MSA ULTIMA X5000 - Page 48

isremoved,thetransmitterwillgointofaultafteritsstartupsequence.Thisfaultconditioncanberemovedbydisablingthe
affectedsensorposition.
Disablingasensorremovesthefaultandstopscommunicationswiththesensor,thesensor’sreadingonthedisplayis
removed,andthemAchannelforthatsensorpositionissetto0mA.Bydefault,theULTIMAX5000hastheSensor2
positiondisabled.Ifatanytimeasensorisconnectedtoapositionthatisdisabled,theULTIMAX5000willautomatically
enablethatsensorposition.
Todisablethesensorafterremoval:
1. ScrolltoSettingsandselectit.
2. SelectSensor.
3. Scrollandselectthesensoryouwanttodisable(Sensor#1orSensor#2).
4. ScrollandselectDisableSensor.
Onlyonesensorcanbedisabledatatime.Thetransmitterwillnotallowbothsensorpositionstobedisabled
simultaneously.
TheULTIMAX5000onlyallowsasensortobedisabledafterthetransmitterhasgoneintoSensorMissingfault.
DiffusionSupervision
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.
EvenifaDiffusionSupervisionFaulthasnotbeentriggered,itisgoodpracticetoclearanyforeignmaterialfrom
thesensorinletifanyisobservedwhileinspectingthesensor.
ToenableordisableDiffusionSupervision:
1. ScrolltoSettingsandselectit.
2. SelectSensor.
3. ScrollandselectDiffusion Supervision.
4. ScrollandselectEnableorDisable.
5. ScrollandselectSave.
US Ultima X5000 Gas Monitor 48
4 Operation