Endress+Hauser Deltapilot M FMB50 - Linearization; Pressure Measurement

Commissioning Deltapilot M 4...20 mA HART
52 Endress+Hauser
It is also possible to use different liquids (e.g. water) for the adjustment. In this case you have to
enter the different densities at following menu path:
•Setup  Ext. Setup  Level  Adjust density (034) (e.g. 1.0 kg/l for water)
•Setup  Ext. Setup  Level  Process density (035) (e.g. 0.8 kg/l for oil)
8.6 Linearization
See operating instructions.
8.7 Pressure measurement
8.7.1 Calibration without reference pressure (dry calibration)
Example:
In this example, a device with a 400 mbar (6 psi) sensor is configured for the 0 to +300 mbar
(4.5 psi) measuring range, i.e. 0 mbar is assigned to the 4 mA value and 300 mbar (4.5 psi) to
the 20 mA value.
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 37.