11066 Searchpoint Optima Plus v2.indd - Merkantile

MAN0551.P65 Issue 06 - 03/042108M05018. FAULT FINDINGFault / ProblemUnit’s outputappears to bedrifting.Cause:Remedy:Cause:Remedy:Cause:Remedy:Cause / RemedyCorrect response to genuine, low levelfluctuations in gas concentration wherethe unit is installed.A commonly misinterpreted problem whichis resolved when the source of thefluctuating gas leak is finally identified. If aunit is transmitting a gas reading, doublecheckthe gas concentration at the exactpoint where the detector is installed usinga sensitive portable gas detector that hasbeen carefully zeroed. (Do not use astandard catalytic detector on a 0-100%LEL range, they are not sensitive enoughto reliably detect low % LELconcentrations.)Build-up of contaminants on optics,especially oil-mist, exhaust fumes, greaseand solvents.Check that dust barrier is fitted correctly,clean and intact. Closely inspect theoptics to be sure that nothing is buildingup on them. Clean and re-zero unit ifnecessary.Exposure of unit to extreme temperatures.Check unit’s FAULT / WARNING log tosee if it has records of Temp LimExceded. If temperature problems areconfirmed, either relocate or shield thedetector or consider use of a samplingsystem.94