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11. Sensor protection & service
If there is a gas concentration (>2,000ppm) the sensor will switch off automatically.
This avoids its irreversible destruction.
In this case there are optical (LED elements are flashing) and acoustic (ALARM-LED
blinks) warnings. Measuring can be started again by the ON/OFF-button.
A defect sensor is indicated by all segments glowing except these two that are in the
middle of the LED-Indicator.
In this case please contact the producer or an authorised service point.
