Endress+Hauser Deltabar M PMD55, Brief Operating Instructions

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Commissioning Deltabar M PMD55 FOUNDATION Fieldbus
24 Hauser
8.2 Configuring pressure measurement
8.2.1 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 (0 to 4.5 psi) measuring range, i.e. are assigned 0 mbar and
300 mbar (4.5 psi) respectively.
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 an unpressurized state. For information on how to
perform position adjustment, see →  21.
Description
1 Select the "Pressure" measuring mode via the "Measuring mode" parameter.
Menu path: Setup → Measuring mode
L
WARNING
Changing the measuring mode affects the span (URV)
This situation can result in product overflow.
‣
If the measuring mode is changed, the setting for the span (URV) must be checked in the "Setup" operating
menu and readjusted if necessary.
2 Via the "Scale in. press. eng. unit" parameter, select a pressure unit, here "mbar" for example.
Menu path: Setup → Scale in. press. eng. unit
3 Via the "Scale in. set LRV" parameter, enter a pressure value of 0 mbar.
Menu path: Expert → Communication → Transducer Block Pressure → "Scale in. set LRV
4 Via the "Scale in. set URV" parameter, enter a pressure value of 300 mbar (4.35 psi).
Menu path: Expert → Communication → Transducer Block Pressure → Scale in. set URV
5 Result:
The measuring range is configured for 0 to +300 mbar (0 to 4.5 psi).