Atest Gaz Alpa EcoWent XT, User Manual

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possibly frequent readout, preferably daily,
systematic ordering of inspections (see Subsection 9.4.3).
1.2.2 Warning 1 (threshold 1) / Warning 2 (threshold 2)
It is a condition that occurs when a low gas concentration is detected that requires informing the user.
Actions to be taken:
check the cause, which can be e.g.:
• a leak at the facility,
• interruption of the detector operation by other substances (e.g. a high-concentration solvent
or fuel vapours) – the substances should be removed from the supervised premises,
• shift of the detector characteristics. Over time, the detectors tend to zero drift. Therefore, it
they are not calibrated periodically, it may happen that the warning threshold will move to the
level of clean air. The cause of this should be suspected in a situation when competent services
checked the lack of gas leakage in the facility with a special device, and no presence of
interfering substances was found.
1.2.3 Alarm (threshold 3)
This state occurs when the gas concentration exceeds the alarm threshold (3rd threshold).
Actions to be taken:
remove bystanders from the danger zone,
as far as possible, allow the airing of the endangered rooms – by opening windows and doors (if
the control unit does not automatically switch on the ventilation).
1.2.4 Failure
Simultaneously with the process of gas concentration measurement, the detector performs a number of
diagnostic measurements in order to validate its own work and the system operation.
The internal failures signalled by the detector concern problems with the sensor.
The system failures signalled by the detector may concern:
breakage of the bus,
abnormal values of currents flowing into the detector,
incorrect settings of the configuration switch,
breakage of the connection with the Alpa EcoDet XT detector.
1.2.5 Warm-up
After powering the detector, the parameters of the sensor stabilize for some time. In this state, the detector
does not conduct measurements. This state takes about 1 minute, after which the sensor starts to operate
normally.
2 Safety
Do not allow cutting or damaging the insulation of the wires connecting the system.
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User Manual: POD-042-ENG R04