WIKA DPT-20, Руководство по эксплуатации

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8 Diagnosis, asset management and service
WIKA Operating Instructions - Differential pressure transmitter DPT-20
5. Finally tighten with 16 Nm at 160 bar, 18 Nm at 400 bar, 22 Nm
for copper gaskets.
The process flanges are exchanged.
Note:
After installing the device in the measuring point, carry out a position
correction again.
8.6 Exchange process module on version IP68
(25 bar)
On version IP68 (25 bar), the user can exchange the process module
on site. Connection cable and external housing can be kept.
Required tools:
•
Hexagon key wrench, size 2
Caution:
The exchange may only be carried out in the complete absence of
line voltage.
In Ex applications, only a replacement part with appropriate Ex ap -
proval may be used.
Caution:
During exchange, protect the inner side of the parts against contami -
nation and moisture.
Proceed as follows when carrying out the exchange:
1. Losen the fixing screw with the hexagon key wrench
2. Carefully detach the cable assembly from the process module
1
2
3
6 4
5
Fig. 45: DPT-20 in IP68 version, 25 bar and lateral cable outlet, external housing
1 Process module
2 Plug connector
3 Fixing screw
4 Cable assembly
5 Connection cable
6 External housing