MSA ULTIMA X5000 - Page 46

SpanValue
Thespanvalueisusedtosetthecalibrationpoint.Thedefaultspanvaluesareapproximatelyhalfofthetotalrangeofthe
sensoraspurchased(seeTable14).Iftherangeischanged,thespanvalueshouldalsobechangedtoincreaseaccuracy
overthefullscalerange.
Beforechangingthespanvalue,theusershouldensurethattheappropriateconcentrationofcalibrationgasisavailable.
Theconcentrationofthecalibrationgasshouldmatchthespanvalue,exceptifusingpropanetocalibrateacombustible
sensortoadifferentgascrossreferencevalue.
Tochangethespanvalue:
1. ScrolltoSettingsandselectit.
2. SelectSensor.
3. ScrollandselectSpanValue.
4. CurrentSpanValueisdisplayed.
5. Enterdesiredspanvalue.
6. ScrollandselectSave.
Defaultandrangeofavailablespanvaluesdependsonthesensortype.SeeTable14fordefaultandrangeof
spanvalues.
SensorRange
AllXCellsensorshaveadjustablesensorranges.Thesensorrangecannotbesetbelowthecurrentalarmsetpoints.The
usermayneedtofirstloweralarmsetpointsand/orspanvalueinordertoadjustsensorrangetodesiredlevel.Theuser
shouldalsoconsideradjustingthespanvaluetoaccommodatethechangedsensorrangesothatthespanisinthecenterof
therange.
Tochangethesensorrange:
1. ScrolltoSettingsandselectit.
2. SelectSensor.
3. ScrollandselectSensorRange.
4. Currentsensorrangeisdisplayed.
5. Enterdesiredsensorrange.
6. ScrollandselectSave.
Changingthesensorrangewillchangetheanalogoutputvaluesforalarmlevels.
GasTable
TheULTIMAXIRPLUScombustiblesensorcanbecalibratedtoawiderangeofcompounds,see9Appendix:Calibration
GuideforAdditionalGasesforalistofgases,spanvalues,andgastablevalues.
TheXIRPLUSsensorisonlyperformanceapprovedforMethaneandPropane.
US Ultima X5000 Gas Monitor 46
4 Operation