TDOCT-
3147_E
NG
259858
08/
2013
Pressure Transmitter LHCR-51, LHCS-51
Commissioning
36
5.5.2
Calibration with reference pressure (wet calibration)
Example:
In this example, a device with a 400 mbar (6 psi) sensor is configured for the
0 mbar 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.
5.6
Function check
Carry out a post-installation and a post-connection check as per the checklist before
commissioning the device.
→
→
Description
1 Perform "position zero adjustment
→
Calibration with reference pressure
1
See Table, Step 4.
2
See Table, Step 5.
2 Select the "Pressure" measuring mode via the
"Measuring mode" parameter.
Menu path: Setup
→
Measuring mode
3 Select a pressure unit via the "Press eng. unit"
parameter, here "mbar" for example.
Menu path: Setup
→
Press. eng. unit
4 The pressure for the lower-range value (4 mA
value) is present at the device, here 0 mbar for
example.
Select the "Get LRV" parameter.
Menu path: Setup
→
Extended setup
→
Current output
→
Get LRV.
Confirm the value present by selecting "Confirm".
The pressure value present is assigned to the
lower current value (4 mA).
5 The pressure for the upper-range value (20 mA
value) is present at the device, here 300 mbar
(4.5 psi) for example.
Select the "Get URV" parameter.
Menu path: Setup
→
Extended setup
→
Current output
→
Get URV.
Confirm the value present by selecting "Confirm".
The pressure value present is assigned to the
upper current value (20 mA).
6 Result:
The measuring range is configured for
0 mbar to +300 mbar (4.5 psi).
20
4
I
[mA]
0
300
p
[mbar]
1
2
DOCT3147_eng.book Seite 36 Freitag, 16. August 2013 4:58 16
