RKI Instruments GX-2012 User manual

1.TurningtheGX-2012ON
Note: This start up sequence assumes the following maintenance mode items
are turned on: LNCH BRK, ID DISP, CL RMNDR, and BP RMNDR
Set to CONFIRM
a.AttachtherubbernozzleorsamplehosetotheGX-2012’s
quickconnectinlettting.
b.Ifahoseisused,attachprobetohose.
c.ToturnontheGX-2012,pressandbrieyholdthePOWER
ENTERbuttonuntilyouhearabeep.TheGX-2012willbegin
itswarmupsequence.Thefollowingscreensmayappear
duringthewarmupsequence:
CALTIMEREMAINING(factorysettoappear)
• Iftheinstrumentifoverdueforcalibration,theGX-2012
displaysCAL.PresstheRESETSILENCEbuttonto
continue.
• Calibrationshouldbeperformedassoonaspossible.
BUMPTIMEREMAINING(doesnotappearwith
factorysetting)
• Iftheinstrumentisoverdueforbumptesting,the
GX-2012displays“tEStB--Limit”.PresstheRESET
SILENCEbuttontocontinue.
• Abumptestshouldbeperformedassoonaspossible.
SENSORFAILURE
• IftheGX-2012experiencesasensorfailureduringstart
up,theLCDwilldisplayFAILandindicatewhichsensor(s)
failed.TocontinueoperationpressandreleaseRESET
SILENCEtoacknowledgethefailure.Gasreadingsfor
thatsensorwillbereplacedby“---”.
• Itisnecessarytoreplacethesensorandrecalibrate
beforetheGX-2012isused.
2.MeasuringModeScreen
a.AfterwarmuptheGX-2012willdisplaythefollowing:CH4
0%LEL,OXY20.9%,CO0ppm,H2S0.0ppm(somereadings
maynotappearifsensorsarenotinstalled).
b.Ifthereadingsarenotdisplayingfreshairvaluesasabove,
youmustperformaFreshAirAdjustment.
QuickReferenceGuideForModelGX-2012
Note: Turn on and adjust the GX-2012 gas monitor in a known fresh air area.

3.PerformingaFreshAirAdjustment
a.PerformingaFreshAirAdjustmentwillsettheCH4,CO,and
H2Schannelsto0andtheOXYchannelto20.9%.
b.Taketheinstrumenttoafreshairareawheretheairisfree
oftoxicorcombustiblegasandhasnormaloxygen(20.9%).
c.PressandholdtheAIRbutton.Thedisplaywillpromptyou
tocontinueholdingtheAIRbutton.
d.ThedisplaywillpromptyoutoreleasetheAIRbutton.The
GX-2012willautomaticallysetthefreshairreadingsforall
channels.
e.TheGX-2012isnowreadyforuse.
Note: If fresh air adjustment fails, refer to user’s manual.
4.FlowIntegrityTest
a.Placengeroverendofprobeorrubbertip.TheGX-2012
shouldgointoowfailinafewseconds.
b.PresstheRESETSILENCEbuttontorestartthepump.
c.Iftheinstrumentfailstoindicateowfailure,checkprobe
andhoseconnectionsforleaks.
5.BreathTest(forinstrumentsequippedwith 
 oxygensensor)
a.Ifconnected,removehoseandprobe.
b.Exhaleneartheinletttingoftheunit.Observethatthe
oxygenreadingdropsbelowthealarmsettingof19.5%and
theaudibleandvisualalarmsareactivated.
c.PresstheRESETSILENCEbuttontoresetthealarmsthe
reconnecthoseandprobe.
6.TurningtheGX-2012OFF
 PressandholdthePOWERENTERbuttonuntilTURNOFF
hasdisappearedfromthebottomofthescreen.
TheGX-2012isnowoff.
QuickReferenceGuideForModelGX-2012
PN71-0249RKRev0
RKIInstruments,Inc.33248CentralAve,UnionCity,CA94587
Phone(510)441-5656•(800)754-5165•www.rkiinstruments.com
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