Unipulse F156 Operation Manual page 57

4.CALIBRATION
When a calibration error is displayed, take measures according to the error message, and do zero
calibration again.
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Console
...The zero point must be re-calibrated.
...The entered balance weight value is greater than the maximum
capacity.
Re-enter a balance weight value lower than the maximum
capacity.
...The entered balance weight value is 00000. Re-enter the correct
value.
...The output of the load cell is short of the span adjustment range.
Check to see if the load cell is correctly loaded, and the output
of the load cell has sufficient performance to reach the span
adjustment range.
...The output of the load cell is minus. Check to see if the load cell
is loaded in the correct direction, and the wiring between +SIG
and –SIG of the load cell is not reversed.
...The output of the load cell is over the span adjustment range.
Check to see if the load cell is correctly loaded, and the output
of the load cell is within the span adjustment range of the F156.
...The weight value is not stable.
Adjust the parameters for motion detection, check that the
STAB status is "ON," and then do zero calibration again.