Riken Keiki NC-591W Instruction Manual

PT1E-0963
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•RequestfortheCustomers
•Readandunderstandthisoperatingmanualbeforeusingthedetector.
•Youmustoperatethedetectorinaccordancewiththeoperatingmanual.
•Regardlessofwarrantyperiod,weshallnotmakeanycompensationforaccidentsanddamage
causedbyusingthisproduct.
Thecompensation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youfindabnormalitiesinthedetector,pleasenotifythemtoourlocalrepresentative
immediately.
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OPERATINGINSTRUCTIONMANUAL
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FOR
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INDICATOR/ALARMUNITNC-591W

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INDEX
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１．PRODUCTOUTLINE
１−１． Inthebeginning ・・・・・・・・・・・・・・・・・・・・・・・ ３
１−２． Applicationforuse・・・・・・・・・・・・・・・・・・・・・・・・ ３
１−３． Identificationofeachcautionalmarks ・・・・・・・・・・・・ ３
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２．IMPORTANTINSTRUCTIONFORTHESAFETY
２−１． Dangeritems ・・・・・・・・・・・・・・・・・・・・・・・・・・・ ４
２−２． Warningitems・・・・・・・・・・・・・・・・・・・・・・・・・・・ ４
２−３． Cautionitems・・・・・・・・・・・・・・・・・・・・・・・・・・・ ５
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３．PRODUCTFUNCTION
３−１． Externaldrawing ・・・・・・・・・・・・・・・・・・・・・・・・・・ ６
３−２． Appearance ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ６
３−３． Panelcut-outdimensions・・・・・・・・・・・・・・・・・・・・・・・７
３−４． Nameofeachpartandfunction・・・・・・・・・・・・・・・・・・・ ８
３−５． Blockdiagram・・・・・・・・・・・・・・・・・・・・・・・・・・・ ９
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４．HOWTOUSE
４−１． Beforeoperation・・・・・・・・・・・・・・・・・・・・・・・・・・ １０
４−２． Mounting/detachingtheunit・・・・・・・・・・・・・・・・・・・・ １０
４−２−１． Mountingtheunit・・・・・・・・・・・・・・・・・・・・・・ １０
４−２−２． Detachingtheunit・・・・・・・・・・・・・・・・・・・・ １０
４−３． Installationplace・・・・・・・・・・・・・・・・・・・・・・・・・ １１
４−４． Cautioninthesystemengineering・・・・・・・・・・・・・・・・・ １２
４−４−１． Stablepowerused・・・・・・・・・・・・・・・・・・・・・ １２
４−４−２． Designingtoconsiderradiation・・・・・・・・・・・・・・ １２
４−４−３． Lightningmeasures・・・・・・・・・・・・・・・・・・・・・ １２
４−４−４． Alarmcontact・・・・・・・・・・・・・・・・・・・・・・・ １３
４−５． Grounding・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １５
４−６． Wiring・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １６
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５．OPERATIONMETHOD
５−１． Startup・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １７
５−２． Basicperformanceflow・・・・・・・・・・・・・・・・・・・・・・・ １７
５−３． Startupmethod
５−３−１． Poweron・・・・・・・・・・・・・・・・・・・・・・・・・ １８
５−４． Explanationofperformance(Detectionmode)
５−４−１． Displayaction・・・・・・・・・・・・・・・・・・・・・・ １９
５−４−２． Externaloutputaction・・・・・・・・・・・・・・・・・・ ２１
５−５． Maintenanceandadjustment
５−５−１． Maintenancemode ・・・・・・・・・・・・・・・・・・・ ２２
５−５−２． Zeroadjustment ・・・・・・・・・・・・・・・・・・・ ２３
５−５−３． Confirmationofalarmlevel・・・・・・・・・・・・・・・ ２４
５−５−４． Changeofalarmlevel・・・・・・・・・・・・・・・・・・ ２４
５−５−５． Confirmationofaddress・・・・・・・・・・・・・・・・・ ２５
５−５−６． Confirmationofpeakholdlevel・・・・・・・・・・・・・ ２５
５−５−７． Alarmtest ・・・・・・・・・・・・・・・・・・・・・・・ ２６
５−６． Howtofinishoperation・・・・・・・・・・・・・・・・・・・・・・ ２７

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６．KINDOFALARMANDPERFORMANCE
６−１． Kindofalarm・・・・・・・・・・・・・・・・・・・・・・・・・・・ ２８
６−２． Gasalarm
６−２−１． Gasalarmaction・・・・・・・・・・・・・・・・・・・・・ ２８
６−２−２． Respondingtogasalarm・・・・・・・・・・・・・・・・・・ ２９
６−２−３． Alarmotherthangasleakage・・・・・・・・・・・・・・・ ２９
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７．MAINTENANCECHECK
７−１． Frequencyofmaintenanceandcheckitems
７−１−１． Dailycheck・・・・・・・・・・・・・・・・・・・・・・・・ ３０
７−１−２． Regularmaintenancecheck・・・・・・・・・・・・・・・・・ ３０
７−２． Maintenancecontractforregularcheck・・・・・・・・・・・・・・ ３０
７−３． Replacementofsensorandparts ・・・・・・・・・・・・・・・・ ３１
７−４． Treatmentwhenoperationisstoppedoritsinstallationplaceismoved.
７−４−１． Stoppingthenormaloperation・・・・・・・・・・・・・・・ ３１
７−４−２． Installationwhenmoveitsplace・・・・・・・・・・・・・・ ３１
７−５． Storageortreatmentwhentheunitisnotinuseforalongtime
・・・・・・・・・・・ ３１
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８．SCRAPOFPRODUCTSANDSENSORS・・・・・・・・・・・・・・・・・・・・・・・ ３１
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９．TREATMENTATABNORMALCASE
９−１． Troublealarm・・・・・・・・・・・・・・・・・・・・・・・・・・・ ３２
９−２． Counteractionattroublealarm ・・・・・・・・・・・・・・・・ ３２
９−３． Beforeitisthoughttobetrouble ・・・・・・・・・・・・・・・・ ３２
９−４． Troubleshooting ・・・・・・・・・・・・・・・・・・・・・・・ ３２
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１０．DEFINITIONOFTERMS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ３４
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１１．PRODUCTSPECIFICATIONS
１１−１． Specifications・・・・・・・・・・・・・・・・・・・・・・・・・ ３５
１１−２． Productcompositions・・・・・・・・・・・・・・・・・・・・・・ ３６
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１．PRODUCTOUTLINE
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１−１．Inthebeginning 
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Firstofall,wewishtoexpressourheartfeltthanksforyourpurchaseofourindicator/alarmunitNC-591W.
Thisinstructionmanualisjustaguidebooktooperateindicator/alarmunitNC-591WofRM-590series.
Yourkindreadingofthismanualisrequestednotonlyforfirstuserbutforalreadyexperiencedstaff.
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１−２．Applicationforuse
○Thisisanexclusiveindicator/alarmunittobeusedincombination with our new ceramic sensor type
combustiblegasdetectorhead..
○Combustiblegasleakedintoambientairisdetectedwithcombustiblegasdetectorheadwhichisconnected
withthisindicator/alarmunit..
Detectionresults(Gasconcentrations)aredisplayedwith4-digitLEDindicatorandoutputs4-20mADCinppm
rangeandfixed22mADCforLELrangeasgasconcentrationsignal.
○Thisunitprovidedualdetectionrangesuchasppmrangeand%LELrange.
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１−３．Identificationofeachcautionalmarks
Indicatesanimminentlyhazardoussituationwhich,ifnotavoided,willresultindeathor
seriousinjury.Thissignalwordistobelimitedtothemostextremesituation.
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Indicatesapotentiallyhazardoussituationwhich,ifnotavoided,couldresultindeath
orseriousinjury.
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Indicatesapotentiallyhazardoussituationwhich,ifnotavoided,mayresultinminoror
moderateinjury. Itmayalsobeusedtoalertagainstunsafepractices.
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Thismeans“ADVICE”atoperation.
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＊NOTE
DANGER
WARNING
CAUTION

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２．IMPORTANTINSTRUCTIONFORTHESAFETY
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２−１．Dangeritems
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２−２．Warningitems
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Thisisnotaexplosionproofunit. Donotuseitathazardousarea.Operationundersuchenvironmentisvery
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DANGER
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・Detectorhead
Donotconnectotherdetectorheadthandesignatedcombustiblegasdetectorhead.
Ifconnected,youcannotdetectgas.Furthermore,thisunitorotherconnectedunitmaybebroken.
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・Powersource
Beforesupplyingthepower,confirmthatthepowersourceisadesignatedvoltage.
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・Necessityofprotectivegrounding
Donotcutinsideoroutsidewireforearth,nordisconnectthewirefromearthterminal.
Inanycase,theunitbecomesdangerousconditions.
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・Defectofprotectivefunction
Donotoperatetheunitifprotectivefunctionssuchasprotectivegroundingorfuseareseemstobedefective.
Also,beforeoperatingtheunitconfirmthatthereisnodefectforprotectivefunctions.
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・Fuse
Usethedesignatedrating(current,voltage,type)fusetopreventfire.
Replacementoffuseshallbedoneafterputofftheinitialpowersourceandputoffthepowerswitchofthisunit.
Donotuseotherfusethandesignatedone,normakeshortcircuitforfuseholder.
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・Externalconnections
Aftermakingprotectivegroundingfirmly,connecttoexternalcontrolcircuitordetectionobjective.
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・Respondingtogasalarm
Whendetecthighconcentrationgasthanpresetalarmlevel,itisverydangerous.
Itisrequiredtotakeanappropriatemeasuresbycustomerʼsdecision.
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・Operationingaseousatmosphere
Donotoperatethisunitinanatmospherewherecombustible/explosivegasesorvaporsmayexistsince
thisisanon-explosionproofunit.
WARNING

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２−３．Cautionitems 
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・Donotusewalky-talkynearthisunit.
Whenthisunitreceivestheelectricwavesbywalky-talkyetcnearfromthecable,thiswilleffectthereading.
Whenusethewalky-talky,operateitattheplacewherethereisnoinfluenceofelectricwaveejection.
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・Whenmakepoweronagain,makeitafteranintervalofover5seconds.
Whenmakepoweronwithin5seconds,theremaybenonormaloperation.
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・Whenoperateitnottofollowthismanual,repairitbyotherratingpartsormodifyitonhisown,thesafety
andqualityofproductscannotbesecured.Then,whenanaccidenttakeplacebyit,wecannotassureour
responsibilityonthem.
Takeenoughconsiderationforinstrumentationtokeepsafetyevenifdisconnectionofpowerandsignal
lines,defectofoperationortroublewouldbehappenduetounexpectedreason.
Thisisanelectricalappliedinstrument.
Becareitmaybeeffectedbypowernoise,electrostaticandelectromagneticnoise.
Whenuseundersuchconditions,makeprotectivetreatmentforuse.
CAUTION

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３−３．Panelcut-outdimensions
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※Refertotheinstructionmanualformulti-unitcaseifinstalledtheunittomulti-unitcase.
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CAUTION
Pleaseconsultusorwithouragentforinstallationmethodorinstallationquantitytoavoid
troublecausedbyradiatingheat.
Dimensionswithsinglecase
1.Mountingfor2stepsinverticalandNlinesinhorizontal
2.Mountingfor1stepinverticalandNlinesinhorizontal
138+1
0
66+0.6
0
Requiredthicknessofthepanel:1.2〜3.2mm
（３６×N−３）＋０．６
０
（３６×N−３）＋０．６
０

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8
３−４．Nameofeachpartandfunction
*Thebelowpicturesshowindicator/alarmunitwithsinglecase. 
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①LEDdisplay・・・・・・・・・・・・・・・・・・・・Indicatesgasconcentration.
②POWERswitch・・・・・・・・・・・・・・・・・ON/OFFswitch
③Terminalplates・・・・・・・・・・・・・・・・・Connectscablesfromoutside(incaseofsinglecase).
 Formulti-unitcaserefertoinstructionmanualformulti-unitcase.
④PW/TRlight・・・・・・・・・・・・・・・・・・・Combinationlightforpowerandtroubleindication.
 Steadylight:PowerON,normaloperation
 Flashing:Trouble
⑤AL1light・・・・・・・・・・・・・・・・・・・・・・Flashesatgasalarm(1stalarm)andchangestosteadylightafter
resetoperation.
⑥AL2light・・・・・・・・・・・・・・・・・・・・・・Flashesatgasalarm(2ndalarm)andchangestosteadylightafter
resetoperation.
⑦SKIPlight・・・・・・・・・・・・・・・・・・・・・Flashesduringmaintenancemode.
⑧MODEswitch・・・・・・・・・・・・・・・・・・Usesatmaintenancework.
⑨UP/DOWNswitch・・・・・・・・・・・・・・ Usestoselectitemsatmaintenancemode,increaseordecrease
readingatzeroandspanadjustments,andtoincreaseordecrease
readingatalarmtest.
⑩SETswitch ・・・・・・・・・・Usestochangeforalarmtestmode.
Also,thisisusedtosetthemodeduringmaintenancemode.
⑪HEATcontrolknob・・・・・・Usestoadjusttheheatervoltageofthesensor.
⑫ppmlight ・・・・・・・・・・Turnsonwhendetectingppmrange.
⑬LELlight ・・・・・・・・・・TurnsonwhendetectingLELrange.
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②
④
⑤
⑥
⑦
⑧
⑨
⑩
⑪
①
⑬
⑫
③

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9
３−５．Blockdiagram
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Amplifierpart
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Control
part
Displaypart
（ＰＷ／ＴＲ）(ＳＫＩＰ)（ＡＬ１） （ＡＬ２）
Operationpart
（ＭＯＤＥ） （ＵＰ） （ＤＯＷＮ） （ＳＥＴ）
POWERINPUT
(DC24V)
Powersupplypart
Gasalarmcontact （ＡＬ１、ＡＬ２）
Troublealarm（ＴＲＯＵＢＬＥ）
※Standardsetting
・De-energized
（De-energizedatnormal）
・N.O.contact
（Contactclosesatalarm）
Alarmcontactcontrolpart
４−２０ｍＡ
transmission
Transmissionpart
Detectorhead
（sensor）
ＮＣ−５９１W

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10
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４．HOWTOUSE
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４−１．Beforeoperation
Besuretokeepcautionalitemsofusenotonlyforfirstuserbutforalreadyexperiencedstaff.
Ifnotkeepthesecautionalitems,theunitmaybedefectiveandcorrectgasdetectionmaynotbeperformed.
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４−２．Mounting/detachingtheunit
Indicator/alarmunitforRM-590seriesshallbeusedafterhousingitineitherexclusivesinglecaseormulti-unitcase.
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４−２−１．Mountingtheunit
  ・Openthefrontcoverofthisunit.
  ・ConfirmthatthepowerswitchisatOFF.
  ・Withthedisengagementleveratdownposition,mountintothecase.
   （Confirmthattheedgeconnectorisputinfirmly）
  ・Confirmthatthedisengagementleveristurnedupwardwhenindicator/alarmunitismountedintothecasefirmly.
  ・Afterconfirmationofleverposition,putONthepowerswitch,andthen,closethecover.
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４−２−２．Detachingtheunit
  ・Openthefrontcoverofthisunit.
  ・ConfirmthatthepowerswitchisatOFF.
  ・Pushdisengagementleverdowntoreleasethelock.
  ・Pullouttheunitfromthecase.
  ・Turntheleverupwardandclosethecover.
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Mounting/detachingofindicator/alarmunitshallbedoneaccordingtothe
aboveprocedures.Ifnot,stoppingmetaloftheunitmaybetransformed
andthecovercannotbeclosed.
Especially, if the unit would be mounted into the case while the
disengagementleverispositionedupward(Lockedcondition),thelevermay
betransformed.
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 CAUTION

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11
４−３．Installationplace
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  Keepawaythesystemfromdirectsundroughtorwherethetemperatureofthesystemis
drasticallychanged.
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Thesystemconsistsoffineelectronicsparts.
Installthemwheretobestablenottocrushorfalldown.
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  Keepthesystemfromtheequipmentwhichmaygiveahighfrequencyinthesurroundingsand
installit.
・Donotputthesystemjointlyeach. ・Donotwirethecableinparallelnortakeaccess.
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Donotinstallandmakegasdetectionattheplacewherethesamplegasisdeposited.
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Thisunitisrequiredtomakemaintenanceregularly.
Then,donotinstallattheplacewherethereisdangeratmaintenancetime.
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Whenrequiredtostopthesystematmaintenancetime,unabletomaintainifnotremoveapartofsystem
orunabletodetachthecaseduetothepipeorracketc.donotinstallsuchplace.
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Besuretogroundwheninstall.
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Donotinstallatplaceswheredirectsundroughtorwherethetemperatureisdrasticallychanged.
Donotinstallitwherevibrationorshocksmaytakeplace.
Keepthesystemfromtheequipmentwhichmaygeneratethenoise(Unit&cable).
Donotinstallitwherethedetectiongasisdepositedaround.
Donotinstallattheplacewhereitisdangerformaintenanceservicesuchashighvoltage
cable,etc.
Donotinstallitwhereitisunabletomakemaintenance.
Systemhousingthatgroundingconstructionisnotenough.
CAUTION

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12
４−４．Cautioninthesystemengineering
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Unstablepowerandnoisemaycauseerrorofperformanceandalarm.
Forthesystemtousethisunit,itisrequiredtomakedesignbasedonthismanual
descriptions.
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４−４−１．Stablepowerused
Whilethesystemgetsstableatpoweronorpowerfailure,theexternaloutputandalarmcontactmaybeonand
thecareforitmustbetaken.Insuchcase,usethestandbybatteryortakeanappropriateactioninthe
receiverside.
Supplythefollowingpowertothisunit.
Powervoltage DC２４V±１０％
Powerfailure
tolerancetime
Approx50msec.
（Forpowerfailureof50msec,itre-starts）
Towarrantthecontinuousoperation,installthestandbybattery
outside.
Others
Donotcontactwithpowerinvolvinghighpowerloadandhigh
frequencynoise.
Accordingtorequirement,uselinefilterandseparateitfrom
noisesource.
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４−４−２．Designingtoconsiderradiation
Wheninstalltheunitintotheclosedself-standingcontrolpanel,mountthefansintheupperandlowerpart.
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４−４−３．Lightningmeasures
Lightningsurge
Thereistheproblem“Lightning”. Whenmakeoutdoorwiringofcableatfactoryorplantsetcor
whenmakeaparallelwiringinthesameductwiththecableinfromoutdoorevenattheindoor
wiring.Ifthelightningisahugegenerationsource,thecableisareceptionantennaandthereis
thecasethatcableconnectinginstrumentisbroken. Itisimpossibletopreventthegenerationof
lightning.Ifthecableshouldputinmetaltubeorlaidintheunderground,itisimpossibletoprevent
theinductivelightningsurgegeneratingfromthethunder.
Lightning
measures
Thereisnotthecompletecountermeasureforitbutthefollowingmethodcanbeconsidered.
Makethesuitabletreatmentaccordingly.
a) Thetransmissionsignalrouteisarrangedforconnectionbytheopticalfibercableetc.
b) Countermeasurebythelightingarrester(Cablesafetyretainer).Thereisthewaytoinstall
the lightning arrester just before the field apparatus and the central control station.  The
positionofthelightningarresterinstallationisateachpointofcablelaidoutfromtheoutdoor
totheindoor.Thelightningarresterbuildsinthecircuittoremovethesurgevoltagetobethe
sourceforthedamageoffieldapparatus(Protectionresistor,zerodiodeetc.)andisdesigned
toprotecttheapparatus.Butasthesignalmaybeattenuatedduetothelightningarrester,
checktheactionanditisrequiredtouse.
Grounding Surgenoiseshallbegeneratedfromthethunderlightningorexceptit.
Toprotectdetectorfromthesecause,besuretomakegrounding.
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＊Inthelightningrod,thereisthecircuittoremovethesurgevoltagetobeacauseofdamagefromfieldinstruments.
Byinstallingthelightningrod,thesignalmaybeattenuated. Wheninstallthelightningrod,itisrequiredtocheck
theperformanceinadvance.
CAUTION

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13

４−４−４．Alarmcontact
・Alarm contacts shall be used onlyforexternalbuzzerandalarmlight,anddonotuseitforthe
controllinguse(suchassolenoidvalvecontroletc).
Whencontroltheexternalload,thebadinfluencemaybegiventothesystemaccordingtotheloadcharacteristics.
Insuchcase,thefollowingcountermeasureshallbetakentostabilizetheactionandprotectthecontents.
・Relay(makecontactamplification)bythelowvoltagerelayandoperatebyconnectingCRcircuit(SparkKiller:SK)
(DiodeetcforDC)suitedforrelaycoildirectlytorelay.
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 ・AddCRcircuittotheloadsideofrelayontherequest.
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CAUTION
 （FORUSEOFNORMALY-CLOSEDCONTACT） 
Normally-closedcontact(Breakcontact)atde-energizedconditionmaychangetoopencontactina
momentduetophysicalshock.
Wheneveralarmsignalsfromgasdetectorsareusedwithnormally-closedcontact,pleaseput
delayed-circuit(foraboutonesecond)toreceiversideofnormally-closedcontacttoavoid
suchphenomenon.

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14
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Reference:Bytheconditionofload,CRcircuitmaybebettertoinstallinthecontactsidebutitisrequired
toputinbycheckingtheactionofload.
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ＳＫ:Surgeabsorptionfilter
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−Howtothinkalarmcontactsagainstinductiveload−
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ThespecforalarmcontactofNC-591Wisdescribedbytheconditionsofresistiveload.
Whenusetheinductiveloadforalarmcontacts,theveryhighreverseelectromotive
voltagemaybegeneratedandthefollowingtroubletendstobeproduced.)
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・Contactpartofrelayismeltedadhesivelyandthecontactscannowork.
・Highvoltageisputinsideofindicator/alarmunitandthen,electricalpartsmaybedamaged.
・Asitisbignoise,thetroubleactionmaybetakenbytherecklessdriveofCPU.
・Unforeseeablenoisemaybreakintothecontactregardlessofinductiveloadandtheabovetroubletendstobe
produced.
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※Astheinductiveload,therearefollowingsamples.
・Revolvinglight*Externalrelay*Buzzer*Siren*Fan*Fluorescentlamp *Motoretc.
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CAUTION 
・Theinductiveloadshallnotbeusedinprinciple(Donotusefluorescentlamp).
・Whenusetheinductiveload,makethecontactamplificationoutside,buttheoutside
relaycoilbelongstotheinductiveload,usetherelaydrivenbythelowvoltage(within
AC100V)anditisprotectedbyanappropriatesurgekiller.
・Whencontrolthelightinductiveloaddirectly,protectthecontactsbyanappropriatesurge
killerbyallmeans.
Ｖ
SK
L
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o
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a
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d
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Ｖ
SK
C
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o
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i
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l
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PowersupplyPowersupply Relayedrelay
(Lowvoltagerelay)
Alarmcontact
ＮＣ−５９１W

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15
４−５．Grounding
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Makegroundingwithterminal
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BesuretomakegroundingbeforeputtingpowerON..
*Theabovefigshowstheunitwithsinglecase. Incaseofmulti-unitcase,refertoinstruction
manualformulti-unitcase.
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 Besuretomakegroundingforsafetypurposeandtokeepstableoperationofthisunit.
 Donotconnecteachwirewithgaspipe.MakegroundingcorrespondingtoD-classgrounding
(Groundingresistance:below100ohms).
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WARNING
Terminal

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16
４−６．Wiring
（Incaseofsinglecase）
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ＴＤ１
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ＴＤ２
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ＴＤ３
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ＴＤ４
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Maximumcablelength：1.25km
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Formulti-unitcase,refertooperatinginstructionformulti-unitcase.
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①
②
③
④
①
②
③
④
③
④
⑤
⑥
DC24V±10％
ＣＶＶ １．２５mm2-４ｃore
①
②
③
④
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①
②
③
④
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AL1 1stalarmcontactoutput
AL2 2ndalarmcontactoutput
TRTroublealarmcontact
４-20mAoutput
GND(-)
Earthterminal
Detector
head
24(+)
 CAUTION

・UseCVV1.25mm2cableforconnectionofdetectorhead.
・Donotdistributepowercable,detectorheadcableandsignalcabletogetherwithpowerlineformotor,etc.
・Thisunitappliesaconnectortypeterminalplateforeasywiring（forsinglecase）.Becarenottogiveahigh
loadtotheconnector.
・Wecannotwarranttheperformanceofthisunitifundesignatedcableisused.
3
4
5
6
(+)
(
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17

５．OPERATIONMETHOD
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５−１．Startup
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BeforeputtingpowerON……………
BeforeputtingpowerON,keepfollowingcautionitems.Ifnot,dangerforelectricshockordamagetothe
unitwillbehappen.
（１）Makegrounding.
（２）Checkthatwiringswithouterunitsaremadecorrectly.
（３）Checkthatthesupplyvoltageiswithinarating.
（４）Relaycontactforouteralarmmayworkduringadjustments.Evenrelaycontactworks,treatthat
anyinfluencewillnotbegiventotheouter.
（５）Topreventfire,checkthatthedesignatedfuseisused.
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５−２． Basicperformanceflow 
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Poweron
Standby
Initialclear(approx.25sec.)
Detectionmode Alarmtestmode
ＳＥＴ switch
(Pressforabout3sec.)
ＭＯＤＥswitch(Pressforabout3sec.）
Maintenancemode
・Zeroadjustment
・Changeofalarmlevels（ＡＬ１,ＡＬ２）
・Confirmationofpeakholdlevel.
・Displayofheatercurrenttothesensor.
・Spanadjustment.
CAUTION
Maintenancemodeshallbeperformedbythespecializedserviceman.
Donotoperateitwithoutpermission.

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18
５−３．Start-upmethod
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５−３−１．Poweron
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1)Beforemakingpoweron,checkthattheunitisconnectedcorrectly.
2)Thepowerswitchcanbeseenwhenthefrontcoverisopened.
3)PutthepowerswitchupwardtoONanddownwardtoOFF.
4)Putthepowerswitchon,andpowerlightilluminates.
5)Statusofinitialclear(about25sec.)isdisplayedas“----“.
 ・Checkingofthesystem(Self-diagnosis)
 ・Outputsignal:Approx2.5mA
・Gasalarm,troublealarm(light,contact)shut-off.
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Powerswitch
Cover

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19
５−４．Explanationofperformance(Detectionmode)
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５−４−１．Displayaction
Therearefollowingtwokindsofdisplays.

(1)LEDdisplay：Showsgasconcentrations.
 (2)LEDlight ：Showspower/trouble(PW/TR),1stgasalarm(AL1),2ndgasalarm(AL2)andmaintenance
(SKIP)condition.
*ContentsofindicationsbyLEDdisplayandLEDlightaredifferentfromtheconditionoftheunit.
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Preparation
PowerON
ActionofLEDlight
□：Lightoff  ■：Lighton  ◎：Flashing
Initialclear(Approx25sec.)
Detectionmode
Only PW/TR light illuminates at detection
mode and LED display shows detected gas
concentration.
Gasalarmcondition
WhendetectgasaboveAL1,AL2,it
showsgasconcentrationsandAL1,
AL2alarmlightsflash.
PW/TR  AL2
■□
SKIP  AL1
□□
PW/TR  AL2
■□
SKIP  AL1
□□
PW/TR  AL2
■□
SKIP  AL1
□◎