Atest Gaz Sigma SmArt, User Manual

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6.4.12.2 Assembly and disassembly of the sensor in the measuring head
It is recommended that all manipulations with the measuring head were performed by the
manufacturer's service or trained personnel. Replacing the sensor must always be connected
with the calibration of the detector. Any manipulation must be performed with the detector
power of.
To remove the head cover, it is necessary to:
loosen the locking screw with 1.5 mm allen key.
grab the gland, do not allow it to rotate (due to the possibility of damage to the connector inside
the enclosure),
unscrew the sensor cover,
remove the old and install a new sensor in the head, paying attention to the correct setting of the
connectors,
apply a small amount of technical petroleum jelly onto the thread of the gland
tighten the sensor cover (until resistance is noticed),
tighten the locking screw (if the screw does not screw in smoothly until it is fully concealed, it
means that the components of the head are mounted incorrectly),
supply calibration gas to make sure that the detector works properly.
Not all errors resulting from improper assembly are detected by the diagnostics system of
the detector. Each disassembly and assembly of the measurement head must be verified by
supplying gas and checking the detector’s reaction to gas.
If it is necessary to unscrew the gland from the head, first disconnect the strip inside the housing.
6.4.13 Maintenance
6.4.13.1 Basic maintenance tasks associated with maintaining explosion protection
Maintenance of the flameproof surface and threads using acid free vaseline.
Checking the status and cleaning the sinters.
Checking the tightness of cable gland.
6.4.13.2 Replacement of cable glands
To replace the cable gland you should:
Unscrew existing cable gland from the equipment,
apply a non-setting grease on the thread of new cable gland,
screw in the new cable gland.
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User's Manual: POD-009-ENG R07