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7. Maintenance
7.1 Sentro eModule and rModules
Sentro eModules and rModules are
conveniently replaced, as they have a pre-
calibrated standardised output signal. They
can be replaced in seconds - eliminating the
need for precision calibration facilities.
7.2 Checking the Response of Gas
Sensing eModules
The response of the Sentro 8 Sensorstation
should be checked at regular intervals to
ensure continued accuracy.
Gas sensors have a known ZERO and SPAN
movement related to time, level of exposure
to gas, and the nature of the environment,
Trolex recommends that the sensors should
be bump tested with a suitable test gas at
regular intervals. This should be carried out
in accordance with best practice for the
industry where the gas sensor is being used.
Periodic calibration of the gas sensor should
be carried out whilst it is in service. For
oxygen and carbon monoxide gas sensors
Trolex recommends that this is carried
out every 3 weeks. For other gas sensors
Trolex recommends that this is carried out
in accordance with best practice for the
industry where the gas sensor is being used,
and should take into consideration local
operating conditions.
Section 4.4.1
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