Cerabar PMP23 IO-Link
Description of device parameters
Hauser
45
14.3 Parameter
14.3.1 Application
Sensor
Unit changeover (UNI)
Navigation
Application → Sensor → Unit changeover (UNI)
Description
Select the pressure unit. If a new pressure engineering unit is selected, all pressure-specific
parameters are converted.
Switch on value
Depends on order specifications.
Options
• bar
• kPa
• Mpa
• psi
Factory setting
Depends on order specifications.
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.
