MSA ULTIMA X5000 User Manual

2.6 XCellSensorsOptimizedforFixedGasApplications
XCelltoxicandcombustiblecatbeadsensorsaredevelopedandmanufacturedbyMSA.Nowoptimizedforfixedgas
applications,theXCellsensorplatformisavailableintheULTIMAX5000andprovidesmultiplebenefits,includinga
standard3-yearwarrantyonallXCellsensors.
OneimportantoptimizationforfixedgaswasincorporatingtheGMcatalyticbeadintotheXCellsensor.
TheXCellOxygensensordoesnotuselead,butratheranon-consumingreactionchemistry.TheXCellOxygensensoris
expectedtolastwellover3-yearsandcanbesafelystoredontheshelfforatleast1yearwithoutsensorperformance
degradation.Changesinbarometricpressureacrosstherangeof86kPa-108kPahaveanegligbleeffectontheoperation
ofthesensor.
2.7 TruCalSensingTechnologyforCOandH
2
SElectrochemicalSensors
UsingpatentedpulsechecktechnologyandproprietaryAdaptiveEnvironmentalCompensation(AEC)algorithms,allXCell
sensorswithTruCalverifyoperationbyactivelyadjustingthesensoroutputforchangesinsensitivity.SomeXCellsensors
withTruCalalsoincludeDiffusionSupervision,whichmonitorsthesensorinletforobstructionsthatcouldpreventgasfrom
reachingthesensor.
Everysixhours,anelectricalpulsestimulatestheXCellsensorsimilartohavingactualcalibrationgasapplied,providinga
snapshotofthesensor’ssensitivityatthetimeofthepulse.Usingthissensitivitysnapshot,thesensorcandiagnosesensor
failureslikeelectrodepoisoning,electrolyteleaking,orelectricalconnectivityissues.
AECusesthesensitivitysnapshotsprovidedbythepulsechecktoadjustsensoroutput,compensatingforenvironmental
impactsonsensoraccuracy.IftheAECadjustmentisgreaterthanexpectedbasedontypicalenvironmentalimpact
variations,thetransmitterLED’swillslowlyflashGREEN,alertingusersthatthesensorshouldbecalibratedtoresetthe
AECcycle.UserscanalsoenableaCalibrationAlertfunctionthatwillsendamilli-ampsignalontheanalogoutputtothe
controlroom.Theresultisasensorthatactivelyself-monitorsforoperationandaccuracy,withfarfewermanual
calibrations.
Diffusionsupervisionactivelymonitorsthesensorinletforobstructions.Ifanobstructionisdetected,thesensorwillgointoa
faultmodetoalertusersandthecontrolroomthatitisnotseeinggasduetoanobstruction.Objectsresidingdirectlyonorin
thesensorinletthatresultinasignificantimpacttothegaspathareverylikelytobedetectedbyDiffusionSupervision.
Examplesincludepaint,tape,water,anddirt.Smallamountsofthesematerialscanbevisibleontheinletwhilenot
impactingthegaspathenoughtotriggeraDiffusionSupervisionFault.Afaultsignalwillonlybesentoutwhenthesystem
determinesthattheamountofmaterialthathasaccumulatedonorinsidethesensorinletisnegativelyaffectingthegas
path.
ActualTruCalsensorperformancewilldependontheapplication,backgroundgasexposure,andenvironment.Tovalidate
XCellsensorswithTruCal,itisrecommendedthatusersfollowtheirregularcalibrationcycleandrecordthe“asfound”and
“asleft”values.Thisdatacanbeusedtoextendthetimebetweencalibrationsdependingontherequiredspecificationof
theapplication.
2.8 SafeSwap
TheULTIMAX5000comeswithpatentedSafeSwaptechnology,whichallowsuserstochangeorreplaceXCellsensors
withoutneedingtopowerdowntheinstrument.Foraddedconvenience,theULTIMAX5000comeswithSwapDelay
enabledbydefault;afeaturethatgivesusersa2minutewindowtochangesensorswithouttriggeringafaultcondition.For
moreinformationonSafeSwapandSwapDelay,see4.2.1InstrumentSettings.
WARNING!
• Aspartoftheproductcertification,itwasverifiedthatoptionalcommunicationfunctionsofthisgasdetection
instrumentwhileoperatingatthemaximumtransactionratedonotadverselyaffectthegasdetectionoperationand
9 Ultima X5000 Gas Monitor US
2 Description

MSA ULTIMA X5000 Specifications

General

Ingress Protection	IP66/67
Sensors	Electrochemical, infrared
Communication	HART, Modbus
Target Gases	Combustible gases, toxic gases, oxygen
Approvals	ATEX, IECEx, UL, CSA, SIL 2