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Calibration Procedures
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Keysight U1281A/U1282A Service Guide
Calibration Overview
This manual contains procedures to verify the U1281A/U1282A handheld digital
multimeter performance and to perform adjustments (calibration). The
performance test procedures allow you to verify that the multimeter is operating
within its published specifications. The adjustment procedures ensure that the
multimeter remains within its specifications until the next calibration.
Closed-case calibration
The multimeter features closed-case electronic calibration. In other words, no
internal mechanical adjustments are required. The multimeter calculates
correction factors based upon the input reference value you set. The new
correction factors are stored in the nonvolatile memory until the next calibration
adjustment is performed. The nonvolatile EEPROM calibration memory is retained
even when the power is switched off.
Keysight calibration services
When your multimeter is due for calibration, contact your local Keysight Service
Center to enquire about recalibration services.
Calibration interval
A 1-year interval is adequate for most applications. Accuracy specifications are
warranted only if adjustment is made at regular calibration intervals. A 1-year
calibration cycle is suggested for operation at room temperature. The calibration
cycle is 1.5 times of accuracy for 2 years except for capacitance, frequency, duty
cycle and pulse width measurements, and square-wave output. Keysight does not
recommend extending calibration intervals beyond 2 years for any application.
NOTE
Ensure that you have read the
calibrating the multimeter.