MultiExact Gas Analyser
9 – Fault finding
Fault symptom
Recommended actions
Analyser measurements are not as
expected.
Check that the correct display units have been
selected, and that the units conversion factor has
been correctly entered (see Section 5.10).
If you are using pressure compensation, check that
the pressure transducer has been correctly
calibrated and is switched on (see Section 6.3).
Ensure there are no leaks in the pipework.
Analyser measurements are
unstable.
Check that the sample gas supply pressure is
correct: see Section 2.4.
Check that the analyser is not being subjected to
high levels of vibration and ensure there are no
leaks.
Check that the sample gas inlet is not blocked, and
that the sample gas supply to the analyser is not
restricted.
Ensure there are no leaks in the pipework.
The analyser will not calibrate.
Check that the correct low and high calibration gases
are being used: see Section 2.5.
Check that the sample gas inlet is not blocked, and
that the sample gas supply to the analyser is not
restricted.
Check that the sample gas outlet is not blocked, and
that any pipes connected to the outlet are not
restricted.
The analyser 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 analyser: see Section 5.2.
The PSU has over voltage and current protection if
activated, the PSU will shut down, turn off power the
power, wait 3 minutes and reapply the power.
If the supply is correctly connected, an operating
fuse may have failed; inspect and replace the fuses if
necessary: refer to Section 8.2.
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