Atest Gaz Sigma SmArt, User Manual

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the influence of the gas temperature – a substance heavier than air when heated becomes lighter
and migrates upwards, but after cooling, it can flow down toward the floor,
pressure and the expected nature of outflow (leakage / gush),
volatility of gas – in the case of substances of low volatility, the detector should be located as close
as possible to the expected leak,
the impact of environmental conditions – detectors should not be exposed to the direct impact of
water or other chemicals, e.g. cleaners during cleaning of the facility. In particular, care must be
taken to prevent flooding / contamination of the steel sinter, since this will lead to the loss of the
measuring performance of the detector,
the detector should also be protected from direct exposure to dust, sunlight, rain and wind. When
installing the detectors directly outdoors, it is necessary to use suitable water-splash shield or
weather housing. The detector should not be exposed to direct environmental conditions,
Failure to follow these rules leads to the damage of the sinter or the sensor.
direction of ventilation – the detectors should be located in areas in the ventilation path from the
place of leakage to the extraction unit. In the event that the route may be variable, four detectors
should be provided so as to "circumnavigate" a potential source of emissions. In the case of
outdoor installation, it is necessary to take into account the expected direction of the wind,
likely whereabouts of the people in relation to emission sources – detectors should "fence of" the
personnel from the source,
mechanical shock – the detector is made in high strength aluminium casing, resistant to very high
mechanical shocks. However, it is necessary to protect the detector from damaging exposures. In
the case of damage, especially the surface of flameproof connectors, threads and sinter the
detector must be turned of to protect cables and it is necessary to contact the service.
This requirement must be absolutely respected for equipment operating in potentially explosive
areas.
access – the location should make it possible to perform checks and detector adjustment as well
as its replacement or disconnection. When selecting the measuring point, it is necessary to take
into account the subsequent development that will hinder the works carried out at the detector
on a facility (e.g. the walls, shelves, ventilation ducts, etc.).
6.2.2 Installation and connection
6.2.2.1 General principles
Select detectors in terms of explosion safety.
Design the supply installation and data transmission installation of the detectors in hazardous
areas.
Implement the supply installation and data transmission installation of the detectors in hazardous
areas.
Conduct a handover inspection.
Perform periodic inspections and maintenance.
The designer, contractor, maintenance person and other interested persons should consult the full
content of the regulation and properly use it.
The manufacturer shall not be held responsible for the design, construction, operation and
maintenance of the system.
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User's Manual: POD-009-ENG R07