Endress+Hauser Deltabar M PMD55 - Connecting the device

Deltabar M 4...20 mA HART Commissioning
Endress+Hauser 31
5.6.5 Level selection "in height"
Calibration without reference pressure (dry calibration)
Example:
In this example, the volume in a tank should be measured in liters. The maximum volume of
1000 liters (264 US gal) corresponds to a level of 4 m. The minimum volume of 0 liters
corresponds to a height of 0 m. The density of the medium is 1 g/cm
3
(1 SGU).
Prerequisite:
• The measured variable is in direct proportion to the pressure.
• This is a theoretical calibration i.e. the pressure and volume values for the lower and upper
calibration point must be known.
!
Note!
The values entered for "Empty calib./Full calib." and " Set LRV/Set URV" must be at least 1%
apart. The value will be rejected, and a message output, if the values are too close together.
Other limit values are not checked, i.e. the values entered must be appropriate for the sensor
and the measuring task for the device to be able to measure correctly.
Description
7 Enter the volume value for the lower calibration point
via the "Empty calib." parameter, here "0 liter" for
example.
Menu path: Setup → Extended setup → Level →
Empty calib.
P01-FMX21xxx-05-xx-xx-xx-026
Calibration without reference pressure (dry calibration)
1 See Table, Step 7.
2 See Table, Step 8.
3 See Table, Step 9.
4 See Table, Step 10.
8 Enter the pressure value for the lower calibration point
via the "Empty pressure" parameter, here "0 mbar" for
example.
Menu path: Setup → Extended setup → Level →
Empty pressure
9 Enter the volume value for the upper calibration point
via the "Full calib." parameter, here "1000 liter" (264
US gal) for example.
Menu path: Setup → Extended setup → Level →
Full calib.
10 Enter the pressure value for the upper calibration point
via the "Full pressure" parameter, here "400 mbar" (6
psi) for example.
Menu path: Setup → Extended setup → Level →
Full pressure
11 Result:
The measuring range is set for 0 to 1000 l (264 US gal).
0 l corresponds to an output current of 4 mA.
1000 l (264 US gal) corresponds to an output current of
20 mA.
1000
0
V
[l]
0 400
p
[mbar]
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