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4
Maintenance
Fused mode analog outputs
4 Maintenance
4.1 Fused mode analog outputs
4.2 Zero reset
Perform the zero reset without tubes.
Blue
10...20 s
18 | 20
QBM37.. Are supplied with a fused mode. This prevents damage caused by an
interruption in Modbus communications.
The analog outputs are switched to DC 0 V for interruptions to communications
>60 seconds.
NOTICE
Use cases for the zero reset
●
As the allowed mounting position is vertical only (see "Mounting [➙ 4]"), the
sensor does not have to be recalibrated during commissioning in the case of
normal pressure measurement.
●
Only in case of relative pressure measurement (pressure nipple "-" connected
to ambient atmosphere) a zero point calibration is recommended during
commissioning.
Afterwards reconnect the tubes
A6V11841988_en--_b
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