Endress+Hauser Cerabar M - Page 94

Commissioning with an operating menu (onsite display/FieldCare) Cerabar M, Deltabar M, Deltapilot M
94 Endress+Hauser
8.8.2 Preparatory steps
Before calibrating the Deltabar M, the impulse piping must be cleaned and filled with
medium. See the following table.
Valves Meaning Preferred installation
1Close 3.
A0030036
Above: preferred installation for gases
Below: preferred installation for liquids
I Deltabar M
II Three-valve manifold
III Separator
1, 5 Drain valves
2, 4 Inlet valves
3 Equalizing valve
6, 7 Vent valves on Deltabar M
A, B Shut-off valves
2 Fill measuring system with medium.
Open A, B, 2, 4. Medium flows in.
3 Clean impulse piping if necessary
1)
:
– by blowing out with compressed air in the case of
gases
– by rinsing out in the case of liquids.
1) for arrangement with 5 valves
Close 2 and 4. Block off device.
Open 1 and 5.

Blow out/rinse out impulse
piping.
Close 1 and 5.

Close valves after cleaning.
4Vent device.
Open 2 and 4. Introduce medium.
Close 4. Close low-pressure side.
Open 3. Balance positive and low-
pressure side.
Open 6 and 7 briefly, then
close them again.
Fill device completely with
medium and remove air.
5 Carry out position zero adjustment ( ä 73) if the
following conditions are met. If the conditions are not
met, then do not carry out the pos. zero adjustment until
after step 6.
Conditions:
– The process cannot be blocked off.
– The tapping points (A and B) are at the same geodetic
height.
6 Set measuring point in operation.
Close 3. Shut off high-pressure side
from low-pressure side.
Open 4. Connect low-pressure side.
Now
–1

, 3, 5

, 6 and 7 are closed.
– 2 and 4 are open.
– A and B open (if present).
7 Carry out position zero adjustment ( ä 73) if the flow
can be blocked off. In this case, step 5 is not applicable.
8 Carry out calibration. See page 95,  Chap. 8.8.3.
+–
A B
–
P2
+
P1
6
7
3
24
+–
A B
II
III
III
–
P2
+
P1
6
7
3
24
I
II
I
15