Endress+Hauser Cerabar PMP23, Руководство по эксплуатации

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Commissioning Cerabar PMP23 IO-Link
26 Hauser
9.4 Performing position adjustment
Zero point configuration (ZRO)
Navigation Application → Sensor → Zero point configuration (ZRO)
Description (typically absolute pressure sensor)
A pressure shift resulting from the orientation of the device can be corrected by the
position adjustment.
The pressure difference between zero (set point) and the measured pressure must be
known.
Prerequisite An offset is possible (parallel shifting of the sensor characteristic) to correct the
orientation and any zero point drift. The set value of the parameter is subtracted from the
"raw measured value". The requirement to be able to perform a zero point shift without
changing the span is met with the offset function.
Maximum offset value = ± 20 % of the sensor nominal range.
If an offset value is entered that shifts the span beyond the physical limits of the sensor,
the value is admitted but a warning message is generated and displayed via IO-Link. The
warning message only disappears when the span is within the sensor limits, taking the
offset value currently configured into consideration.
The sensor can
• be operated in a physically unfavorable range, i.e. outside its specifications, or
• be operated by making appropriate corrections to the offset or span.
Raw measured value – (manual offset) = display value (measured value)
Example • Measured value0.002 mbar (0.029 psi)
• Set the measured value in the parameter to 0.002.
• Measured value (after pos. zero adjust) = 0.000 mbar (0 psi)
• The current value is also corrected.
Note Setting in increments of 0.001. As the value is entered numerically, the increment
depends on the measuring range
Options No selection. The user is free to edit the values.
Factory setting 0
Zero point adoption (GTZ)
Navigation Application → Sensor → Zero point adoption (GTZ)
Description (typically gauge pressure sensor)
A pressure shift resulting from the orientation of the device can be corrected by the
position adjustment.
The pressure difference between zero (set point) and the measured pressure need not be
known.