54733-10BA2L
3 – 402 02.2017
5 Calibration Volume 3
5.3 Ensuring the Function of the Measure-
ment
Please proceed as follows to ensure that the measurement is work-
ing correctly after calibration or parameter change:
•Check the live display
• Compare the measured values with the control system
• Simulate measured values with test generator
• Perform test run with product
• Archive the calibration data
5.3.1 Simulating Measured Values with a Test
Generator
The measuring system has an internal test generator to generate
counts that can be used to check the calibration and thus the mea-
sured value display accurately.
For this purpose the counting rates of the calibration values may be
used.
Select Device Config Setup Service Test Test
Settings.
Set Cps Average Mode to FIXED VALUE.
Enter the calibration count rate for Cps Average Test.
Read off the expected measured value atLevel or Density.
In addition to the calibration count rates, you may also enter inter-
mediate values, if necessary, to check the measured value display.
At the same time, you can also compare the measured value display
in the control system for every single count rate with the measured
value displayed in the LB 480 to ensure the correct transfer of the
measurement signal.
After this simulation has been completed, you have to switch the
parameter Cps Average Mode back to NORMAL. If you forget
this, the measurement remains frozen. As a reminder, the Commu-
nicator cyclically outputs error message 106 and the Operating
Status of the measurement shows TEST (instead of RUN).
5.3.2 Checking the Live Display
Check the live display to make sure no error is displayed and the
measurement is in the normal measurement mode. You can also
see whether the measured values are plausible and are output cor-
rectly.
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