Disturbance sources and "false alarm"

"False Alarms"

False alarms occur rarely. If a detector is alarming it often means that something is affecting the detector e.g.:

      - Minute concentrations of gas in the room
      - Incorrect calibration of the equipment
      - The equipment has not been inspected and maintained regularly
      - Other gases in the room e.g.
             · solvents/detergents
             · exhaust gases
             · smoke (e.g. cigarette smoke)
      - Other compounds, e.g. refrigerant saturated compressor oil after draining during maintenance etc.

False alarms may occur in all gas monitoring systems. The system based on IR-technique is the most selective and therefore less prone to false alarms.

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