Atest Gaz Sigma SmArt, User Manual

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1 Preliminary information
1.1 Intended use and principle of operation
Gas detectors are stationary devices, designed to detect and monitor levels of toxic gases, explosive gases
and oxygen in the ambient atmosphere.
The gas detectors measures the concentration of a given component, and then turns it – depending on the
variety (described below) – to understandable signal for other devices of the gas detection the system. In
addition to the implementation of the measurement, the detector analyses the value of the measured
concentration and may provide information about exceeding the following threshold values:
warning 1,
warning 2,
alarm,
gas overload (threatening with the sensor damage).
In addition to the above, the gas detector is a self-diagnostic device – and in the case of detection of
malfunctions, it informs the user about it.
During operation of the detector twofold irregularities may occur – or those that prevent continued
operation of the detector and require immediate intervention of the service (critical failure), or those that
are only a symptom – the user should be notified thereof (e.g. by the control unit), in order to plan an
overview at a convenient date (non-critical failure, overload).
1.2 Functional properties
Main characteristics
Variety of detected gases and vapors.
Wide operating temperature range.
Ability to perform with a local LCD / FLED display.
Optional versions of the housing: aluminum or acid resistant steel.
Basic functionalities
Non-invasive calibration and configuration – the gas detector can be calibrated and parametrized
(e.g. the alarm thresholds) in hazardous areas without opening the housing or turning of other
parts of the gas detection system (only for RS-485).
Output signal:
• SmArtGas 3: RS-485, 4 – 20mA, relay outputs.
• Sigma SmArt: RS-485.
Parametrization and calibration without the use of mechanical parts.
Electronic compensation of the influence of ambient temperature.
Self-diagnosis function.
Storing, in the memory of the gas detector such parameters as: substance CAS number, location
name, serial number, the intervals between mandatory calibrations, etc.
No mechanical control elements.
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User's Manual: POD-009-ENG R07