9.4 Exchanging the transmitter
#
Valve
Significance
1
Close A and B
Close shut-off valves
2
Close 4
Close negativ side
3
Open 3
Connect positive and
negative side
4
Close 2
Shut-off transmitter to
positive side
5
Exchange transmitter
6
Commission new transmitter,
see chapter 4
+
2
A
B
6
7
4
3
BA174Y28
inlet valve
inlet valve
equalising valve
shut-off valve
shut-off valve
vent valves on
transmitter
PMD 25 K
Preferred installation for gases
3-way
manifold
+
2
1
5
A
B
6
7
4
3
+
–
shut-off
valve
shut-off
valve
inlet
valve
inlet
valve
drain
cock
drain
cock
equalising valve
BA174Y70
vent valves on
transmittert
PMD 25 K
Preferred installation for fluids
trap
trap
3-way
manifold
Deltabar S
9 Maintenance and Repair
Hauser
65