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AZI Customer Service 800-528-7411 or 602-470-1414 Page 70 of 92
8. PERFORMANCE VERIFICATION
Periodic checks of the system are recommended to verify proper system operation.
These periodic checks will satisfy some quality assurance requirements as specified in
your quality assurance/control policy. A log is recommended, either hand written or
computer managed, which will record the weight test results, sodium tartrate test results,
and retained samples’ results. Shifts in results that are out of range can be quickly
detected and the appropriate corrections made.
For maximum accuracy, let the system warm up until the balance is temperature stable
before performing any testing (See section “6.1 Balance Temperature Stability” on page
64).
8.1. The Weight Test
The weight test, as described in the section beginning on page 22, simulates moisture
loss with the removal of one of two known weights. This test may be used as part of your
control verification program:
At the interval established by your quality assurance/control program;
Any time the unit is moved, the power switched off, the instrument is jarred or
bumped; and/or
If there is any concern about the accuracy of the instrument.