Commissioning with an operating menu (onsite display/FieldCare) Cerabar M, Deltabar M, Deltapilot M
90 Endress+Hauser
8.6 Pressure measurement
8.6.1 Calibration without reference pressure (dry calibration)
Calibration is possible only using FieldCare.
Example:
In this example, a device with a 400 mbar (6 psi) sensor is configured for the 0 to +300 mbar
(4.35 psi) measuring range, i.e. 0 mbar and 300 mbar (4.35 psi) are assigned.
Prerequisite:
This is a theoretical calibration, i.e. the pressure values for the lower and upper range are
known.
Due to the orientation of the device, there may be pressure shifts in the measured value, i.e.
the measured value is not zero in a pressureless condition. For information on how to
perform position adjustment, see ä 73.
8.6.2 Required parameters for Pressure measuring mode
Description
1 Select the "Pressure" measuring mode via the "Measuring mode (005)" parameter.
Menu path: Setup Measuring mode (005)
2 Select a pressure unit via the "Scale in. Press. eng. unit" element, here "mbar" for example.
Menu path: Setup Scale in. Press. eng. unit
3 Enter a pressure value of 0 mbar via the "Scale in. Set LRV" element.
Menu path: Expert Communication Pressure Transducer Block Scale in. Set LRV
4 Enter a pressure value of 300 mbar (4.35 psi) via the "Scale in. Set LRV" element.
Menu path: Expert Communication Pressure Transducer Block Scale in. Set LRV
5Result:
The measuring range is configured for 0 to +300 mbar (4.35 psi).
Parameter name Description
Measuring mode (005) ä 119
Switch P1/P2 (163) ä 121
High-pressure side (006) (Deltabar) ä 121
Press. eng. unit (125) ä 120
Corrected press. (172) ä 122
Pos. zero adjust (007) (Deltabar M and gauge pressure sensor) ä 120
Damping switch (164) ä 120
Damping value (017) ä 120
Pressure af. damp (111) ä 122
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