9 – Fault finding
OxyDetect Oxygen Deficiency Gas Detector
60
05311001B / Revision 4
Fault symptom
Recommended actions
The software health indicator is not
moving on the display.
Carry out the recommended actions for the "The
fault LED is on" symptom above.
" - - - - - " is displayed instead of a
sample measurement.
This indicates a possible measurement error, or a
communications error between the transducer and
the instrument controller.
Check that the instrument is not being knocked,
moved, or subjected to high levels of vibration
during sample measurements.
If the instrument is not being knocked, moved or
subjected to vibration and the fault persists,
contact Servomex or your local Servomex agent
for assistance.
Note this fault symptom may be displayed for 2-3
seconds at start-up. This is whilst communications
to the transducer is first established.
Instrument measurement response
is slow.
Check that the sample gas inlet is not blocked.
Instrument measurements are
unstable.
Check that the instrument is not being subjected to
high levels of vibration and ensure there are no
leaks.
The instrument will not calibrate.
Check that the correct low and high calibration
gases are being used
The instrument will not switch on.
Check that the external supply is switched on, and
that no fuse or over-current device in the external
supply has operated to switch off the supply.
If the external electrical supply is correct, switch off
and isolate the supply and check that the supply is
correctly
connected
to
the
instrument:
see Section 6.2.
If the supply is correctly connected, an operating
fuse may have failed; inspect and replace the
fuses if necessary.
The instrument display is blank or is
too dark.
Check that the ambient temperature is within the
valid instrument operating temperature range:
refer to Section 3.2.
Check that the display contrast adjustment has
been correctly set (refer to Section 6.3.4), and has
not been altered.
