Detection, Protection, Innovation
• Fault Alarms
− Zero Fault
• If a Zero Fault flag and a spanner appears above gas type, then sensor requires
replacement or an electrical fault exists.
• If a Zero Fault flag and a flashing spanner symbol
alternating with a zero LEL reading appear,
apply test gas for 2 minutes to allow the display
to return to zero. Switch instrument Off and On again.
• If a Zero Fault flag and a flashing spanner symbol
alternating with an LEL gas value appears, leave
instrument on for 30-60 mins. Switch Off and On.
alternating
with
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