Riken keiki Gd-f4a-1 User manual



PT2E-1512



RequestfortheCustomers

•Readandunderstandthisoperatingmanualbeforeusingthedetectorhead.

•Usethedetectorheadinaccordancewiththeoperatingmanual.

•Regardlessofwarrantyperiod,weshallnotmakeanyindemnificationforaccidentsanddamage

causedbyusingthisproduct.

Theindemnificationshallbemadeonlyunderthewarrantypolicyofproductsorparts

replacement.

•Becausethisisasafetyunit,aregularmaintenanceforeverysixmonthsanddailymaintenance

mustbeperformed.

•Ifanyabnormalitywasfoundinthedetectorhead,notifythemtoRIKENKEIKIimmediately.



OPERATIONANDMAINTENANCEMANUAL

FOR

RIKENOXYGENGASDETECTORHEAD

GD-F4A-1



[CAUTIONSONOPERATION]



Thisisafixedtypegasdetector(head)andalarminstrumenttodetectoxygengasinair.The

gasalarminstrumentisasafetyinstrument,notananalyzernormeasuringinstrumenttomake

quantitativeandqualitativeanalysisormeasurement.

Pleaseunderstandfollowingpointsandusethisdetectorheadcorrectly.



1. The indication on this detector has some changes against fluctuation of atmospheric

pressure.Especially,takecareaboutalarmactionatthetimeofdepressioncausedby

typhoon.

Itmayalsofluctuateagainsttheenvironmental(temperature,humidity,etc.)changearound

detectorhead.



2.Alarmlevelforgasalarminstrumentshallbesetwithintheperformanceoftheinstrument.

Ourstandardalarmlevelis18%byvolumeforthepreventionofoxygendeficiency.



3.Thisisnotcontrolequipment,butasafetyinstrument.

Usethealarmcontactfromgasalarminstrumentonlyforexternalalarmlightorbuzzer.

Andtheanalogoutputsignalshallbeusedonlyforexternalindicatororrecorder.

Wedonotassumeliabilityforanyaccidentordamagecausedbyothercontrolpurposethan

theabove.



4.Tomaintaintheperformanceofthisgasdetector,theregularmaintenanceserviceincluding

theregularpartsreplacementandadjustmentdescribedinthismanualshallberequired.

Alsoevery6monthsregularmaintenanceandgascalibrationarerequiredsincethisisa

safetyinstrument.



TABLEOFCONTENTS

１．OUTLINEOFTHEPRODUCT

１−１． Preface……………………………………………………………………… 1

１−２． Purposeofuse……………………………………………………………… 1

１−３． DefinitionofDANGER,WARNING,CAUTIONandNOTE ………………… 1

２．IMPORTANTINSTRUCTIONSFORTHESAFETY

２−１． Dangercases………………………………………………………………… 2

２−２． Warningcases………………………………………………………………… 2

２−３． Cautioncases………………………………………………………………… 2

２−４． Cautionforexplosionproof(Incaseofintrinsicallysafedesign)…………… 2

３．PRODUCTCOMPONENTS

３−１． Externaldrawing……………………………………………………………… 3

３−２． Nameofeachpartandfunctions…………………………………………… 4

３−３． Systemcomposition………………………………………………………… 4

４．HOWTOUSE

４−１． Beforeusingthedetectorhead……………………………………………… 7

４−２． Precautionsforinstallationpoints…………………………………………… 7

４−３． Maintenancespace………………………………………………………… 7

４−４． Howtoinstall………………………………………………………………… 8

４−５． Cautionatwiringconstruction……………………………………………… 8

４−６． Applicablecable…………………………………………………………… 8

４−７． Exampleofcableconnection……………………………………………… 8

４−８． Cautionatpipingworks……………………………………………………… 10

４−９． Exampleofpipingconnection……………………………………………… 10

５．HOWTOOPERATE

５−１． Preparationforstartup…………………………………………………… 12

５−２． Howtostartthedetectorhead…………………………………………… 12

５−３． Howtoexit…………………………………………………………………… 12

６．MAINTENANCE

６−１． Maintenanceintervalsanditems…………………………………………… 13

６−２． Calibration

６−２−１． Requiredkitandtoolsforcalibration…………………………… 14

６−２−２． Performingazeroadjustment…………………………………… 14

６−２−３． Performingaspanadjustment…………………………………… 14

６−３． Replacingthesensor

６−３−１． Replacementintervalsofthesensor…………………………… 15

６−３−２． Howtoreplacethesensor……………………………………… 15

６−４． Storageortreatmentwhennotinuseforalongperiod………………… 16

６−５． Listofrecommendablesparepartsforregularreplacement…………… 16

７．MEASURESATABNORMALCASE

７−１． Respondingtotroublealarm……………………………………………… 17

７−２． Beforeitisthoughttobeatrouble………………………………………… 17

８．DEFINITIONOFTERMS…………………………………………………17

９．PRODUCTSPECIFICATIONS

９−１． Standardspecifications…………………………………………………18

９−２． Standardaccessories……………………………………………………18

９−３． Optionalaccessories……………………………………………………18

１０．DETECTIONPRINCIPLE……………………………………………… 19



１．OUTLINEOFTHEPRODUCT



１−１．Preface

ThankyouforpurchasingourfixedtypeOxygenDetectorHeadGD-F4A-1.

First of all, verify that the model number of this product is identical with specifications

describedinthismanual.ThismanualisaguidetooperationoftheGD-F4A-1. Allparsons

whousethisdetectorforthefirsttimeandwhohaseverusedthisdetectorarerequestedto

readthroughthemanualtounderstandthecontentbeforeuse.



１−２．Purposeofuse

Thisisasuction(flow-through)typeoxygendetectorheadapplyingthegalvaniccelltype

oxygensensorandisusedincombinationwithindicator/alarmunittoshowoxygencontent.

Readtheoperatingmanualforindicator/alarmunitaswellasthismanual.

Thisunitisdesignedasdrip-proofconstructionforoutdoorinstallation.

Also,itcanbeusedasintrinsicallysafesystemincombinationwithzenerbarrier(option)tobe

abletoinstallinhazardousarea.



１−３．DefinitionofDANGER,WARNING,CAUTIONandNOTE



Thismanualcontainsthefollowingheadingstoensurethesafeandeffectiveoperation.



This message indicates that improper handling may cause serious

damageonlife,healthorassets.



Thismessageindicatesthatimproperhandlingmaycauseserious

damageonhealthorassets.



Thismessageindicatesthatimproperhandlingmaycauseminordamage

onhealthorassets.



Thismessageindicatesadviceonhandling.





DANGER

WARNING

CAUTION

*NOTE



２.IMPORTANTINSTRUCTIONSFORTHESAFETY



２−１．Dangercases



２−２．Warningcases



２−３．Cautioncases



２−４．Cautionforexplosionproof

(Incaseofintrinsicallysafedesign)



Incaseofnon-explosionpoofsystem,donotusethisunitattheplacewherecombustiblegas

mayexist.



・Donotcutthewireforprotectivegroundbothinsideandoutsideofinstrument.Or,donot 

disconnecttheconnectionofthegroundterminals.

・Beforestartingtheoperation,checkifanydefectisnotfoundontheprotectivegrounding.

・Ifthereisanydefectontheprotectivefunctionssuchasprotectivegrounding,donotstartthe

operation.

・Itisverydangerousiftheinstrumentgivesoxygendeficiencyalarm.

Takeappropriatemeasuresbasedonyourjudgmentatthattime.

・Performgascalibrationatproperinterval.

・Donotchangeorremodelthecircuit/structureofthisunit.

・Donotdisassemblethesensorsincethereisaelectrolyteinside.

Ifyourfingertouchestheelectrolyte,washyourfingerawaywithwaterimmediately.

WARNING



・Donotuseawalky-talkyaroundtheinstrument.

Theindicationmightbeaffectedbytheelectromagneticwavegeneratedbythewalky-talkyifitis

usedneartheinstrument.Whenthewalky-talkyisused,beawayenoughfromtheinstrument

nottoaffect.

・Donotcontrolotherequipmentbyusingoutputsofthisdetector.

Thisisnotcontrolequipment. Itisprohibitedtocontrolotherequipmentbyusingoutputsof

thisdetector.

CAUTION



・Donotusethisdetectorheadexpectforthemeasurementofoxygencontentinamixtureofair

andcombustiblegasorvapors,oramixtureofairandtoxicgases.

・Whencleaningthisunit,donotusedryclothbutusethewetclothnottochangethestatic

electricityonplasticpart.

CAUTION

DANGER



３．PRODUCTCOMPONENTS



３−１．Externaldrawing



Cableinlet

Cableinlet Sensor Gasinlet

Protective

ground Gasoutlet

(For U-bolt)

Cableinlet Sensor Gasinlet

Protective

round Gasoutlet

(

ForUbolt

)



３−２．Nameofeachpartandfunctions



①Oxygensensor : Galvanictypesensortodetectoxygencontent.

②Sensorretainer : Thisisaretainertoholdtheoxygensensor

(equippedwithfilterinside).

③Sensorlead : Leadwiresforoxygensignaloutputs.

④Terminalstrip : Relayedterminalforsensorleadandexternalcable.

⑤Cablegland : Entrancetoleadthecable(φ8〜φ11mm)fromoutside.

⑥Hinge : Hingeforfrontdoor.

⑦Lock : Lockforfrontdoor.

⑧Mountinghole : Mountingholetofixthisunitonthewallsurface.

⑨Protectiveearthbolt : Boltforprotectivegrounding.



３−３．Systemcomposition

(1)Intrinsicallysafesystem



Detector

head

Zenerbarrier

Indicator

/alarm

unit

Hazardousarea Non-hazardousarea

CVVS-2C1.25mm2orequivalent(max600m)cable

⑥

⑨ ⑤

③

⑦

①

②

④⑧



１．Theoxygendetectorshallbeusedasfollowingcomposition.



２．Thesafetyretainertobeconnectedwithoxygendetectorshallhavelinearcharacteristicsand

bepassedthetypeapprovalasitis.

Alsoitshallsatisfythefollowingconditions.

(1) Ratingofsafetyretainer

Maxvoltageofintrinsic-safetycircuit:Below28V

Maxcurrentofintrinsic-safetycircuit:Below600mA

Maxpowerofintrinsic-safetycircuit:Below0.75W

(2) Performancedivisionandgroup

Performancedivision:ia

Group:ⅡC

(3) Relationsbetweenallowableinductance(Lo)andallowablecapacitance(Co)

ofintrinsic-safetycircuit,andexternalwiringinductance(Lw)andcapacitance(Cw)

ofintrinsic-safetycircuit.

Lo≧Li+Lw

Co≧C+Cw

(4) Whenmakingwiringconnectionforintrinsic-safetycircuit,takecarenottoinduce

anelectriccurrentandvoltagewhichwillspoiltheperformanceofintrinsicallysafe

bytheelectromagneticinductionorelectrostaticinductiontotheintrinsic-safety

circuit.



WARNING

！

Hazardous

area Non-hazardous

area

Safetyretainer

Oxygendetector

Ｌｉ≒0

Ｃｉ≒0

≒0showsanegligiblevalue

Ｌｉ

Ｃｉ Ｌｏ

Ｃｏ

Ｌｗ

Ｃｗ



(2)Non-explosionproofsystem



(3)Componentinsidedetectorhead



Drip-proofhousing

Sensorlead

Terminalstrip

Cablegland

Shieldedcable

Oxygen

sensor

Gasinlet

Gas outlet

Detector

head

Indicator/alarm

unit

Non-hazardousarea Non-hazardousarea

CVVS-2C1.25mm2

orequivalent(MAX600m)



４．HOWTOUSE



４−１．Beforeusingthedetectorhead

Allpersonswhousethisdetectorforthefirsttimeandwhohasevenusedthedetectorare

requestedtofollowalltheinstructionsforusecarefully. Ifnot,theinstrumentmaybedefective

andcorrectgasdetectionmaynotbeperformed.



４−２．Precautionsforinstallationpoints

Wheninstallingthisdetector,notethefollowingpoints.





Donotinstallthedetectorheadandcableatthefollowingpoints.

・Placetogetdirectraysofthesun.

・Placesclosedtohightemperatureand/oremissionofelectromagneticwave.

・Placewithvibrationorshocks.

・Placewherethemountingpartisweakanditiseasytocomeout.

・Placewhereitisdifficulttomakemaintenanceandinspection.

・Placeunabletosecuregrounding.

・Placeswherethetemperatureisdrasticallychanged.

・Placesexceedingoperatingtemperatureandhumidity.



４−３．Maintenancespace

Acertainmaintenancespacemustbesecuredaroundthedetectorhead,sothatthemaintenance

staffcanperformthesafeandcorrectmaintenancework.Paydueattentiontosecurethisspace

duringworkplanandexecution.

WARNING

Table of contents

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