6.2.2 Error on interface cable
No reaction of instrument
Broken wires on interface cable or on plug
6.2.3 Error on Gas Monitor - interface module (MG-IF)
No reaction of instrument on request for channel change
If the instrument does not change measuring channels, although
the control signals MRQ(1..3) and CRON have correctly been
issued at the plant control side, at first the interface cable has to
be inspected for defects (broken wires or bad contacts). If no
defect can be located there, the interface module has to be re-
placed (manufacturer).
No reaction of instrument even if results remain below limit
In case the instrument does not evaluate results respectively
does not acknowledge signal, although at plant control side the
control signals MRQ(1..3) and CRON are found to be OK,
check first if the red- or the green light of the channel concerned
is activated on the instrument front panel or not. If no such light
is on, measuring time should be extended. If situation is not
improved thereby, verify if result signal contacts are properly
connected at plant side. In the affirmative, the interface cable
should be inspected for possible wire damage. In case no defect
is found on cable either, the interface module has to be replaced
(manufacturer).
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