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8 Diagnosis, asset management and service
WIKA Operating Instructions - Process pressure transmitter CPT-2x
The first measures are:
•
Evaluation of fault messages
•
Checking the output signal
•
Treatment of measurement errors
Further comprehensive diagnostics options are available with a PC/
notebook with PACTware and the suitable DTM. In many cases, the
reasons can be determined in this way and faults rectified.
Depending on the reason for the fault and the measures taken, the
steps described in chapter "
Setup
" must be carried out again or must
be checked for plausibility and completeness.
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
Fault rectification
Reaction after fault recti-
fication
