Chapter 6 _______________________________________________________________ Maintenance
VAISALA _______________________________________________________________________ 137
Calibration Procedure Failed
Table 25 below shows an example of a Guided Calibration Procedure
where the Scatter Signal Test (and therefore the Guided Calibration
Procedure) fails due to a too large deviation between calibration values
stored in the measurement unit and the result of the current Calibration
Procedure.
Table 25 Guided Calibration Procedure, Scatter Signal Test
Failed
Step 1/3
Clean Windows and type YES: YES
Install Zero Plugs and type YES:
YES
1st run
.......|||||||||||
Zero signal test PASSED. (0.0000)
Zero Signal Test is passed
successfully.
Remove zero plugs, install glass
plates and
enter signal value (between 0 and
10): .8856
Is signal value 0.885600 correct?
Type YES or NO? YES
1st run
...|||||||||||||||
Signal test FAILED. (1.3497)
Signal change too large. Verify
that glass plates are in place.
Repeat the test? Type YES: YES
2nd run
................||
Signal test FAILED. (1.3497)
Signal change too large. Verify
that glass plates are in place.
Repeat the test? Type YES: YES
3rd run
..................
The Scatter Signal Test is
failed three times in a row.
All measured deviations are
off the limit of recalibration.
The most common
handling failure (wrong glass
plate assembly installation) is
mentioned as a hint to
successfully complete the
test.
The user has to confirm
the restart of the test.
Note that an unremoved
zero plug can also create this
failure.
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