40 U1241B/U1242B User’s and Service Guide
5 Performance Tests and Calibration
Input-A Terminal Test
This test determines if the input warning of the A current terminal test is
functioning properly. The multimeter sounds an alerting beep when the
test lead is inserted to the A input terminal but the rotary switch is not
set to the corresponding A location. The display indicates a flashing AErr
annunciator until the test lead is removed from the A input terminal. This
warning alert is not available in T1/T2 temperature measurements mode.
Input-mA Terminal Alert Test
This test determines if the detected input voltage level is within the
accepted boundaries when the
μ
A/mA
input terminal is connected. The
multimeter sounds an alerting beep when the
μ
A/mA
input terminal
detects a voltage level of higher than 1.6 V. The display indicates a flashing
CErr
annunciator until the test lead is removed from the
μ
A/mA
input
terminal.
Calibration Process
1 Prior to performing the verification tests, see Test Considerations.
2 Perform the verification tests to characterize the multimeter, see
Performance Verification Tests.
3 Unsecure the multimeter for calibration, see Calibration Security.
4 Prior to performing the adjustments, see Adjustment Considerations.
5 Perform the adjustment procedures, see Calibration Adjustments.
6 Secure the multimeter against unauthorized calibration, see Exiting
Adjustment Mode. Ensure that the multimeter has quit the Adjustment
Mode and turned off.
7 Record the new security code and calibration count in the multimeter’s
maintenance records.
The alerting beep will not be impacted even if the beep function is disabled.
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