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7 Maintenance and fault rectification
OPTISWITCH 3100 C • Relay (DPDT)
29953-EN-210702
Error
Cause
Rectification
Signal lamp flashes red
Error on the vibrating el-
ement
Check if the vibrating element is damaged or extreme-
ly corroded.
Interference on the elec-
tronics module
Exchanging the electronics module
instrument defective
Exchange the instrument or send it in for repair
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.
7.3 Exchanging the electronics module
In general, all electronics modules of series WE60 can be inter-
changed. If you want to use an electronics module with a differ-
ent signal output, you can download the corresponding operating
instructions manual from our homepage under Downloads.
With Ex-d instruments, the housing cover may only be opened if there
is no explosive atmosphere present.
Proceed as follows:
1. Switch off voltage supply
2. Unscrew the housing lid
3. Lift the opening levers of the terminals with a screwdriver
4. Pull the connection cables out of the terminals
5. Loosen the two screws with a screw driver (Torx size T10 or slot
4)
2
1
Fig. 12: Loosen the holding screws
1 Electronics module
2 Screws (2 pcs.)
6. Pull out the old electronics module
7. Compare the new electronics module with the old one. The type
label of the electronics module must correspond to that of the old
electronics module. This applies particularly to instruments used
in hazardous areas.
Reaction after fault recti-
fication
