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Chapter 4 Calibration Procedures
Performance Verification Tests
4
4
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:
1 Perform a complete self-test. A procedure is given on page 56.
2 Perform only the performance verification tests indicated with the
letter Q.
3 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 specifications given in chapter 1.
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 listed in chapter 1, as the verification limits.
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