Atest Gaz Alpa EcoTerm XT, User Manual

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1 Preliminary information
1.1 Purpose
The Alpa EcoTerm XT Gas Detector is an advanced and versatile device designed for detection of methane
concentration in public access facilities, such as boiler houses and industrial halls.
The Alpa EcoTerm XT Gas Detector is not designed for installation in areas with potentially
explosive atmospheres.
A catalytic sensor was used as an element detecting the presence of a hazardous gas. This solution is
characterized by a high resistance to the change of environmental conditions, such as temperature,
humidity, pressure. The Alpa EcoTerm XT Gas Detector is also characterized by high resistance to the
presence of disturbing factors which eliminates generation of false alarms.
More details on catalytic sensors can be found in Appendix [2].
Basic operational features include:
safe, low voltage electric circuits,
adjustable intensity of the detector warning light to local conditions (height of a facility, layout of
detectors)
easy installation,
possibility to arrange the components as a ‘bus layout’ or a ‘star layout’,
quick calibration of the detector by simple replacement of the MniPel Head (reduction of the
calibration time),
three alarm thresholds,
indication of detector failures or interruption of the monitoring loop,
log of events to enable viewing historical events associated with exceeding of alarm thresholds or
detector failures,
long term operation with steady parameters.
These features, at an extremely attractive price, make Alpa EcoTerm XT Gas Detector an ideal solution for
low cost applications, e.g. in public construction.
1.2 Description of operation
The Alpa EcoTerm XT Gas Detector is one of the elements of the gas detection system. It performs cyclical
measurements of gas concentration in the air. Information about exceeding a certain threshold is
transmitted using the controls located on the bottom side part of the housing (see figure 1) and output
current signal. In addition, if it works in an alarm loop system (see section 6.3), at its input (via an XT
T- connector) a current signal can be passed from the next detector. This signal is compared with the local
value and a signal corresponding to a status of a higher priority is transmitted to the output (see table 1).
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User Manual: POD-044-ENG R01