTPUT on the display), press INPUT OUTPUT once. Make sure the display shows INPUT. Press to select the desired RTD type. Press to select a two-wire, three-wire, or four- wire RTD input configuration.

  • Page 7: Maintenance

    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;...

  • Page 8: Replacing The Battery

    Replacing the Battery When the B symbol appears on the display, replace the battery with a 9 V alkaline battery. it07f.eps...

  • Page 9: Testing And Replacing The Fuses

    Testing and Replacing the Fuses WWarning To avoid personal injury or damage to the calibrator, use only a 0.125A 250V fast fuse, Littelfuse 2AG. Fuse F1 protects the input circuit. Fuse F2 protects the output circuit. Test and replace the fuses using the following procedure: Remove the test leads from the calibrator terminals and turn the calibrator off.
  • Page 10 Snaps kg08f.eps...

  • Page 11: Replacement Parts And Accessories

    MP89, 90 Non-skid foot 824466 O-ring for input/output receptacle 831933 MP92 Battery door 609930 H5, 6 Battery door fasteners 948609 Keypad 687084 712 Instruction Sheet 650280 Test lead, red 688051 Test lead, black 688066 71X Series Calibration Manual 686540 Option...
  • Page 12 MP85 MP86 H2, 3, 4 MP89, 90 H5, 6 MP92 Instruction Sheet Test Lead Set Holster kg10c.eps...

  • Page 13: Specifications

    Specifications are based on a one year calibration cycle and apply for ambient temperature from +18°C to +28°C unless stated otherwise. Note Specifications on this Instruction Sheet apply to the 712 RTD Calibrators with serial number 7676001 or above. Ohms Specifications Input...
  • Page 14 Addresses pulsed transmitters and PLCs with pulses as short as 5 ms. Allowable Excitation is for Output mode only. It shows the allowable excitation current from an ohmmeter or RTD measurement device connected to the calibrator. Excitation current from 712: 0.2 mA. Maximum input voltage: 30 V...

  • Page 15: General Specifications

    General Specifications Resolution: RTD: 0.1°C, 0.1°F. Ohms: 0.1Ω Maximum voltage applied between any terminal and earth ground or between any two terminals: 30 V Storage temperature: -20°C to 60°C Operating temperature: -10°C to 55°C Operating altitude: 3000 meters maximum Temperature coefficient: 0.005% of ohms range per °C for temperature ranges -10°C to 18°C and 28°C to 55°C.

  • Page 16: How To Contact Fluke

    The Netherlands LIMITED WARRANTY & LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for three years 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.

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