Atest Gaz Alpa MOD LED8, Руководство пользователя

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5 User interface
Gas Detector performs continuous measurement of gas concentration in the surrounding area and conducts
systematic tests of performance of Measuring Heads. Depending on the result of of these steps, status may
be as follows:
OK – “device working properly”,
WARNING – “a small gas leak”,
ALARM – “a critically high leak”,
FAILURE – “system or gas detector damage has been detected.”
5.1 OK
This is the basic mode of operation when everything is fine “OK”. This status is identified on the basis of
only green lamps being on. In this case all relays are off, except for the FAILURE relay.
The control unit does not require special attention, except:
frequent inspection of indications,
systematic commissioning of servicing – as described in the final section of this documentation.
5.2 WARNING
This condition occurs when a small gas leak is detected that requires user notification in order to take
appropriate control measures.
This status is indicated by:
red ALARM light blinking , corresponding to the alarm sensor that has detected the status,
in this status an intermittent beep will be emitted. This signal can be blocked by pressing the
CONFIRM / CLEAR – the system will read this as a note that the user has noticed the situation. This
signal will sound again after 30 minutes. The warning status does not result in turning on the
external sound signal,
the OC WARNING signal is enabled, to control the optical indicator,
the WARNING relay switches on.
Actions to be taken when WARNING is signalled:
– check the cause which, for example may be:
a temporary gas leak due to maintenance work. In this case, the staff involved in these works are
required to remove the leak and ventilate the facility,
uncontrolled gas leak from a crack. In such a situation this fact should be reported to maintenance
technician or another person responsible for the facility,
disruption of the gas detector with other substances (final part of the documentation) – these
substances should be removed from supervised premises,
shifting of the gas detector characteristics. Gas detectors, over time tend to drift towards zero in
the direction of the alarm. Therefore, if they are not periodically re-calibrated, it is possible that
the warning threshold may shift to the level of clean air. The reason for this should be suspected
when technical services have checked using an appropriate device that there is no gas leaks in the
building, and there was no presence of interfering substances.
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User Manual: POD-006-ENG R03