Technical data

Calibration Procedures 3
34980A Service Guide 51
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 50.
• 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.