3. Operation
13
Detecting Gas Saving Lives
English
3.2 Routine maintenance
Site practices will dictate the frequency with which detectors are tested.
Crowcon
recommends that
IRmax
is gas tested at least every 6 months and re-calibrated as
necessary. To re-calibrate an
IRmax
follow the steps given in Section 3.1.
In the event of an electronic failure please consult your local
Crowcon
representative.
Calibration interval:
Crowcon
recommend calibration every 12 months.
Remote calibration via pipe: Wind speed should be less than 2.0 metres per second. If
greater, use the calibration cap to prevent gas dilution.
Cleaning of optics:
Is
not
recommended unless the
IRmax
is in obscuration
fault. If the window or mirror become contaminated, clean
carefully with the IPA impregnated wipes and/or the soft
cloth supplied in the mirror cleaning kit (see Section 5,
Mirrors:
If the mirror is damaged, obtain a mirror replacement
kit (see Section 5,
Accessories and spare parts
on
page 16). The
IRmax
must always be re-zeroed and
re-calibrated after mirror replacement.
If condensation starts to cause faults replace mirror
(optical coating may be damaged).
Crowcon
recommends
replacing mirror every 5 years.
3.3 Changing gas types
Each
IRmax
is supplied pre-calibrated for a particular type of gas (for example methane
or propane). If re-calibration for a different gas type is required, the
IRmax
can be
re-configured using the PC communications kit (see Section 5,
Accessories and spare
parts
on page 16), and then calibrated.