12-10
ALARMSUSER HANDBOOK
The faulty sensor will cause
the instrument to display a
flashing spanner symbol to
warn the user that this sensor
is not working correctly, as
shown in Fig. 12.8:
12.6.3 Sensor Fault
There are two types of sensor fault as illustrated in the following
displays:
1) If a “ZERO FAULT”
flag and a flashing
spanner symbol
appear, alternating
with a zero reading
as shown in Fig. 12.9,
apply relevant test
gas (LEL in example)
for two minutes and
allow the display to
return to zero, then
switch instrument Off
and On again.
If fault remains,
return instrument to
an approved Service
/ Repair facility.
alternating with
Fig. 12.8 Zero Fault
alternating with
Fig. 12.9 Sensor Fault
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