KROHNE UFM 600T EN - Manual (Page 30)

Zero Point Calibration
Before performing the zero point calibration ensure that:
- The unit is functioning properly (see low signal marker).
- There is no flow at the location where the transducers are
installed and the pipe section is completely filled with liquid.
Now activate the Start Up Menu and enter the ZERO SET
function:
- With DEFAULT or MEASURED will be visible
- Use to select between DEFAULT or MEASURED
- If DEFAULT is selected press to set the preprogrammed
DEFAULT zero point
- If MEASURED is selected press
-
Now CALIB. NO will be visible.
- Use to select YES and press
- The microprocessor now performs an input signal test.
- On the top line the zero point correction in % is displayed.
- If the correction is near 0% the calibration was successful;
select STORE YES and press to save the zero point cali-
bration.
If no reliable signal is detected the error message BAD ZERO
is displayed and the calibration should be abandoned; in
order to restart the zero point calibration procedure. The data
collection can be started now or other parameters can be
entered through the programming mode (chapter D).
NOTE: MEASURED zero point is selected if there is no flow.
DEFAULT zero point should be selected if the flow cannot
been stopped.
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