Oldham OLCT 20, User Manual

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5
– Maintenance
10
Mounting the detector
The detector must be installed with the detection sensor pointing downwards.
For combustible gas detectors, tilting the device more than 45° past vertical can
lead to imprecise readings.
Despite its high degree of protection (IP66), it may be necessary to protect the
detector against adverse weather conditions (rain, dust, direct sunlight, etc.) and
from direct spraying with cleaning or maintenance products (causing soiling of
the detection sensor).
The detector must also be positioned so as to allow access to the measuring
sensor so that it can be replaced easily.
Factors to be considered in determining optimal detector positioning:

potential sources of gas and vapour emissions

chemical and physical data on gases and vapours which may be present

liquids with low volatility (place the detectors as near as possible to the leak)

type and concentration of gas leaks (high-pressure jet, slow leak, etc.)

air movements:
- indoors: natural and mechanical ventilation
- outdoors: wind speed and direction

effect of temperature

installation so as to avoid mechanical damage or deterioration caused by
water in summer

positioning to allow easy maintenance, if possible

avoiding direct sunlight on the readout area as this would lead to
maintenance problems