Technical data

Performance Test Calibration 2
U2741A USB Modular 5.5 Digits Digital Multimeter Service Guide 11
Self-Calibration
The self- calibration performs an internal self- alignment
routine to optimize the signal path that affects measurement
sensitivity, offset and trigger parameters. It is advisable for
you to run self- calibration for the following situation:
• Every 12 months or after 2000 hours of operation.
• If the ambient temperature is higher than 10 °C from the
calibration temperature.
• To maximize the measurement accuracy.
• When you experience abnormal operation.
• To verify proper operation after repair.
To start self- calibration, perform the following:
1 Click Tools > Self-Calibration.
2 Click Ok when the message is shown.
3 Wait for a few minutes for the self- calibration process to
be completed.
4 Click Close when the self- calibration is completed.
NOTE
Disconnect all probe and meter connections to the input terminal of the
instrument.