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 complete self-test. A procedure is given on page 73.
• 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 listed in Chapter 1, as the verification limits.
Chapter 4 Calibration Procedures
Performance Verification Tests
74
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