Endress+Hauser Deltapilot M FMB52 - Page 53

Deltapilot M 4...20 mA HART Commissioning
Endress+Hauser 53
8.7.2 Calibration with reference pressure (wet 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:
The pressure values 0 mbar and 300 mbar (4.5 psi) can be specified. The device is already
mounted, for example.
For a description of the parameters mentioned, see operating instructions "Description of
parameters".
Description
1 Select the "Pressure" measuring mode via the
"Measuring mode" parameter.
Menu path: Setup Measuring mode
A0031032
Fig. 19: Calibration without reference pressure
A See Table, Step 3.
B See Table, Step 4.
2 Select a pressure unit via the "Press eng. unit"
parameter, here "mbar" for example.
Menu path: Setup Press. eng. unit
3 Select the "Set LRV" parameter.
Menu path: Setup Set LRV
Enter the value for the "Set LRV" parameter (here 0
mbar) and confirm. This pressure value is assigned
to the lower current value (4 mA).
4 Select the "Set URV" parameter.
Menu path: Setup Set URV
Enter the value for the "Set URV" parameter (here
300 mbar (4.5 psi)) and confirm. This pressure
value is assigned to the upper current value
(20 mA).
5Result:
The measuring range is configured for 0 to +300
mbar (4.5 psi).
p
[mbar]
20B
4
A
0
300
I
[mA]