Quick Performance Check; Performance Verification Tests - Keysight Technologies 34420A Service Manual

3 Calibration Procedures

Quick Performance Check

The quick performance check is a combination of internal self-test and an
abbreviated performance test (specified by the letter Q in the performance
verification tests). This test provides a simple method to achieve high confidence
in the meter's ability to functionally operate and meet specifications. These tests
represent the absolute minimum set of performance checks recommended
following any service activity. Auditing the meter's performance for the quick
check points (designated by a Q) verifies performance for "normal" accuracy drift
mechanisms.
This test does not check for abnormal component failures.
NOTE
To perform the quick performance check, do the following:
– Perform a complete self-test. A procedure is given on page 72.
– Perform only the performance verification tests indicated with the letter Q.
If the meter fails the quick performance check, adjustment or repair is required.
If the meter fails the quick performance check, adjustment or repair is
NOTE
required.

Performance Verification Tests

The performance verification tests are recommended as acceptance tests when
you first receive the meter. The acceptance test results should be compared
against the 90 day test limits. You should use the 24-hour test limits only for
verification within 24 hours after performing the adjustment procedure. After
acceptance, you should repeat the performance verification tests at every
calibration interval.
If the meter fails performance verification, adjustment or repair is
NOTE
required
80 Keysight 34420A Service Guide