Calibration Procedures 3
34980A Service Guide 53
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 instrument’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 instrument’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.
To perform the quick performance check, do the following:
• Perform a self-test as described on page 52.
• Perform only the performance verification tests indicated with the
letter Q.
If the instrument fails the quick performance check, adjustment or repair is required.
Performance Verification Tests
The performance verification tests are recommended as acceptance tests when you first
receive the instrument. 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 instrument fails performance verification, adjustment or repair is required.
Adjustment is recommended at every calibration interval. If adjustment is not made, you
must guard band, using no more than 80% of the specifications, as the verification limits.
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