YOKOGAWA EY200 User manual

IM EY200-JA: Japanese
IM EY200-EN: English
5th Edition: Feb. 2018 (KYOU)
この取扱説明書は，いつでも使用できるよう大切に
保管してください。
Store this manual in a safe place for future reference.
Model EY200
ディジタル接地抵抗計
Digital Earth Tester
User’s
Manual
保証書付

21
Introduction
ThankyouforpurchasingourClamp-onProcessMeter.
Thefollowingmanuals,includingthisone,areprovidedasmanuals
fortheEY200.
Readthemalongwiththismanual.
IMEY200-EN  Thismanual
IMCROHS-EY200  DocumentforChina
IMEY200-93Z2  DocumentforKorea
ContactinformationofYokogawaofficesworldwideisprovidedon
thefollowingsheet.
PIM113-01Z2 Inquiries (Listofworldwidecontacts)

22
Contents
Introduction....................................................................................................................21
1.SafetyPrecautions...............................................................................................23
2.Features......................................................................................................................26
3.Specifications...........................................................................................................27
4.Components..............................................................................................................30
5.PreparationforMeasurement....................................................................31
5-1BatteryVoltageCheck............................................................................31
5-2ConnectingTestProbes.........................................................................31
6.OperatingInstructions.....................................................................................31
6-1PrincipleofMeasurement.....................................................................31
6-2PreciseMeasurement...............................................................................32
6-3SimplifiedMeasurement........................................................................33
7.BatteryReplacement........................................................................................36
8.NotesonHousingCase&Accessories...............................................37
8-1CaseLid..............................................................................................................37
8-2HowtoFitStrapBelt..............................................................................37
9.BeforeSendingforService/Calibrationcycle............................38
10.SalesinEachCountryorRegion............................................................39

23
1. Safety Precautions
Thisproductisdesignedtobeusedbyapersonwithspecialized
knowledge.
Whenoperatingtheinstrument, besuretoobservethe
cautionarynotesgivenbelowtoensurecorrectandsafeuseofthe
instrument.If youuse theinstrumentinanywayotherthanas
instructedinthismanual,theinstrumentsprotectivemeasures
maybeimpaired.
This manualisanessentialpartoftheproduct;keepitasafe
placeforfuturereference.
YOKOGAWAisbynomeansliableforanydamageresultingfrom
useoftheinstrumentincontradictiontothesecautionarynotes.
#WARNING Indicatesa hazard thatmayresultintheloss oflifeorseriousinjuryof the userunlessthe
describedinstructionisabidedby.
#CAUTION
Indicatesahazardthatmayresult in aninjury
totheuserand/orphysicaldamage to the
productorotherequipmentunlessthe described
instructionisabidedby.
The following safety symbols are used on the instrument and in this
manual.
#Danger! Handle with Care.
Thissymbolindicatesthattheoperatormustrefertoan
explanationintheUsersManualinordertoavoidriskof
injuryordeathofpersonnelordamagetotheinstrument.
Double Insulation
Thissymbolindicatesdoubleinsulation.
Earth TERMINAL
Thissymbolindicatesground.

24
Measurement Category
#WARNING
TheinstrumentisdesignedformeasurementcategoryIII.
Donotusetheinstrumentfor measurements inlocationsfalling
thatfallundermeasurementcategoryIV.
Measurement
category
Description Remarks
O
(None,Other)
Othercircuitsthatarenot
directlyconnecttoMEAINS.
Circuitsnot
connectedtoa
mainspowersource.
CATII Formeasurementpreformedon circuitsdirectlyconnectedtothe
low-voltageinstallation.
Appliances,
portableequipment,
etc.
CATIII Formeasurementpreformedin
thebuildinginstallation. Distributionboard, circuitbreaker,etc.
CATIV Formeasurementpreformed atthesourceofthelow-voltage
installation.
Overheadwire,
cablesystems,etc.

#WARNING
•Donotusethetestleads (98074) forvoltagesexceeding33
Vrms,46VACpeakor70VDC.
•Whenmeasuring"earthvoltage",usethe2Ptestleads(98075)
andthesafetyalligatorclips(CATIII).The2Ptestleadswhen
usedtogetherwiththetestprobefallundercategoryII.
•Donotusethetestleads when thetestprobesorthesafety
alligatorclipsareloose.
Donotusethetestleadswithoutthetestprobesorthesafety
alligatorclips.

25
#WARNING
•This instrument isaearthtesterthatcanmeasureearth
resistance(earthvoltage).
Donotusethisinstrumentforotherpurpose.
•Donotusetheinstrumentifthereisaproblemwithitsphysical
appearance.
•Usethetestleadssupplied by YOKOGAWAwiththis
instrument.
•Make surethattherangeselectorswitchis set toadesired
positionbeforemakingmeasurement.
•Donotmakemeasurementinthepresenceofflammablegasses.
Otherwise,theuseofthemay cause sparkling,whichleadsto
anexplosion.
•Never attempt toconnectthetestprobeifthe instrument or
yourhandiswet.
•Donotapplyanelectricalquantityexceedingtheallowablelimit
ofameasuringrange.
•Never openthebatterycompartmentcoverwhilemaking
measurement.
•Neverattempttomakemeasurement, if anyabnormal
conditionsarenoted,suchasbroken case, crackedtestprobe
andexposedmetalparts.
•Neverturntherangeselectorswitchwithtestprobeconnected
totheequipmentundertest.
• Donotreplacebatterieswhenthesurfaceoftheinstrumentiswet.
•AlwayssettherangeswitchtotheOFFpositionbeforeopening
thebatterycompartmentcoverforbatteryreplacement.
•OnlyYokogawaservicepersonnelareauthorizedtoremove
thecasingordisassembleormodify the instrument. Do
notattempttorepairtheinstrument yourself, asdoingsois
extremelydangerous.Whentheinstrument needs aninternal
inspectionorcalibration,contactYokogawaorthedealerfrom
whomyoupurchasedtheinstrument.
#CAUTION
Theinstrumentisfordomesticuse (Class B)andmeetsthe
electromagneticcompatibilityrequirements.

26
#CAUTION
•Make surethatthetestprobesaresecurely connected tothe
terminaloftheinstrument.
•Besure to settherangeselectorswitchtothe OFF position
afteruse.
Whentheinstrumentwillnotbeinuseforalongperiodoftime,
placeitinstorageafterremovingthebatteries.
•Donotexposethe instrument tothedirectsun,extreme
temperatureandhumidityordewfall.
•Useadampclothsoakedinwateror neutral detergentfor
cleaningtheinstrument.
Donotuseabrasivesorsolvents.
•Whentheinstrumentiswet,makesureto let it drybefore
puttingitinstorage.
2. Features
ModelEY200isanearthresistance tester fortestingpower
distributionlines,in-housewiringsystem,electricalappliancesetc.
Italsohasanearthvoltagerangeforearthvoltagemeasurement.
•DesignedtosafetystandardIEC61557.
•ReferencetoIEC60529:Degrees of protectionprovidedby
enclosures(IP54).
Measurement canbemadeevenunderadverseweather
conditions.
•Large,easy-to-readLCDdigitaldisplay.
•2PTestleads(forsimplifiedmeasurement)hasastructurethat
boththeSafetyalligatorclipandtheTestprobeareavailable.
•Warnswhenearthresistanceofauxiliaryearthspikesexceeds
thepermissiblelimit.
•Convenientcarryingsoftbagforaccessoriesetc.

27
3. Specifications
Measuring Range and Accuracy (at23±5℃,RH75%orless)
Range Measuring Range Accuracy
Earthvoltage
˜V* 0to199.9V ±(1.0%rdg+4dgt)
Earth
Resistance
20Ω 0to19.99Ω
±(2.0%rdg+0.1Ω)(0to19.99Ω)
±(2.0%rdg+3dgt)(20Ωormore)
(Auxiliaryearthresistance100Ω±5%)
200Ω 0to199.9Ω
2000Ω 0to1999Ω
*˜VRange=Earthvoltage(Seriesinterferencevoltage)
EMC Standards
EN61326-1ClassB,EN61326-2-2,
EN55011ClassBGroup1
EMCRegulatoryArrangementinAustraliaandNewZealand
KoreaElectromagneticConformityStandard
( 한국 전자파적합성기준 )
RFfieldstrength=≤1V/m,totalaccuracy:specifiedaccuracy
RFfieldstrength=3V/m,totalaccuracy:specified accuracy
+5%ofrange
Safety Standards
EN61010-1,EN61010-2-030
MeasurementcategoryIII(CATIII)300V
Indooruse,Altitude2000morless,Pollutiondegree2
EN61010-031
Standards
CompliantwithEN61557-1,EN61557-5,IEC60529(IP54)
Environmental standard
EN50581
Monitoringandcontrolinstrumentsincludingindustrial
monitoringandcontrolinstruments
Measuring Method
Earthvoltagemeasurement*
Meanvalue
Earthresistancemeasurement
Constantcurrentinverter
Measuringcurrent: Approx.AC3mA(at20Ωrange)
Frequency: Approx.820Hz

28
Maximum Operating Error
Operatingerror(B)isanerrorobtainedwithin the rated
operatingconditions,andcalculatedwiththe intrinsic error
(A),whichisanerroroftheinstrumentused,andtheerror(Ei)
duetovariations.
B=±(
｜ A ｜ +1.15(E12+E22+E32+E42+E52+E72+E82))
 A :Intrinsicerror
E
1 :Variationduetochangingtheposition
E
2 :Variationduetochangingthesupplyvoltage
E
3 :Variationduetochangingthetemperature
E
4 :Variationduetoseriesinterferencevoltage
E
5 :Variationduetoresistanceoftheprobesand
auxiliaryearthelectroderesistance
E
7 :Variationduetochangingthesystemfrequency
E
8 :Variationduetochangingthesystemvoltage
Range to keep the maximum operating error
Measurementrangewithin which themaximumoperating
error(±30%)applies.
20Ωrange: 5to19.99Ω
200Ωrange: 20to199.9Ω
2000Ωrange:200to1999Ω
Battery life
Number of measurement:3300timesormore(Measure10
Ωfor5secon20Ω range andtakeapausefor25sec/using
manganesebatteries)
Operating Temperature and Humidity
0to40℃ ,relativehumidity85%orless(nocondensation)
Storage Temperature and Humidity
-20to60℃ ,relativehumidity75%orless(nocondensation)
Power Source
9VDC:Six(6)1.5Vmanganesebatteries(R6P,AA-size)or
 Six(6)1.5Valkalinebatteries(LR6,AA-size)
Overload Protection
Earthvoltageranges:300VAC(1minute)
Earthresistanceranges:280VAC(10seconds)(betweenE
andP,EandCterminals)
Insulation Resistance
5MΩormoreat500Vbetweentheelectricalcircuitandthe
housingcase

29
Dielectric Strength (Withstand Voltage)
3700V ACforoneminutebetweentheelectrical circuit and
thehousingcase
Dimensions
Approx.105(L)158(W)70(D)mm
Weight
Approx.550g(includingbatteries)
Accessories
Product Name Model No. Quantity
TestLeads
(Red20m,Yellow10m,Green5m) 98074 1set
AuxiliaryEarthSpikes 98070 2
2PTestLeads
(Red,Black/Green) 98075 1set
SoftCase 93041 1
ShoulderStrap(forEY200) 99018 1
UsersManual(Japanese/English) 1
BatteriesR6P 6
*NamePlateinEnglish(PartNo.L4058EA)

30
4. Components
<1>LCDDisplay
<2>BatteryReplacementMark(LowBattery)
<3>IndicationLEDWithMeasurement
<4>PressToTestButton(ΩMEASURE)
<5>RangeSelectorSwitch <6>MeasuringTerminals
<7>TestLeads <8>EarthSpikes
<9>2PTestLead <10>SafetyAlligatorClip
<11>TestProbe <12>Model
<13>Serialnumber <14>Nameplate

31
5. Preparation for Measurement
5-1 Battery Voltage Check
Turnon(set˜Vposition)theinstrument.Ifthe display is
clearwithoutlowbatterysymbolshowing, battery voltage
issufficient.Ifthedisplay blanks orislowbatterysymbol
indicated,replacethebatteriesaccordingto section 7for
BatteryReplacement.
Lowbatterysymbol:
5-2 Connecting Test Leads
InserttheplugoftheTestLeadssecurelyintotheterminals
oftheinstrument.
Looseconnectionmayresultininaccuratemeasurements.
<Note>
PlugcapsareattachedtoTestLeadsatshipment.
(PleaseremoveandkeepthePlugcapswhenconnecting.)
6. Operating Instructions
#WARNING
•The instrumentwillproduceamaximumvoltageof about
50VbetweenterminalsE-Cinearth resistance function.Take
enoughcautiontoavoidelectricshockhazard.
•When measuringearthvoltage,donotapplyvoltagegreater
than200Vbetweenmeasuringterminals.
•Whenmeasuringearthresistance,donotapplyvoltagebetween
measuringterminals.
#CAUTION
Toverifytheinstrument'sfunctionality,checkthatthemeasured
valueisupdateafterturningon the power.Ifthemeasured
valueisnotupdate,thereadingwillbeincorrectandmayleadto
possibleelectricalshockorpersonalinjury.
6-1 Principle of Measurement
Thisinstrumentmakes earth resistancemeasurementwith
fall-of-potentialmethod,whichisamethod to obtainearth
resistancevalueRxbyapplyingACconstantcurrentIbetween
themeasurementobjectE(earthelectrode) and C(current

32
electrode),andfindingoutthepotentialdifferenceVbetweenE
andP(potentialelectrode).
Rx=V/I

6-2 Precise Measurement (Using Test Leads)
<1> Test probe connection
Sticktheauxiliaryearthspikes P andCintotheground
deeply.Theyshouldbealignedat an intervalof5to10m
fromtheearthedequipmentundertest.
Connectthegreenwire to theearthedequipmentunder
test,theyellowwiretotheauxiliaryearthspikePandthe
redwiretotheauxiliaryearthspikeCfromterminalsE,P
andCoftheinstrumentinorder.(three-pole(wire)method)
<Note>
•Makesuretosticktheauxiliaryearthspikesinthemoist
partofthesoil.
Giveenoughwaterwherethespikeshavetobestuckinto
thedry,stonyorsandypart of theearthsothatitmay
becomemoist.
•Incaseofconcrete,laytheauxiliaryearthspikedownand
waterit,orputawet dust clothetc.onthespikewhen
makingmeasurement.

33
<2> Earth Voltage Measurement (Series interference voltage): ~V
Settherange switch toEarthvoltage(˜V)positioninthe
conditionof<1>.
Earthvoltagewill be indicatedonthedisplay.Makesure
thatthevoltageis3Vorless.
 Whenthedisplayreadsmorethan3V,itmayresultin
excessiveerrorsinearthresistancemeasurement.Toavoid
this,makemeasurementafterreducingthe voltage by
turningoffthepowersupplyoftheequipmentundertestetc.
<3> Earth resistance (Ω) Measurement: (Precise Measurement)
Settherangeswitchto2000Ωpositionandpressthe test
button(Ωmeasurement.).
LEDremainsilluminatedduringtesting. Turn therange
switchto200Ωand20Ωwhentheearthresistanceislow.
Thisindicatedvalueistheearth resistance oftheearthed
equipmentundertest.
<Note>
•Iftheauxiliary earth resistanceofauxiliaryearthspike
Cistoohightomake measurement, thedisplayreads
'...'.Rechecktheconnectionoftestleadsandtheearth
resistanceofauxiliaryearthspike.
#CAUTION
•Ifmeasurementismade with theprobestwistedorintouch
witheachother,thereadingoftheinstrumentmaybeaffected
byinduction.Whenconnectingtheprobes,makesurethatthey
areseparated.
•Ifearthresistanceofauxiliaryearthspikesistoolarge,itmay
resultininaccuratemeasurement.
MakesuretosticktheauxiliaryearthspikeP and Cinto
themoistpartoftheearthcarefully,andensure sufficient
connectionsbetweentherespectiveconnections.
6-3 Simplified Measurement (Using 2P Test Leads)
Usethismethodwhentheearthspikecannotbestuck.Inthis
method,anexistingearthelectrodewithalowearthresistance,
suchasametalwaterpipe, a commonearthofacommercial
powersupplyandanearthterminal of abuilding,canbeused
withtwo-pole(wire)method(E,P).
Usethesimplifiedmeasurement probe attached whichhasa
convenientstructurethatboththesafety alligator clipandthe
testbarareavailable.

34
<1> Wiring
Makeconnectionasshowninthefollowingfigure.
<Note>
•Whenthe2PTestLeadsarenotused,short P andC
terminals.
#WARNING
•Pleasebesuretouse a voltagedetectortocheckacommon
earthofcommercialpowersupply.
•Donotusethe instrument tocheckacommonearthof
commercialpowersupply.
Adangerwill be causedbecausethevoltagemaynotbe
displayedevenincaseofaliveconductorwhentheconnection
oftheearthelectrodetobemeasuredhascomeoff,orwhenthe
connectionofthetestleadsoftheinstrumentisnotcorrectetc.
•Donotusetheinstrumenttomeasurethevoltageofcommercial
powersupply.
Theinstrumentisnotdesignedforvoltage measurement of
commercialpowersupply.
Whenusingthe2PTestLeads,PandCterminalswillbeshort-
circuitedandtheinputimpedancewillbereduced.Theresidual
currentcircuitbreakermayoperatewhenmakingmeasurement
ofthevoltageinthecircuitwiththebreaker.

35
<2> Earth Voltage Measurement (Series interference voltage): ~V
Settherange switch toEarthvoltage(˜V)positioninthe
conditionof<1>.
Earthvoltagewill be indicatedonthedisplay.Makesure
thatthevoltageis3Vorless.
Whenthedisplayreads more than3V,itmayresultin
excessiveerrorsinearthresistancemeasurement.Toavoid
this,makemeasurementafterreducingthe voltage by
turningoffthepowersupplyof the equipmentundertest
etc.
<3> Earth resistance (Ω) Measurement: Simplified Measurement
Settherangeswitchto2000Ωpositionandpressthe test
button(Ωmeasurement.).
LEDremainsilluminatedduringtesting. Turn therange
switchto200Ωand20Ωwhentheearthresistanceislow.
Thisindicatedvalueistheearth resistance oftheearthed
equipmentundertest.
<Note>
•Iftheauxiliary earth resistanceofauxiliaryearthspike
Cistoohightomake measurement, thedisplayreads
'...'.Rechecktheconnectionoftestleadsandtheearth
resistanceofauxiliaryearthspike.
<4> Simplified Measurement Value
Two-pole(wire)methodisusedforsimplifiedmeasurement.
Inthismethod,earthresistancevaluereofearthelectrode
connectedtoterminalPisadded to trueearthresistance
valueRxandshownasanindicatedvalueRe.
Re=Rx+re
Ifthereisknownbeforehand,trueearthresistancevalue
Rxiscalculatedasfollows.
Rx=Re-re

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7. Battery Replacement
#WARNING
•Never attempt toopenthebatterycompartmentcover,ifthe
outersurfaceoftheinstrumentiswet.
•Neverattempttoreplacebatterieswhilemakingmeasurement.
Toavoidshockhazard,turntheinstrumentoffanddisconnect
thetestleadsandtheprobes from theinstrumentbefore
openingthebatterycompartmentcover.
#CAUTION
•Donotmixnewandoldbatteries.
•Installbatteriesintheorientationasshowninside the battery
compartment,observingcorrectpolarity.
Six(6)1.5Vmanganesebatteries(R6P,AA-size)or
Six(6)1.5Valkalinebatteries(LR6,AA-size)
<Replacement procedure>
<1>Turnoffthe instrument anddisconnecttheTestLeads
fromtheterminals.
<2>Loosentwoscrewsonthebottomoftheinstrumentand
removethebatterycover.
<3>Alwaysreplaceallsixbatteriesincorrectpolarity.
<4>Putthecoverbackinplaceandtightenthetwoscrews.

37
8. Notes on Housing Case & Accessories
8-1 Case Lid
Caselidcan be fitunderthehousingcasewhilemaking
measurement.
8-2 How to Fit Strap Belt
The instrument isequippedwithaShoulderstrapto
suspendfromtheneckto allow bothhandstobeused
freelyforeasyandsafeoperation.

38
9. Before Sending for Service / Calibration cycle
Iftheinstrumentdoesnotoperatenormally,pleasecontactnearby
Yokogawasalesoffice.
Beforereturningtheinstrumentfollowthetrouble-shootingguide
shownbelow.
If the instrument does not turn on;
Check whetherbatteriesaremissingorthey are installed
incorrectpolarity.
(Fordetailsofbattery,see7.BatteryReplacement)
Notethatbatteries were not installedintheinstrumentat
shipment.
If the display reads1 . . . in earth voltage measurement;
Avoltageexceeding200Visbeingappliedtotheinstrument.
Haltthe measurement immediately,otherwisetheinstrument
maybedamaged.
#WARNING
•When measuringearthvoltage,donotapplyvoltagegreater
than200Vbetweenmeasuringterminals.
If the display reads. . .in precise earth resistance measurement;
Sticktheauxiliaryearthspikesdeeperintotheearth, or stick
thematotherlocations;orAddmoisturetothepartoftheearth
whereCauxiliaryearthspikeisstuck(connectedwiththered
wire);andShortthethreetest leads andcheckifthedisplay
indicatesavaluenear0.00.
(Fordetailsofmeasuring,see6-2PreciseMeasurement)
If the display reads. . . in simplified earth resistance measurement;
Checkiftheconnectiontoametalwaterpipes,acommonearth
ofcommercialpowersupply,etc.,issecure;or
Useanothermetalwaterpipe,common earth of commercial
powersupply,etc.
(Fordetailsofmeasuring,see6-3SimplifiedMeasurement)
Calibration cycle
Itisrecommendedthatthetesterbecalibratedonceeveryyear
forcorrectoperation.

39
10. Sales in Each Country or Region
Disposing the Product
Waste Electrical and Electronic Equipment (WEEE), Directive
(ThisdirectiveisvalidonlyintheEU.)
ThisproductcomplieswiththeWEEEdirectivemarkingrequirement.
Thismarkingindicatesthatyoumust not discardthiselectrical/
electronicproductindomestichouseholdwaste.
Product Category
Withreferencetotheequipmenttypes in theWEEEdirective,this
productisclassifiedasaMonitoringandControlinstruments
product.
WhendisposingproductsintheEU, contact yourlocalYokogawa
EuropeB.V.office.
Donotdisposeindomestichouseholdwaste.