Atest Gaz Alpa EcoDet XT, User Manual

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9.4.2 Replacement of consumables and fast wearing parts
Service life of consumables and fast wearing parts is specified in Table 7.
9.4.2.1 Replacement of the MiniPel measuring head
In pace with operation time of the detector its sensor subjects to natural deterioration of its metrological
parameters. That phenomenon can be compensated by periodical and regular adjustment of the sensor
indications until the moment when the deterioration reaches the boundary threshold and the sensor must
be replaced. It is generally assumed that a sensor must be substituted with a new one when its sensitivity
drops below 50% of the initial level.
However, the sensor itself is not a detachable component and the entire measuring head must be replaced
– see Table 7.
To substitute a measuring head the following procedure must be followed:
switch off power voltage for the detector,
undo the locking screw (see Figure 2),
remove the head from its socket and insert a new one,
retighten the locking screw,
switch the power voltage on.
9.4.3 Scheduled inspections
Scheduled inspections are recommended after each three months of the device operation. The inspection
scope should include visual inspection of the system and its components as well as operability tests of all
detectors:
supply gas to the first of detectors and check the response of a control unit (it should report the
WARNING (OSTRZEŻENIE) or ALARM status, depending on concentration of test gas supplied to
the detector),
repeat the test for all remaining detectors.
To supply test gas in correct manner a calibration kit and appropriate reference gas should
be used. The reference gas is propane C
3
H
8
with the concentration of 30% to 40% of LEL (See
Section 12.
Unprofessional tests of a gas detector, i.e. by supplying gas of unknown composition and
concentration to the detector, for instance from a gas lighter, are forbidden. Such behaviour
inevitably leads to poisoning of the sensor and decalibration of the detector.
9.4.4 Maintenance
Device must never be cleaned with agents that contain solvents, white spirit naphtha or alcohols.
The device needs no other maintenance beside cleaning external surface of the enclosure. These surfaces
should be wiped with a soft cloth moistened with water and slight amount of a mild detergent.
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User Manual: POD-043-ENG R03