Calibration; Equipment Required For Calibration; Calibration Status Indicator; How To Enter Calibration - Fluke 753 Calibration Manual

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Calibration Manual
Fluke 75X

Calibration

Calibration is necessary only if the UUT does not pass verification. Always re-verify
after calibration.
Calibration for the Product is done with internal software. There are no physical
adjustments (except for three potentiometers used for common-mode error, explained
later in this chapter). The subsequent instructions for calibration are minimal because of
the built-in guided procedures. The internal software routines give step-by-step prompts
for the correct stimulus or measurement. The guided procedures also illustrate which
terminals (jacks) to use when you apply a stimulus, reading a measurement, or which
terminals must be to be shorted with jumpers. Follow the instructions carefully to
complete each calibration routine.

Equipment Required for Calibration

The necessary accuracy of the source or measurement does not always correspond to the
number of decimal places indicated on the UUT's display. For example, if you calibrate
Frequency Measure, when the display requests a source value of 5.00000 V at
1.00000 kHz, the necessary accuracies are not of that magnitude. Use the measurement
and source equipment suggested at the start of the Performance Verification Test.

Calibration Status Indicator

The calibration display is accessed by when you push s and then the Prev. Page
softkey. At the top of the display is the Calibration Status followed by a number. This
number moves forward after each subroutine is completed and the new constants are
kept. When you do a complete calibration, the Product moves the Calibration Status by 4.
Because the Calibration Status number is changed only by a re-calibration, it can be used
to make sure that previous calibration constants have not been changed.

How to Enter Calibration

In the calibration setup screen, push W to calibrate. The calibration screen requests
a password, 1234 is the default. After you put in the password, push Z to continue.
The password is user-settable.
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10. Disconnect all test equipment.
Figure 15. HART Mode Verification Connections
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