AZI Sales/Customer Service 800-528-7411 or 602-470-1414 or support@azic.com Page 93 of 105
10. 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.
10.1. The Weight Test
The weight test simulates moisture loss with the removal of one of two known weights,
using the (Factory) WEIGHT Test Program.
This test may be used:
• At the interval established by your quality assurance/control program.
• Any time the instrument is moved, the power switched off, the instrument is jarred or
bumped.
• If there is any concern about the accuracy of the instrument.
• To become familiar with the instrument.
See section 7.1 Performing a Test on page 36 to perform the weight test. Both a 3g and
a 5g weight are required. Test Results should fall between 37.480% and 37.520%. The
final test result screen indicates Pass or Fail by a Green or Red background respectively
and a PASS or FAIL after the result. The TEST RESULTS list also indicates Pass or Fail
by using Green or Red text respectively for the result. For greatest precision, ensure that
the chamber temperature has reached 80 °C before performing weight tests. If the
WEIGHT test fails, repeat the balance calibration and weight test. If the WEIGHT test still
fails, call AZI Customer Service for assistance.
If desired, perform the weight test multiple times to determine the instrument’s
repeatability; this is a more critical verification of the instrument’s performance. For
greatest precision, ensure that the chamber temperature has reached 80 °C before
performing weight tests. Perform five tests and then compute the mean, standard
deviation, and relative standard deviation. (For data analysis instructions, see section 8.2
Test Results on page 55).
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