Performance Tests and Calibration 5
Keysight U1241B and U1242B User’s and Service Guide 73
Adjustment Considerations
1 Allow the multimeter to warm up and stabilize for five minutes before
performing the adjustments.
2 Assure that the low battery indicator does not appear during the adjustment.
Replace the batteries to avoid inaccurate readings.
3 Consider the thermal effects of the test leads connected to the calibrator and
multimeter. It is recommended to wait for one minute before start performing
the calibration.
4 During ambient temperature adjustment, ensure that the multimeter has been
turned on for at least one hour with K-type thermocouple connected between
the multimeter and calibration source.
After each adjustment, the secondary display shows PAS. If the calibration fails,
the multimeter beeps, and an error number is shown in the secondary display.
Calibration error messages are described in Calibration Errors.
Do not turn off the multimeter during adjustments., as this may delete the
calibration memory for the present function.
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