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ecom-ST 1.0
8.2 Gas sensors
The gas sensors are calibrated with fresh air as the reference gas each time
the device is switched on. New sensors age in the course of use due to wear
and tear of the reagents (oxygen sensor) and due to contamination or
exposure to concentrations above the nominal measuring range (toxic
sensors).
The condition of the sensors is permanently monitored by the device. In the
"Control" menu, the values for the output voltage of each installed gas sensor
can be checked. The reference values of the sensors are:
Sensor
Reference value output voltage
O
2
12000 mV
Others
0 mV (±150 mV)
NOTE
The O
2
sensor must display a value >7000 mV. If this is not the case,
the sensor must be replaced. Contact the ecom service centre next
to you!
NOTE
If an error message occurs during the calibration phase, a further
calibration phase can help to calibrate the sensors sufficiently. If
the error message persists, the device must be checked.
NOTE
The CO sensor is protected from high concentrations by overload
protection (see chapter "CO overload protection").
