KROHNE UFM 600T EN - Manual (Page 29)

C.1.4 Zero set / Zero point calibration
Zero Set
After leaving the transducer distance function the ZERO SET
function can be activated.
The flowmeter is functioning now without displaying any flow
readings. Only the low signal marker (see C.3.1) gives an
indication of the signal quality based on the factory set
default zero point calibration.
The low signal marker will indicate if a zero point calibration is
feasible.
A zero point calibration is strongly advised as this will
improve the overall accuracy.
If no zero point calibration is to be executed, this function
can be skipped.
See also section C.3, Error Detection, for the accuracy to be
expected.
28
ALTOSONIC
Operation
UFM 600 T