Commissioning
Deltabar S FMD77, FMD78, PMD75 with FOUNDATION Fieldbus
70
Hauser
7.7
Level measurement
7.7.1
Preparatory steps
Open container
• The Deltabar S PMD75, and FMD77 are usually suitable for level measurement in an open
container.
• FMD77: the device is ready for calibration immediately after opening a shutoff valve (may
or may not be present).
• PMD75: before calibrating the device, the pressure piping must be cleaned and filled with
fluid.
See the following table.
Valves
Meaning
Installation
1
Fill container to a level above the lower tap.
P01-xMD7xxxx-11-xx-xx-xx-003
Fig. 38: Open
container
I
Deltabar S PMD75
II
Separator
6
Vent valves on Deltabar S
A
Shutoff valve
B
Drain valve
2
Fill measuring system with fluid.
Open A.
Open shutoff valve.
3
Vent device.
Open 6 briefly, then close it
again.
Fill device completely with
fluid and remove air.
4
Set measuring point to operation.
Now
– B and 6 are closed.
– Axis open.
5
Carry out calibration.
+
A
B
6
II
I
+
–
p
atm
Содержание Deltabar S FMD77
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