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115
Reference Manual
00809-0100-4530, Rev DD
May 2016
A minor adjustment using Calibration Distance is normal. There may, for example
be a deviation between the actual tank height and the configured value.
Non-metallic (e.g. plastic) vessels and installation geometry may introduce an
offset for the zero reference point. This offset may be up to ± 1 in. (25 mm). The
offset can be compensated for by using Calibration Distance.
Note
Before running Verify Level, make sure that; the product surface is calm, the tank is not
being filled or emptied, and the actual level is well above the probe end.
Figure 5-13. Calibration Distance
Reported
level
Actual
level
Positive Calibration
Distance value
Negative Calibration
Distance value
Note
The offset (Calibration Distance parameter) is automatically set after completing the
Verify Level method. An offset greater than 4 in. (100 mm) indicates a problem with the
level measurement. Re-check configuration parameters. If these are correct, then view
an echo plot and evaluate thresholds.
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