Detection, Protection, Innovation
• Fault Alarms
− Zero Fault
• The ‘Zero Fault’ flag and a flashing spanner appears, after warm-up, if the
instrument is switched on in the presence of gas or the instrument has been
unable to zero all sensors correctly. The audible alarm sounds, once every 2
secs, and the red LED flashes.
• The instrument can still be used to detect and alarm on the other sensors
fitted. Press the right button, as per the screen prompt, to continue. A flashing
spanner symbol will be displayed against the faulty sensor.
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