Atest Gaz SmArtGas 4, User Manual

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Setting of jumpers Operation mode
SOURCE of electric current (default setting)
SINK for electric current
Table 8: Configuration of the embedded source of electric current
6.4.2 End-line terminals
The communication port is furnished with end-line terminals. Configuration of these terminals needs
opening of the device housing to insert a jumper into the terminal connector (TERM.).
Setting of jumpers Operation mode
Terminal for the serial port is off (default setting)
Terminal for the serial port is on
Table 9: Configuration of the serial port terminal
6.5 Troubleshooting
Details for detects and failures reported by the detector are provided in appendix [5].
6.6 Periodical operations
The detector, similarly to all gas sensors, are components that subject to ageing and wear due to
environmental influences. Thus, a variety of maintenance operation must be carried out within a regular
schedule.
Periodical operations include:
zero point adjustment,
calibrations,
replacement of fast wearing parts,
periodical inspections.
6.6.1 Resetting
Gas sensors are characterized by a certain drift of zero over time. It's mean that during operation, the
detector may indicate minor gas concentration despite the fact that in reality there is no gas in the building.
In such a situation, the reset function should be used (available in devices cooperating with the detector,
e.g. in the control unit).
In some detectors configurations, the mechanism for automatic deletion of this drift is active. In this case,
you do not need to use the above-mentioned zeroing function, and its use in this case can only speed up
the automatic zeroing.
The reset function is available only for a narrow range of detector’s indications (there is not hazard of
resetting high concentrations).
It is recommended to apply clean air to the detector before performing the zeroing function.
6.6.2 Calibration
6.6.2.1 General rules
The gas sensor applied for the device is a components that is subject to ageing and other environmental
impacts with decrease of its sensitivity as a natural effect.
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User Manual: POD-061-ENG R03