Aql (Acceptable Quality Level); Run Audit Test Every [X] Parts Tested - Voltech AT5600 User Manual

C H A P T E R 1 4 - A T
A Q L ( A c c e p t a b l e Q u a l i t y L e v e l )
Settings for production test are defined here. AQL is the level of test failures in a
batch that are acceptable. Exceeding the AQL is an indication that there is a
problem with the quality of the production process or the quality of materials that
are being used. AQL monitoring is an optional feature of the Voltech PC Server,
which displays live summary results from multiple AT testers. When the AQL set
here is reached or exceeded, the Server will display a warning. Both types of AQL
limits may be used at the same time. Reaching any one limit will cause a warning
to be displayed on the Server.
For further details, see the AT Server section of this manual.
AQL No. of Parts - This is the number of failures in the batch at which a
warning will be displayed on the Server. This is most often used when the batch
size is always similar, or zero / very small numbers of defects are expected.
AQL % of Parts - This is the percentage level of failures at which a
warning will be displayed on the Server. Note that this AQL is only applied after
sufficient parts have been tested to make the percentage meaningful. When
setting AQL % of Parts to be 1%, for example, a warning will only be displayed
after 100/1 = 100 parts have been tested.
R u n a u d i t t e s t e v e r y [ X ] p a r t s t e s t e d .
Defines the frequency that Audit Tests are to be performed.
NOTE: AUDIT and DIAGNOSTIC results.
Audit AND Diagnostic tests, on a "not run" cycle, will return a PASS and a
numeric value of -1E-15.
This is so they can be easily identified as not having been executed, and can be
easily identified and removed from results for analysis.
AT5600 User Manual 98-119 issue 14
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