MSA ULTIMA X5000 - How to Calibrate an Oxygen Xcell Sensor; How to Calibrate an XIR PLUS Sensor; Xcell Catalytic Bead LOC over Range; Calibration Confirmation and as Found;As Left Values

5.7 HowtoCalibrateanOxygenXCellSensor
Anoxygenspangascylinderisnotneededifthesensorisinanareathatmaintainsambientairconditions.Followthesame
processforXCellsensorsasdescribedin5.8HowtoCalibrateanXIRPLUSSensor.Whenthedisplayprompts"Apply
SpanGas",simplyallowthecountdowntooccurwithoutapplyinggas.
Ifthesensorislocatedinanareaofnormallyloworenrichedoxygen,thena20.8%oxygensamplemustbeapplied.
5.8 HowtoCalibrateanXIRPLUSSensor
AfullspancalibrationisnotrequiredfortheXIRPLUSsensors.Anydegradationofthesensor'sperformanceisassociated
withslightdriftsinitszeroresponse.Restoringthesensor'szeroistypicallysufficient.
TheXIRPLUSsensorguardcomesattachedtotheXIRPLUSsensor.TheXIRPLUScalibrationcapisplacedoverthe
sensorguardsothatitiscompletelycovered.Lineupthecapsothatthesensorguardstemprotrudesthroughthe
calibrationcap.Zeroorcalibrationgastubingisthenattachedtothesensorguardviathestem.
WARNING!
ThegreencalibrationcapmustberemovedfromtheXIRPLUSaftercalibration.Failuretodosocouldrestrictgasflowto
thesensorandresultinerroneouslylowreadings.
Failuretofollowthiswarningcanresultinseriouspersonalinjuryordeath.
NOTICE
Ifthecalibrationcapcannotbeused(suchasforaremotesensorapplication),ambientwindconditionsmustbeminimized
duringcalibrationtoavoidacalibrationwithincreasedsensitivity.
TheXIRPLUSsensorcanbecalibratedtoavarietyofothertargetgases.Calibratingtoadifferentcalibrationgaswillalign
thesensor'saccuracytothatgas.Referto9Appendix:CalibrationGuideforAdditionalGasesforcalibrationsettings.Note
thattheXIRPLUSsensorisageneralhydrocarbonsensor,andcalibratingtoanothergaswillnotpreventitfromseeing
otherhydrocarbonsintheatmosphere.
5.9 XCellCatalyticBeadLOCOverRange
Catalyticbeadsensorsrequirethepresenceofoxygeninordertosensecombustiblegas.Intheeventofverylarge
combustiblegasleaksthatexceed100%LEL,enoughoxygencanbedisplacedsothatthesensor'sresponsetogasisno
longerproportionaltothecalibrationprofile.TheXCellcatalyticbeadhasalockingfailsafemechanismthatpreventsthe
falsereportingofasafeconditionwhilethe%LELconcentrationisstillabove100%LEL.Whenthegasconcentration
exceeds100%LEL,thesensorwillgointoLOCoverrange.
TocleartheLOCoverrage,theuserneedstoacknowledgeandcalibratethesensor.ToacknowledgeLOCoverrange,
placeonefingerovereachoftheEZtouchbuttonsandholdfor1secondbeforereleasing.Thiswillallowarecalibrationof
thesensortocleartheLOCcondition.
WARNING!
EnsurethattheareahasbeenclearedofgasbeforeacknowledgingtheLOCOverRangeandrecalibratingthesensor.
Failuretofollowthiswarningcanresultinseriouspersonalinjuryordeath.
5.10 CalibrationConfirmationandAsFound/AsLeftValues
TheULTIMAX5000GasMonitorrecordsthedateofthelastsuccessfulcalibrationaswellastheAsFound/AsLeftvalues.
ThisdatecanthenbedisplayedontheOLEDdisplayundertheStatusMenu.
US Ultima X5000 Gas Monitor 67
5 Calibration