11066 Searchpoint Optima Plus v2.indd - Merkantile

MAN0551.P65 Issue 06 - 03/042108M05016. CALIBRATION5. Do not attempt to perform calibration during periodsof exceptionally low or high atmospheric pressure.(Normally associated with unusual or extremeweather conditions. Calibration is not recommendedduring storms, very strong winds or highlychangeable weather conditions.)6. Ordinarily, during production Optima Plus units arecalibrated with gas in the main measurementchamber, which is where they will detect gas inoperational service. The response in the RGC is notproduction calibrated. The RGC is not recommendedfor calibration or for high accuracy calibration testing.(The only exception to this is where units are beingused to measure high %V/V gases using the RGC asa flow cell. In this instance, the units are productioncalibrated with gas in the RGC.)7. Always allow unit’s to stabilise in the operatingenvironment for at least 30 minutes (ideally 1 hour)before performing gas calibration.Equipment Required:Gassing CoverInstrument Air (if a zero in ambient air cannot be guaranteed)Calibration Span Gas (i.e. 2.5% V/V methane for 50% LELoutput or 2.2% V/V for 50% UEG)SHC-1 Handheld Interrogator68