Kyoritsu KEW 4106 Manual

Kyoritsu Måleudstyr KEW 4106

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InstructionManual

EarthResistance/EarthResistivityTester

KEW 4106

Contents

1.SafetyWarnings...............................................................................................1

2.HowtostoretheCover....................................................................................5

 2-1MethodofremovingtheCover...............................................................5

 2-2MethodofstoringtheCover...................................................................5

3. Features.............................................................................................................6

4. Specifications...................................................................................................7

5. InstrumentLayout.......................................................................................... 10

6. MarksandmessagesontheLCD.............................................................. 14

7. MeasurementPrinciple................................................................................. 15

 7-1PrincipleofEarthResistanceMeasurements................................... 15

 7-2PrincipleofEarthResistivity(ρ)Measurements.............................. 15

8. PreparationforMeasurement....................................................................... 16

 8-1BatteryVoltageCheck........................................................................... 16

 8-2Settings................................................................................................... 16

 8-2-1SettingItems................................................................................... 16

 8-2-2SettingforMeasurementMethod................................................ 17

 8-2-3SettingforMeasurementFrequency............................................ 17

 8-2-4Site(location)No.Setting............................................................ 18

 8-2-5SettingfortheintervalbetweenAuxiliaryEarthSpikes

 atEarthResistivity(ρ)Measurements....................................... 19

 8-2-6DateandTimeSetting.................................................................... 19

 8-2-7Settingfortheresidualresistance(Rk)ontheTestLeads..... 22

 8-3Backlight................................................................................................. 23

 8-4Auto-Power-Off....................................................................................... 23

 8-5SeriesInterferenceVoltage(EarthVoltage)Measurement............. 24

 8-6AuxiliaryEarthResistanceMeasurement.......................................... 24

 8-7ConnectionofEarthTestLeadsandSimplified

 MeasurementProbes............................................................................. 24

1.SafetyWarnings

This instrument has been designed, manufactured and tested according to

IEC 61010: Safety requirements for Electronic Measuring apparatus, and

deliveredinthebestconditionafterpassingqualitycontroltests.

This instruction manual contains warnings and safety rules which have to

be observedby the user to ensure safe operationof the instrument and

to maintain it in safe condition. Therefore, read through these operating

instructionsbeforeusingtheinstrument.

#WARNING

●Readthroughandunderstandtheinstructionscontainedinthismanual

beforeusingtheinstrument.

●Keep themanualathandto enablequick reference whenever

necessary.

●Theinstrumentistobeusedonlyinitsintendedapplications.

●Understand and followallthesafetyinstructions contained in the

manual.

Failure to follow the instructions may cause injury, instrument damage

and/or damage to equipment under test. Kyoritsu is by no means liable

for any damage resulting from the instrument in contradiction to this

cautionarynote.

○The symbol # indicatedontheinstrument,means thattheuser

must refer to the related parts in the manual for safe operation of the

instrument.

○Readtheinstructionsfollowingcarefullyeach#symbolinthemanual.

#DANGER:is reserved for conditions and actions that are likely to

causeseriousorfatalinjury.

#WARNING:is reserved for conditions and actions that can cause

seriousorfatalinjury.

#CAUTION:is reserved for conditions and actions that can cause

injuryorinstrumentdamage.

#DANGER

●Never make measurement on a circuit in which electrical potentials

exceedingAC/DC300Vexist.

●Do not attempt to make measurement in the presence of flammable

gasses. Otherwise, the use of the instrument may cause sparking,

whichcanleadtoanexplosion.

●Never attempttousethe instrument ifitssurface or your handare

wet.

●Becarefulnottoshort-circuitthepowerlinewiththemetalpartofthe

testleadswhenmeasuringavoltage.Itmaycausepersonalinjury.

●Donotexceedthemaximumallowableinputofanymeasuringrange.

●DonotpresstheTestButtonbeforeconnectingtheTestLeads.

●NeveropentheBatterycoverduringameasurement.

●The instrument should be used only in its intended applications or

conditions. Otherwise, safety functions equipped with the instrument

donotwork,andinstrumentdamageorseriouspersonalinjurymaybe

caused.

#WARNING

●Never attempt to make any measurement if any abnormal conditions,

such as a broken cover or exposed metal parts are present on the

InstrumentandTestLeads.

●DonotrotatetheRangeSwitchwiththeTestLeadsconnectedtothe

equipmentundertest.

●Do not install substitute parts or make any modification to the

instrument.

Return the instrument to your local KEW distributor for repair or

re-calibrationincaseofsuspectedfaultyoperation.

●Donotreplacebatteriesiftheinstrumentiswet.

●Ensurethatthetestleadsarefirmlyinsertedintotheterminal.

●SettheRangeswitchtoOFFpositionwhenopeningtheBatterycover

forbatteryreplacement.

●Stopusingthetestleadiftheouterjacketisdamagedandtheinner

metalorcolorjacketisexposed.

Symbols



Instrumentwithdoubleorreinforcedinsulation

Usermustrefertotheexplanationsintheinstructionmanual.



Earth

This instrument satisfies the marking requirement defined in the

WEEE Directive (2002/96/EC). This symbol indicates separate

collectionforelectricalandelectronicequipment.

Measurementcategories(Over-voltagecategories)

Toensuresafeoperationofmeasuringinstruments,IEC61010establishes

safety standards for various electrical environments, categorized as O to

CATIV,andcalledmeasurementcategories.

Higher-numbered categories correspond to electrical environments with

greatermomentaryenergy,soameasuringinstrumentdesignedforCATIII

environments can endure greater momentary energy than one designed for

CATII.

O :Circuitswhicharenotdirectlyconnectedtothemainspower

supply.

CATII :Primary electrical circuits of equipment connected to an AC

electricaloutletbyapowercord.

CATIII :Primaryelectricalcircuitsoftheequipmentconnecteddirectly

to the distribution panel, and feeders from the distribution

paneltooutlets.

CATIV :Thecircuitfromtheservicedroptotheserviceentrance,and

tothepowermeterandprimary overcurrentprotectiondevice

(distributionpanel).

O: Device which is

not directly

connected to the

mains power supply

2.HowtostoretheCover

This instrument has a dedicated Cover to protect against impacts from

theoutsideandprevent the instrumentbody from becoming dirty.The

Cover can be detached and put on the backside of the main body during

measurements.

2-1MethodofremovingtheCover

Slideandpullthe Coverin

thedirectionofanarrow.

2-2MethodofstoringtheCover

TurntheCover, slideand

pushitinthedirectionof

arrow.

fig.1

fig.2

3.Features

KEW4106 is a2/ 3/4-Wire Digital Earth Resistance/ Earth Resistivity

Tester equipped with a microcomputer and can measure earth resistances

andcalculateearthresistivities (ρ).Thisinstrumentcan measureearth

resistancesonpowerdistributionlines,in-housewiringsystemandelectrical

appliancesetc.duetothelowoutputvoltage:approx10Vrmsorless.

●Designedtomeetfollowingsafetystandards.

IEC61010-1,IEC61010-2-030(CATIII300V,CATIV150V,Pollution

degree2)

IEC61010-031（Requirementsforhand-heldProbes）

IEC61557-1,5(EarthResistanceTester)

●Stablemeasurement results canbeobtained under anoisy environment

byintroducingtheFFT(FastFourierTransform)technology.

●Dot-matrix192x64,MonochromeLCD

●Backlightfunctiontoviewthetestresultsindimlyareas

●Canswitchfrequenciesofmeasuringsignal

4-kindoffrequencies:94/105/111/128Hz,areselectablebyhand

orautomatically.

●Rk Function is available to cancel the residual resistance on the Test

Leads.

●BatteryCheckFunction

●CanmeasureSeriesInterferenceVoltage/Frequency

VoltagevaluesandfrequenciesaredisplayedwhenSeries

Interferencevoltage(AC)exist.

●AuxiliaryEarthResistanceMeasurementFunction

Auxiliaryearthresistancesaremeasuredanddisplayed.

●WarningforAuxiliaryEarthResistanceMeasurements

WarningsaredisplayedontheLCDwhenauxiliaryearthresistancesare

toohighandmayresultininaccuratemeasurements.

●Auto-Power-OffFunction

Theinstrumentisautomaticallypoweredoffwhen5minpasseswithout

anyKeyoperation.

●MemoryFunction

Cansave800measuredresults.

●CommunicationInterface

Can transfer the saved data in the instrument to a PC via a supplied

OpticalAdaptor.

4.Specification

●ApplicableStandards

IEC61010-1 MeasurementCATIII300V,CATIV150VPollution

degree2

IEC61010-2-030 MeasurementCATIII300V,CATIV150VPollution

degree2

IEC61010-031 Standardforhand-heldProbes

IEC61557-1,5 EarthResistanceTester

IEC61326-1 EMCStandard

IEC60529  IP54

EN50581  RoHS

●Measuringrangeandaccuracy(23ºC±5ºC,relativehumidity45

75%RH)

Function Range Resolution MeasuringRange Accuracy

Earth

Resistance

(Rgatρ

measurement)

2Ω 0.001Ω 0.030〜2.099Ω ±2%rdg.±0.03Ω

20Ω 0.01Ω 0.03〜20.99Ω

Note1)

±2%rdg.±5dgt

200Ω 0.1Ω 0.3〜209.9Ω

2000Ω 1Ω 3〜2099Ω

20kΩ 10Ω 0.03k〜20.99kΩ

200kΩ 100Ω 0.3k〜209.9kΩ

AuxiliaryEarth

Resistance

Rh,Rs

8%ofRe+Rh+Rs

Earth

Resistivity

2Ω

0.1Ω

･

~1Ω

･

Auto-

ranging

0.2〜395.6Ω・ｍ

Note2)

ρ＝ 2×π×a×Rg

20Ω 0.2〜3956Ω・ｍ

200Ω 20〜39.56ｋΩ・ｍ

2000Ω 0.2ｋ〜395.6ｋΩ・ｍ

20kΩ

2.0ｋ〜1999ｋΩ・ｍ

200kΩ

Series

Note3)

Interference

Voltage

Ust(A.Conly)

50V 0.1V 0

50.9Vrms

±2%rdg.±2dgt

(50/60Hz)

±3%rdg.±2dgt.

(40

500Hz)

Frequency

Fst

Auto-

ranging

0.1Hz

1Hz

40Hz

499.9Hz ±1%rdg.±2dgt

Note1)Auxiliaryearthresistanceis100ΩwithRkcorrection

Note2)DependingonthemeasuredRg.Interval[a]betweenauxiliaryearth

spikesis1.0

30.0m

Note3)Thisinstrumentisnotdesignedtomeasurevoltagesoncommercial

powers.

●MeasuringmethodforEarthResistance

Fall-of-potentialmethod(currentsandvoltagesmeasuredviatheProbes)

●MeasurementmethodofEarthResistivity(ρ)

Wenner4-polemethod

●OutputCharacteristics

MeasuringVoltageUm (max.) approx 10Vrms 94Hz, 105Hz, 111Hz,

128Hz

MeasuringCurrentIm (max.)approx80mA,however,Im×（Re+Rh）

<Um

●MeasuringMethodforSeriesInterferenceVoltage(earthvoltage)

RMSRectifier(betweentheE-STerminals）

●MemoryCapacity:800data

●CommunicationInterface :Model8212USBOpticalAdaptor

●LCD Dot-matrix192×64,monochrome

 Backlight

 Earthresistance :max209.9kΩ

 Earthresistivity :1999kΩ･m

 SeriesInterferenceVoltage :max50.9V

●LowBatteryWarning :Batterymarkappears.

●ContinuousMeasurement :400timesormorewithmanganesebatteries;

repeatingmeasurementsatevery30sec

withaloadof1Ωat2ΩRange.

●Over-rangeIndication :OL

●Auto-Power-Off :automaticallypoweredoffwhen5min

passeswithoutanyKeyoperation.

●Locationforuse :

Indoor/Outdooruse(Notcompletelywaterproof),

altitude2000morless

●Applicablerange :

Testingearthresistanceonpowerdistribution

lines, in-house wiringsystem and electrical

appliances

●Temperature&Humidityrange(guaranteedaccuracy):

23℃±5℃ ,relativehumidity85％orless(nocondensation)

●OperatingTemperature&Humidityrange:

-10℃

50℃ ,relativehumidity75％orless(nocondensation)

●StorageTemperature&Humidityrange:

-20℃

60℃ ,relativehumidity75％orless(nocondensation)

●OverloadProtection:betweenE-S(P)andbetweenE-H(C)terminals

AC280V/10sec

●WithstandVoltage  :betweentheelectricalcircuitandenclosure

AC3540V(50/60Hz)/5sec

●InsulationResistance :betweentheelectricalcircuitandenclosure

50MΩormore/DC1000Ｖ

●Dimension 167（L）x185（W）x89（D）mm

●Weight approx900g（includingbatteries）

●PowersourceDC12V:sizeAAmanganesedrybattery(R6P)x8pcs

*Inauseofthisinstrumentunderlowtemperaturebelow0ºC,auseof

alkalinebatterieswithlowtemperaturespecisrecommended.

●Operatinginstrumentaluncertainty



Operatinginstrumentaluncertainty(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(En)duetovariations.

)15.1(

EEEEAB ++++±=

A:Intrinsicerror

:Variationduetochangingthesupplyvoltage

:Variationduetochangingthetemperature

:Variationduetoseriesinterferencevoltage

:Variation due to resistance of the probes and auxiliary earth electrode

resistance

●Rangetokeepthemaximumoperatingerror

Measurement range within which the maximum operating error (±30%)

applies.

 2ΩRange :0.5Ω

2.099Ω

 20ΩRange :2Ω

20.99Ω

 200ΩRange :20Ω

209.9Ω

 2000ΩRange:200Ω

2099Ω

 20kΩRange :2kΩ

20.99kΩ

 200kΩRange :20kΩ

209.9kΩ

VariationofSupplyVoltage:untiltheBatteryWarningmarkappears

TemperatureVariation:-10℃

50℃

SeriesInterference Voltage: 16･2/3Hz, 50Hz, 60Hz,400Hzand

DC3V

*Noneed toconsider DC Seriesinterference voltagesat 2Ω &20Ω

Ranges

Auxiliary earth electrode resistance : within following range or 50kΩ

orlesswhicheversmaller(Atρmeasurements,"Re"inthisformulais

replacedwith"Rg".)

Rh,Rslimit Accuracy

Re<0.40Ω 1kΩ

±5%rdg±1%fs

0.4Ω≦Re<1.00Ω 2kΩ

1.00Ω≦Re<2.00Ω 3.5kΩ

2.00Ω≦Re =Rex100+5kΩ(Rh,Rs<50kΩ)

5.InstrumentLayout

●InstrumentbodyandConnector

① LCD

② ENTER/SAVEKey

③ ESCKey

④ MENUKey

⑤ BacklightKey

⑥ CursorKey 

⑦ TESTButton

⑧ RangeSwitch

⑨ EarthTerminalE

⑩ ProbeTerminalESfortheEarthTerminalside

⑪ ProbeTerminalS

⑫ AuxiliaryEarthTerminalforCurrentH

⑬ TerminalsforOpticalAdaptor

①

②

③

④

⑦

⑤

⑥

⑧

⑨ ⑩ ⑪ ⑫ ⑬

●LCDIndications

●Accessories

#DANGER

●

DonotconnectthePrecisionMeasurementTestLeadswhereelectrical

potentialsexceeding33Vrmswithpeakvalueof46VorDC70V.



PleaseusetheSimplifiedMeasurementTestLeadsforvoltagemeasurement.

The Alligator clips need to be attached and used under CAT III / IV test

environmentsandtheFlatTestBarsareunderCATIItestenvironment.

PrecisionMeasurementTestLeadsMODEL7229A

(red40m,yellow20m,black20m,green20m)

SimplifiedMeasurementTestLeadsMODEL7238A

MemoryNo.

SiteNo.

Month-Day

Time

Wiring

Measuringsignal

frequency

CursorKeyisactive.

MainDisplay

ResultDisplayScreen

[Howtoattach]

Firmlyinsertandconnecttheadapteryouwanttousetotheendof

thecord(withbananaplugsatbothends).

Inserttheplugoftestleadsfirmlyintoeachterminal.Iftheyarenot

insertedfirmly,thelooseconnectionmaycauseinaccuratereadings.

ProtectiveFingerguard:It is a part providing protection against electrical

shock and ensuring the minimum required air and

creepagedistances.

#DANGER

●To avoidgetting electricalshocks,ensure thattestleads are

disconnectedfromtheinstrumentwhenreplacingthemetaltipor

adapterfortestleads.

Alligator clip

Protective

Fingerguard

Banana plugs, both ends

Flat test bar

Protective

Fingerguard

 AuxiliaryEarthSpikeMODEL8032x2sets(4spikesintotal)



CordReelMODEL8200-04x1set(4reelsintotal)(forMODEL7229A)

 OpticalAdaptorMODEL8212USBx1set

 CommunicationSoftwareCD-ROMKEWReportx1pce

 SizeAAManganesebattery(R6P)x8pcs

 CarryingcaseMODEL9125

 Shoulderstrapx1pce

6.MarksandMessagesdisplayedontheLCD

Followingmarksandmessagesaredisplayedwhilemeasurements.

MarksandMessages Details

Batteryvoltageislow.Replacethebatteries.

Thismarkisbeingdisplayedduringameasurement.

MeasuringrangefortheselectedRangeis

exceeded. In case of Ust measurements, 50V or

moreisdetected.

Failedtomakesuccessfulmeasurements

Rkisexceededthelimitvalue;exceeding2Ωat2

ΩRangeandexceeding9Ωat20ΩRange.

SettingforRkcanbemadeat20Ωorlower

Setting for Rk can be made only at 2w, 3w, 4w

measurements.

UstisRegulatedvalueormore.

Rh and Rsvaluesexceed the allowable range.

Correctresultsmightnotbeobtained.

Nosaveddataexists.

Memoryisfull.Nomoredatacansavedin.

Aconfirmationmessagebefore deleting the

selecteditem.

A confirmation message beforedeletingthe all

items.

Allitemshavebeendeleted.

NxxxisaMemoryNo.,andtheleftmessage

saying 95 data have been stored. (Displayed at

theDataReviewScreen.)

Indicatingthemeasuredresultissavedwith

MemoryNo.N003.

The characterS standsforSite. Selectable

from000to999.

Dataissuccessfullysaved.

7.MeasurementPrinciple

7-1PrincipleofEarthResistanceMeasurements

Thisinstrumentmakesearthresistancemeasurementswithfall-of-potential

method,whichisamethodtoobtainearthresistancevalueRxbyapplying

ACcurrentI between the measurement objectE (earthelectrode) and

H(C)(currentelectrode),andfindingoutthepotentialdifferenceVbetween

E (earth electrode) andS(P) (potential electrode). This unit outputs test

voltageUmto generateAC currentI. Earth resistancevalueRxis

determinedbytheACcurrentIandpotentialdifferenceV.SeeFig. ３.

7-2PrincipleofEarthResistivity(ρ)Measurements

AccordingtotheWenner4-polemethod,applyACcurrentIbetweenthe

E(earthelectrode)andH(C)(currentelectrode)tofindoutthepotential

differenceV between the potential electrodeS(P)and auxiliary earth

electrodesES.(Fig.4)

ToobtaintheearthresistanceRg(Ω),devidethepotentialdifferenceV

byACcurrentI;wheretheintervalbetweenelectrodedsisa(m).Then

useaformula:ρ＝ 2･π･a･Rg(Ω・m)

Fig.3

Fig.

8.PreparationforMeasurement

8-1BatteryVoltageCheck

Powerontheinstrument.IfthedisplayisclearwithouttheLowbatterymark

"

"showing,batteryvoltageissufficient.Ifthedisplayblanksorthe

Lowbatterymarkisindicated(Fig.5),replacethebatteriesaccordingto11.

forBatteryandFuseReplacement.

Note)Measurements cannot be made, even the Test Button is pressed,

whiletheLowBatteryMarkisdisplayedontheLCD.Measurements

arehaultwhentheLowBatteryMarkappearsontheLCD.

8-2Settings

8-2-1SettingItems

This instrument starts with Measurement mode (Fig.6 Main Screen) when

itispoweredonwhiletheRangeSwitchhasbeensettothepositionother

thanOFF.

Measurementconditionsshouldbesetbeforestartingmeasurements.

Settingthedateandtimeenablesasavingmeasureddata with time

information.Pressthe

KeyandenterintotheSYSTEMMENU

(Fig.7).ThenselectCONFIGSETTINGwithCursorKeys,andpressthe



KeytoenterintotheCONFIGSETTINGmode.(Fig.8) Pressing

the KeytwiceexitsfromtheCONFIGSETTINGmodeandreturns

toMeasurementmode.

Fig.6MainScreen

Fig.7 Fig.8

Fig.5Lowbatterymark

Settingsoffollowingparameterscanbemadeonthisinstrument

●Wire :Measurementmethod（WiringSystem）

●Freq :Measurementfrequency

●Site :Site(location)No

●Lh  :IntervaloftheauxiliaryearthspikesatEarthresistivity(ρ)

measurement

●Date/Time :Year/Month/Day,Time(24-hourdisplay）

●Rk  :ResidualresistanceontheTestLeads

8-2-2SettingforMeasurementMethod

Measurement methodisselectable from:2-wire(2-wire system),3-wire

(3-wiresystem),4-wire(4-wiresystem)andρ(earthresistivity).

SelectWirewiththeCursorKeyontheCONFIGSETTINGScreenand

pressthe

KeytoproceedtotheWiringSettingScreen.(Fig.9)

SelecttheappropriateWiringSystemwiththeCursorKeyandpressthe

 Key.ThentheCONFIGSETTINGScreenwiththeselectedWiring

Systemwillbedisplayed.

8-2-3SettingforMeasurementFrequency

Measurementsignalfrequenciescanbeselectedfromfollowingfour

frequency bands with this instrument in order to minimize the influence of

theseriesinterferencevoltage(earthvoltage).

*Auto*94Hz*105Hz*111Hz*128Hz

Theinstrumentautomaticallyselectthebestsuitablefrequencywhen

selectingAuto and output the frequency signal. SelectFreq with the

CursorKeyontheCONFIGSETTINGScreenandpressthe Keyto

displaytheFrequencySettingScreen(Fig.11).

Fig.

SelectingadesirablefrequencywiththeCursorKey,andpressingthe



KeyreturnstotheCONFIGSETTINGScreen(Fig.12)withthe

selectedfrequency.

8-2-4Site(location)No.Setting

Thesite(location)wheremeasurementsdonecanbesavedwithnumbers.

SelectSite with the CursorKey on the CONFIGSETTING Screen, and

pressthe KeytodisplaytheSiteNumberSettingScreen(Fig.13).

SelectanydigittobechangedwiththeCursorKey,andpressthe  

Key.Thentheselecteddigitishighlightedandreadytobechanged.(Fig.14)

Press theRight CursorKey  toincrease numbersand theLeft Cursor

Key toreducenumbers.KeeptheCursorKeypresseddowntochange

numbersquickly.Pressthe Keytoconfirmanumber.

Repeat this procedure to change the other digits. Press the   Key

whensettingsaredone.ThentheCONFIGSETTING Screen (Fig.15)with

theselectedSiteNo.willbedisplayed.

Note)SiteNo.isselectablefrom000to999.

Fig.12

Fig.13

Fig.14

Fig.15

8-2-5SettingfortheintervalbetweenAuxiliaryEarthSpikesatEarth

Resistivity(ρ)Measurements

Makingsettingoftheintervalsbetweenauxiliaryearthspikesisnecessary

tomeasureearthresistivity(ρ).

SelectLhwiththeCursorKeyontheCONFIGSETTINGScreen,and

pressthe

KeytodisplaytheLengthSettingScreen(Fig.16).

SelectanydigittobechangedwiththeCursorKey,andpressthe  

Key.Thentheselecteddigitishighlightedandreadytobechanged.(Fig.17)

Press the Right Cursor Key  to increase numbers and the Left Cursor

Key toreducenumbers.KeeptheCursorKeypresseddowntochange

numbersquickly.Pressthe Keytoconfirmanumber.

Repeat this procedure to change the other digits. Press the   Key

whensettingsaredone.ThentheCONFIGSETTINGScreen(Fig.18)witha

newintervalwillbedisplayed.

Note)Intervalscanbesetwithinarangeof1.0to30.0m.Ifalongerinterval

out of this range is entered at the Setting Screen, it automatically

changedto30.0mwhenpressingthe Key.

Note)Intervals up to 20m can be selected with the supplied Test Leads

MODEL7229A.

8-2-6DateandTimeSetting

Thisinstrumenthasaclockfunctionandcansavethemeasureddatawith

timeanddateinformation.Theclockwillnotberesetonceithasbeenset

evenafterpowering off theinstrument.Amanualadjustment isrequiredto

keeptheclocktimealwaysright.

Fig.

TimeSettingcanbedoneinfollowingprocedure.

SelectDate/TimewiththeCursorKeyontheCONFIGSETTINGScreen,

and press the

  Key to display the Time and Date Setting Screen

(Fig.19).

(1)TimeSetting

PutthecursoronTimeandpressthe KeytodisplaytheTime

SettingScreen(Fig.20).

SelectaparametertobechangedwiththeCursorKey,andpressthe 



Key.Thentheselecteddigitishighlightedandreadytobechanged.(Fig.21)

Theclockis24-hourdisplay.

Press theRightCursorKey to increase numbers and the Left Cursor

Key toreducenumbers.KeeptheCursorKeypresseddowntochange

numbersquickly.Pressthe

 

Keytoconfirmanumber.

Repeatthisproceduretochangetheotherdigits.Pressingthe Key

whensettingsaredonereturnstotheTime/DateSettingScreen(Fig.22).

Tochangethedate,proceedtoStep(2).Pressthe Keyagaintoexit

from the setting mode and return to the CONFIGSETTING Screen. Then

theclockstarts.

Fig.

(2)DateSetting

Dateisdisplayedinthefollowingorder:Month/Day/Year.

PutthecursoronDateandpressthe

KeytodisplaytheDate

SettingScreen(Fig.23).

SelectaparametertobechangedwiththeCursorKey,andpress

the  Key. Then the selected digit is highlighted and ready to be

changed.(Fig.24)

Press the RightCursor Key

 to increasenumbers and the Left Cursor

Key toreducenumbers.KeeptheCursorKeypresseddowntochange

numbersquickly.Pressthe

Keytoconfirmanumber.

Repeatthisproceduretochangetheotherdigits.Pressingthe

Key

whensettingsaredonereturnstotheTime/DateSettingScreen(Fig.25).

Pressthe Keyagaintoexitfromthesettingmodeandreturntothe

CONFIGSETTINGScreen.Thentheclockstarts.

Note)The second is not displayed on the Main Screen; only hours and

minutesaredisplayed.

Note)Thebackupbatterymaybeexhaustedwhenclockbecomeswrong

after powering on/off the instrument. In this case, please contact

ourlocaldistributor.Thelifetimeofthebackupbatteryisapprox5

years.

Fig.

8-2-7Settingfortheresidualresistance(Rk)ontheTestLeads

This instrument can store the residual resistance (Rk) of the Test Leads

beforestartingRemeasurements on2/ 3/4-wire system,and candeduct

theresistancefrom themeasuredresult.The settingofRkcanbedonein

followingprocedure.

Note)ConnectionsofTestleadsvarybymeasurementmethods.

 Seethecorrespondingpagesforfurtherdetails.

Note)Rk cannot besavedwhiletheLowBattery Mark

 or

isdisplayedontheLCD.

Selectthe2Ωor20ΩRange.

SelectRk with the Cursor Key on the CONFIGSETTING Screen, and

pressthe

KeytodisplaytheRkSettingScreen(Fig.26)

PresstheTestButtontomeasureRk.Themeasuredresultswillnotbesaved

untilthe

Buttonispressed.TheCONFIGSETTINGScreen(Fig.27)

isdisplayedwhentheButtonispresseddownandthedataissaved.

TheRk valueisbeingkepteven poweringoff theinstrument.Toclearthe

savedRkvalues,selectClearontheRkSettingScreen(Fig.28)andpress

the





Key.Thenthevaluerestoresto0.000Ω.

ThenCONFIGSETTINGScreen(Fig.29)isdisplayedagain.

Note)Rkvaluesexceedingfollowingvaluescannotbesaved.

2ΩRange:max2Ω,20ΩRange:max9Ω

AmessageshowninFig.30isdisplayedwhenthemeasured

Rkisexceedingabovevalues.

Note)ThemessageshowninFig.30isalsodisplayedwhenafuseblows.

Fig.

Followingmessageappearsandshowsthatthedatacannotbesavedwhen

the

Keyispressedwithabovedisplay.

Note)Following message appears and shows that the data cannot be

saved when trying to save Rk at 200kΩ or upper Ranges. The Rk

valuessavedat2Ωand20ΩRangesarekepteffectiveat200kΩor

upperRanges.

Note)Following message appears and shows that the data cannot be

savedwhentryingtosaveRkatWire(ρ)measurements.

8-3Backlight

To facilitate workingin dimlylit situationsor innight time,a backlight

functionisprovidedwhichilluminatesthe LCD. Press the

 Key to

operatethisfunction.Thebacklightwilllightupforabout30secandturned

off automatically. Pressing the   Key while the backlight is oncan

turnitoffbymanual.

8-4Auto-Power-Off

This instrument is automatically powered off about in 5 min after the last

switch operation.Toexitfromtheauto-power-off mode, settheRange

SwitchtoOFFpositiononce,and re-set ittotheRangeatwhicha

measurementtobeconducted.

Fig.

8-5SeriesInterferenceVoltage(EarthVoltage)Measurement

Measurementsareautomaticallystarted during a measurement of earth

resistances and earth resistivities, and the results can be checked on the

Resultdisplayscreen.

Warning messageVoltage High! is displayed on the Main display when

theearthvoltage(Ust)ishigh.

2Ω/20ΩRange :VoltageHigh!warningappearswhenthe

voltageis12Vorhigher.Earthresistance

measurement cannot be made when the voltage

exceeds15V.

200Ω〜 200kΩRange

:VoltageHigh!warningappearswhenthe

voltageis15Vorhigher.Earthresistance

measurement cannot be made when the voltage

exceeds20V.

Note)DCseriesinterferencevoltagescannotbemeasured.

8-6AuxiliaryEarthResistanceMeasurement

This instrument can measure and displaythe auxiliary earth resistances

(Rh, Rs).When the Rh or Rs value is more than Regulated value or50k

Ω,awarningmessage

or appear.TheLCD

showsRh=OL Ω orRs=OL when the Rh or Rs values exceed 50kΩ

.Theseparametersaremeasuredautomaticallyatauxiliaryearthresistance

measurements,andcanbecheckedontheResultDisplayScreen.

Note)Rhand Rs stand for Auxiliary Earth PoleH(C) and the Auxiliary

EarthResistanceofS(P)respectively.

8-7ConnectionofEarthTestLeadsandSimplifiedMeasurementProbes

Connect the Earth Test Leads and Simplified Measurement Probes to the

connectorsontheinstrumentfirmly.Otherwise,acontactfailureoccursand

wrongresultsmaybereadoutontheLCD.

Note)SomenumbersotherthanOLmaybedisplayedontheLCDwhen

makingmeasurementwithoutconnectinganycordorprobeat200Ω

orupperRanges.Thisisnotamalfunction.

9.MeasurementMethod

#DANGER

●Novoltageshouldbeappliedbetweenthemeasuringterminalsatearth

resistancemeasurements.

9-1EarthResistanceMeasurement

#CAUTION

●Themeasuredresultsmaybeinfluencedbyinductionifmeasure-ments

are made with the Test Leads twisted or in touch with each other.

WhenconnectingtheProbes,theyshouldbeseparated.

Note)Whenmeasuringmulti-earthedsystemsuchasinterconnectedtowers

andelectricalpoleswith thisinstrument, themeasured results

smaller than the valuesofsingle-earthedsystemareobtainedsince

these earth resistance can be considered that they are connected

inparallel. Letsregard earthresistanceundertestasRx,andthe

otherearthresistancesasR1,R2,•••Rn.

Oftheseearthresistances,R1,R2,•••Rncanbeconsideredthattheyare

connectedinparallel. And can beregardedas a combinedresistanceRs.

The Rs can be regarded small enough against Rx since it is a combined

resistanceconsists ofseveralresistances.Sothemeasuredvalues

obtained by using this instrument will be quite small since Rs values are

measuredactually.Tomeasureearthresistancesofmulti-earthedsystem,a

useofourDigitalEarthClampMODEL4200isrecommended.

9-1-1PreciseMeasurement(3-Wire)*withEarthTestLeadsMODEL7229A

Thisisastandardmethodtomeasureearthresistances.Themeasuredearth

resistancesarefreeofauxiliaryearthresistancesbuttheresistancesonthe

Eterminalarecontained.

Terminalstobeused :E,S(P),H(C)Terminals

TestLeads  :connecttotheE,S(P),H(C)Terminals

AuxiliaryEarthSpike :2pcs,connecttotheS(P)andH(C)terminal

(1)SettingofWiringSystem

SelectWire (3) with reference to8-2-2 Setting for Measurement

Methodinthismanual.

(2)SettingofRk

1.Firmly inserteach plugof 3test leads(green, yellow, red) to the

correspondingconnectorsontheinstrument.

2.Selectthe2Ωor20ΩRange.

3.Engage3Alligatorclipstoshort-circuitallofthem.

4.SavetheRkvalues withreference to8-2-7Settingfor theresidual

resistanceontheTestLeads.

Note)A break in Test Leads or burnout of Fuse is suspected when the

LCDshowsRk=OLΩwhile3TestLeadsarebeingshorted.

(3)ConnectionofAuxiliaryEarthSpikesandTestLeads

SticktheAuxiliaryEarthSpikesS(P) andH(C) into the ground

deeply.Theyshouldbealignedatanintervalof5-10mfromtheearthed

equipmentundertest.Connect thegreenTestLeadto theearthed

equipmentundertest,theyellowTestLeadtotheAuxiliaryEarthSpike

S(P) andtheredTestLeadtotheAuxiliaryEarthSpikeH(C).

(Fig.34)

YellowYellow

Red

Green

Earthed Electrode

under Test

Auxiliary

earth spikes

Fig.

(4)EarthResistanceMeasurement

Select a Range (any Range is ok) when the connection is done, and

presstheTESTButton.Amessage

isdisplayed

attheupperrightontheLCD.ThemeasuredearthresistancesReare

displayedontheLCDwhenameasurementisfinished.(Fig.35)

PressingtheCursorKey

displaystheResultDisplayScreen

(Fig.36)tovieweachparameter.

Pressthe KeytoreturntotheMainScreen.

Note)

Thereadingsmaynotcorrect when the auxiliaryearthresistanceis

toohigh.SticktheAuxiliaryEarthSpikesS(P)andH(C)inthemoist

part of thesoil.Ifa message

  or 



appear on the LCD, auxiliary earth resistance is too high to make

measure-ments.RechecktheconnectionofTestLeads.

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clothetc.onthespikewhenmakingmeasurements.

Fig.

#DANGER

TheRemeasurementcannotbemadewhenawarningmessageVoltage

High!!likeshowninFig.37appearontheLCD.Voltagesmorethan15V

existbetweentheEandS(P)terminals.

Pressingthe

KeyshiftsthedisplayasshowninFig.38.

ThemessageUst=OLVmeanstheUstismorethan50V.

To avoid this, make measurements after reducing the earth voltages by

turningoffthepowersupplyoftheequipmentundertestetc.

9-1-2PreciseMeasurement(4-Wire)*withEarthTestLeadsMODEL7229A

TheESTerminalisalsousedwiththeotherterminalsusedatthe3-wire

Precise measurements.In this case, more precise results can be obtained

becauseauxiliary earth resistancesofthemeasuredearthresistances

are excluded, moreover, resistance of the Test Leads connected to the E

Terminalcanbecanceled.

Terminalstobeused :E,ES,S(P),H(C)Terminals

TestLeads  :connecttotheE,ES,S(P),H(C)Terminals

   (theES Test Lead should be connected to the

earthedequipmentunder test wheretheETest

Leadisconnected.)

AuxiliaryEarthSpike :2pcs

(1)SettingofWiringSystem

SelectWire(4) withreference to8-2-2 Settingfor Measurement

Methodinthismanual.

Fig.

(2)SettingofRk

The measured results obtained at 4-Wire system are not be influenced

bytheTestLeadsConnectedtotheETerminal,butsettingofRkcan

bemadeonthisinstrument.

1.Firmlyinserteachplugof4TestLeads(green,black,yellow,red),to

thecorrespondingconnectorsontheinstrument.

2.Selectthe2Ωor20ΩRange.

3.Engage4Alligatorclipstoshort-circuitallofthem.

4.Save theRkvalueswithreferenceto8-2-7 Settingfortheresidual

resistance(Rk)ontheTestLeads.

Note)A break in Test Leads or burnout of Fuse is suspected when the

LCDshowsRk=OLΩwhile4TestLeadsarebeingshorted.

(3)ConnectionofAuxiliaryEarthSpikesandTestLeads

SticktheAuxiliaryEarthSpikesS(P)andH(C)intothegrounddeeply.

Theyshouldbealignedatanintervalof 5-10m fromtheearthed

equipment undertest.Connect thegreen TestLeadto theearthed

equipmentundertest,theyellowTestLeadtotheAuxiliaryEarthSpike

S(P)andtheredTestLeadtotheAuxiliaryEarthSpikeH(C).

TheblackTestLeadconnectedtotheESTerminalshouldbe

connectedtotheearthedequipmentundertest.(Fig.39)

(4)EarthResistanceMeasurement

Select a Range (any Range is ok) when the connection is done, and

presstheTESTButton.ThemeasuredearthresistancesReare

displayed on the LCD. The operation procedure is same to that for

3-Wiremeasurements.

Fig.

YellowYellow

Red

Green

Earthed Electrode

under Test

Auxiliary

earth spikes

Note)Ifamessage or appearontheLCD,

auxiliaryearthresistanceistoohightomakemeasurements.

RechecktheconnectionofTestLeads.

9-1-3SimplifiedMeasurement(2-Wire)*withSimplifiedTestProbesMODEL7238A

#DANGER

●Use a Voltage detector to check the earth of the commercial power

supply.

●Donotusetheinstrumenttochecktheearthofthecommercialpower

supply. A danger will be caused because the voltage may not be

displayedwhen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 this instrument tomeasurethevoltageofcommercial

Powersupply.Thisinstrumentisnotdesignedtomeasurevoltagesof

commercialpowersupply.

●Whenusingthe supplied SimplifiedTest Probes, theS(P)and

H(C)Terminalswill be short-circuited andthe input impedancewill

be reduced.Theresidualcurrent circuit breaker may operate when

makingmeasurementsofthevoltageinthecircuitwiththebreaker.

●

ELCBsmaytripwhenperformingsimplifiedmeasurementsontheoutlet

ofthecircuitwithELCBssincethisinstrumenthaslargetestcurrents.

Use this method when the Auxiliary 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the2-Wiremethod.

However, the measuredearthresistances containtheauxiliaryearth

resistanceandtheresistanceoftheETestLead.

ThisinstrumentissuppliedwithasetofSimplifiedMeasurementTestLeads

forwhichbothofAlligatorClipsandFlatTestBarcanbereplacedandused

ifnecessary.

Terminalstobeused :E,S(P),H(C)Terminals

TestLeads  :one to theE Terminal, Simplified Measurement

Probesto theS andH Terminals and short-

circuittheseTerminals.

AuxiliaryEarthSpike :Noneisused

(1)SettingofWiringSystem

SelectWire (2) with reference to8-2-2 Setting for Measurement

Methodinthismanual.

(2)SettingofRk

1.PuttheAlligatorClipstothe2TestLeads(green,red),andconnect

thegreenPlug totheE Terminal and thetwo red Plugsto the

S(P)andH(C)Terminalsrespectively.

2.Selectthe2Ωor20ΩRange.

3.Engage2Alligatorclipstoshort-circuitbothofthem.

4.Save theRkvalueswith reference to8-2-7 Settingfortheresidual

resistance(Rk)ontheTestLeads.

Note)A break in Test Leads or burnout of Fuse is suspected when the

LCDshowsRk=OLΩwhile4TestLeadsarebeingshorted.

(3)Connection

ConnecttheTestLeadsasshowninFig.40.

Note)WhenthesuppliedSimplifiedMeasurementProbesarenotused,the

S(P)andH(C)Terminalsshouldbeshorted.

(4)EarthResistanceMeasurement

SelectahighresistanceRangewhentheconnectionisdone,andpress

theTESTButton. Then the earthresistancevaluesRe aredisplayed

ontheLCD.SelectalowerRangeforthelowearthresistances.

Earthed

Electrode

under Test

Secondary

Primary

Side

Be sure to check

earthed side of

a commercial

power supply.

Supply Transformer

Where earth for mains supply is used.

Fig.

(5)Measuredresistancesatsimplifiedmeasurements

Two-Wiremethodisusedforthesimplifiedmeasurements.Inthis

method,earthresistanceofthe earthedelectrode(re) connectedtothe

S(P)TerminalisaddedtothetrueearthresistanceRxandshownas

anindicatedvalueRe.

Re(indicatedvalue)=Rx+re

IftheRe is knownbeforehand,trueearthresistancevalue Rx is

calculatedasfollows.

Rx=Re-re

Note)TherecannotbecanceledbythesettingofRk.

9-2EarthResistivity(ρ)Measurement

#CAUTION

●Themeasuredresultsmaybeinfluencedbyinductionifmeasure-ments

are made with the Test Leads twisted or in touch with each other.

WhenconnectingtheProbes,theyshouldbeseparated.

Making a setting of the interval between Auxiliary Earth Spikes first and

measuringtheearthresistanceswiththe4AuxiliaryEarthSpikesstuckinto

thegroundatevenintervals.Thentheinstrumentcancalculateanddisplay

earthresistivityontheLCDautomatically.

Terminalstobeused :E,ES,S(P),H(C)Terminals

TestLeads  :connecttotheE,ES,S(P)andH(C)Terminals

AuxiliaryEarthSpike :4pcs

(1)SettingofWiringSystem

SelectWire (ρ)with reference to8-2-2 Setting for Measurement

Methodinthismanual.

Note)The instrument doesn't accept any setting change onRk while

measuringearthresistivity(ρ).

(2)ConnectionofAuxiliaryEarthSpikesandTestLeads

StickthefourAuxiliaryEarthSpikesintothegrounddeeply.Theyshould

bealigned atanintervalof1-30m.Thedepth shouldbe5%orlessof

theintervalbetweenthespikes.

(e.g.Thespikeshouldbestuckinthedepthof25cmorlesswhenthe

intervaloftheAuxiliaryEarthSpikesis5m.)

IftheSpikesstucktoodeep,itmayresultininaccurateearthresistivity

measurement.

Note)ThesuppliedTestLeadsMODEL7229AcanbeusedfortheSpikes

stuckattheintervalofmax20m.

Note)The lengthof thesupplied AuxiliaryEarth SpikeMODEL 8032 is

20cm.

Connect thegreen, black, yellowTest Leads connected totheE,ES,

S(P)andH(C)TerminalsontheinstrumenttotheAuxiliaryEarthSpikes

fromtheclosesttothefarthestinthisorder.(Fig.41)

(3)SettingoftheIntervalbetweenAuxiliaryEarthSpikes

The interval of the Spikes should be entered according to the setting

made at the step of8-2-5 Setting for the interval between Auxiliary

EarthSpikesatEarthResistivity(ρ)Measurements.

(4)EarthResistivity(ρ)Measurement

Select a Range (any Range is ok) when the connection is done, and

press the TEST Button.Then the measuredearth resistivity (ρ) and

the earth resistanceRg between the ES-S Terminals are displayed.

(Fig.42)

Fig.

PressingtheCursorKey

  displays parameters like shown in

Fig.43.

Pressthe KeytoreturntotheMainScreen.

IftheRgvalueistoolarge,thedisplayreadsasshowninFig.44.

Inthiscase,rotatetheRangeSwitchandselectanupperRange.

Pressing the  Keywhile the measuredresult of ρis being

displayed switches the display as indicated in Fig.16. Then setting of

intervalbetweenauxiliaryearthspikes(Lh)canbemade.Clause8-2-5

describesthedetailedsettingprocedure.

Note)Thedepthshouldbe5%orlessoftheintervalbetweenthespikes.

Ifthe Spikesstuck toodeep, itmay resultin inaccurate earth

resistivitymeasurement.

Note)Accurate earth resistivity measurement will be affected and errors

in measured result becomes large if theRg value is smaller than

the full-scale value at the selectedRange.When theRg andρ

values vary widely at each Range, measurements should be made

againatproperRgRange.

Note)If a message

  o r     appear onthe

LCD, auxiliary earthresistance is too high to make measurements.

RechecktheconnectionofTestLeads.

Fig.

10.Store/RecalltheMeasurementResults

Measurementconditionsandmeasuredresultscanbesavedinthememory

oftheinstrument.(max800)

ThestoreddatacanbetransferredtoaPCviaanOpticalAdaptor

Model8212USBbyusingaspecialsoftwareKEWReport.

10-1Howtosavethedata

Pressthe

Keywhenanearthresistancemeasurementisfinished.

ThentheLCDreadsasshowninFig.45.

Pressthe 



Keyagain,andthensavedisdisplayedwithhighlighted

atthelowerrightoftheLCDandthemeasuredvaluesaresaved.(Fig.46)

Pressthe KeytoreturntotheMainScreen.

Note)PressingtheTESTButtonagaininitiatesanothermeasurement.

Note)Data cannot be saved while the Low Battery Mark is displayed on

theLCD.

Note)Whenthesaveddatareachestothemaxlimitofthecapacity(800),

FullisdisplayedattheupperleftontheLCDasshown in Fig.47

andnomoredatacanbesaved.

Whentryingtosavedatawithmemorycapacityisfull,amessageshownin

Fig.48isdisplayed.Pressthe KeyandreturntotheMainScreen.

To save new data, it is necessary to delete the old data first. See10-3

Howtodeletethesaveddatatodeletethesaveddatainthememory.

Fig.

10-2Howtorecallthesaveddata

ThesaveddatacanbedisplayedontheLCDaccordingtofollowing

sequence.

Pressthe

KeyontheMainScreentodisplaytheSYSTEMMENU

Screen.(Fig.49)

PutthecursortoReviewDataandpressthe

Keytodisplaythe

ReviewScreen.(Fig.50)ThenthemeasureddataissavedwithaMemory

No,SiteNoanddate/timeinformation.

PresstheCursorKeys

or KeyandselectDataNo.

KeepaCursorKeypresseddowntoalterthenumberquickly.

Note)Whennodatahasbeensavedinthememory,followingmessageis

displayedontheLCD.(Fig.51)

Pressthe KeytoreturntotheMainScreen.

10-3Howtodeletethesaveddata

Thesaveddatacanbedeletedaccordingtofollowingsequence.

10-3-1Deletethedataonebyone

PresstheCursorKeys and ontheReviewScreen(Fig.52)

andselectthedatatobedeleted.

Pressthe

Keytodeletetheselecteddata.(Fig.53)

Fig.

Pressingthe

or KeywhilethecursorisontheCancel

returnstotheReviewScreenwithoutdeletingdata.

PutacursortoDeleteandpressthe

Key.(Fig.54)Thena

confirmationmessageisdisplayedontheLCD.(Fig.55)

Pressthe KeytoreturntotheReviewScreenwithoutdeletingdatawhile

amessageshowninFig.55isdisplayedontheLCD.Pressthe

Keyto

deletetheselecteddata.ThentheReviewScreenisdisplayedwiththenextdata.

Note)Numberof thesaveddata isdecreasedafter deletingsome data,

but the Data No will not be changed. So the last Memory No. may

becomebiggerthantheNo.showingthenumberofthesaveddatain

thememory.(Fig.56)FuturedatawillbesavedwiththeemptyMemory

No.automaticallyandtheexistingdatawillnotbeoverwritten.

10-3-2Deletethewholedataone-time

Pressthe





KeyattheReviewScreen,andselectDelAllwiththe

CursorKeys.Thenpressthe 



Keyagain.(Fig.57)

ThenaconfirmationmessageisdisplayedontheLCD.(Fig.58)

Fig.

Pressthe

KeytoreturntotheReviewScreenwithoutdeletingdata.

Pressthe

Keytodeletethewholedata.Thenafollowingmessage

isdisplayedontheLCD.(Fig.59)

Pressingthe

KeyreturnstotheSYSTEMMENUScreen.Another

pressofthe KeyreturnstotheMainScreen.MemoryNo.is

restoredtoN001.

10-4HowtotransferthestoreddatatoaPC

Thestoreddatacanbetransferredaccordingtofollowingsequence.

ThespecialsoftwareKEWReportshouldbeinstalledbeforehand.

(1)ConnectModel8212USBtotheUSBterminalofaPC.

(2)Disconnect the TestLeads fromthe instrument,and connect Model

8212USBasshowninFig.60.

(3)PowerontheinstrumentwhilesettingtheRangeSwitchtoanyposition.

(4)Start the special softwareKEW Report on your PC, and then click

Downloadcommand.Thedataintheinstrumentwillbetransferredto

your PC. For further details, please refer to the instruction manual for

Model8212USBandtheHELPofKEWReport.

Fig.

11.BatteryandFuseReplacement

#DANGER

●Neverattempttoreplacebatterieswhilemakingmeasurements.

WhenreplacingtheFuse,usetheonewithsamespecification.

#WARNING

●Toavoidelectricalshockhazard,disconnecttheTestLeadsfromthe

instrumentbeforeopeningtheBatteryCompartmentCover.Screwand

fastentheCoverwhenareplacementworkcompletes.

#CAUTION

●Donotmixnewandoldbatteries.

Install batteries in the orientation as shown inside the Battery

Compartment,observingcorrectpolarity.

●Whendisposingtheoldbatteries,pleasefollowyourlocalregulations.

11-1BatteryReplacement

1.Set the Range Switch to theOFF position, and disconnect the Test

Leadsfromtheinstrument.

2.Unscrew the Battery-Compartment-fixing screws, and remove the Cover

andreplacethebatterieswithnewones.Replaceall8batteries.

3.FixtheCoverafterreplacingbatteriesandscrewuptheCover.

11-2FuseReplacement

1.Set the Range Switch to theOFF position, and disconnect the Test

Leadsfromtheinstrument.

2.UnscrewtheBattery-Compartment-fixingscrews,andremovetheCover.

Replacethefusewithnewone.(Fig.61)

FuseSpec:F500mA/600V,dia.6.35x32mm.

3.FixtheCoverafterreplacingafuseandscrewuptheCover.

SPAREFUSE

SCREW

FUSE

BATTERY

Fig.

12.CaseandShoulderstrapAssembly

Byhangingtheinstrumentaroundtheneck,bothhandswillbeletfreefor

testing.

PasstheShoulderstrapdownthrough Adjustthestrapforlengthand

thebucklefromthetop.(Fig.62) secure.(Fig.63)

Fig.

13.BeforeSendingforService

If this instrument should fail to operate correctly, return it to your nearest

Distributorstatingtheexactnatureofthe fault. Before returning the

instrument,followthetrouble-shootingguideshownbelow.

●Instrumentdoesn'tpoweron

OpentheBatteryCompartmentCoveratthebacksideoftheinstrument,

andcheckwhetherbatteries are missing orthey areinstalledincorrect

polarity.(Referto11.BatteryandFuseReplacement)Batteriesarenot

installedintheinstrumentatthetimeofshipment.

●IncapableofsettingRk(Fig.64,65)

SelectableRkvaluesat 2Ωand20ΩRangesare upto9Ω.Arethe

TestLeadsshort-circuited?AbreakinTestLeadsorburnoutofFuseis

suspectedwhentheLCDreadsOLwhiletheconnectioniscorrectand

thecordsareshorted.

Rksettingisavailableat20ΩorlowerRanges.(Fig.66)

Rkcannotbesetwhenmeasuringearthresistivity.(Fig.67)

(Refer to8-2-7 Setting for the residual resistance (Rk) on the Test

Leads).

Fig.

●Incapableofmeasuringearthresistance

Voltagesof20VormorearebeingappliedbetweentheEandS(P)

Terminals.(Fig.68)

Theupperlimitofthemeasuringrangemaybeexceeded.(Fig.69)

SelectanupperRange.

TheTestLeadsmaybeloose.(Fig.69)

Checktheconnectionsagain.

●MarksshowninFig.70and71aredisplayedatRemeasurements

The Rh or Rs value is more than (500+Re×100)Ω or 50kΩ or more;

itresultsininaccuratemeasurement.Checktheconditionofthe

Earth Spikes stuck into the ground. (Refer to9-1 EarthResistance

Measurement)

●TheLCDreadsρ=OLorRg=OLatearthresistivitymeasurements.

 Remeasurements.(Fig.72)

TheRgvalueexceedstheupperlimitoftheRange.SelectanupperRange

and test again. At earth resistivity measurements, the display readsOL

when the intervals between the spikes become longer although a proper

Rangeisselected.Maxindicationoftheearthresistivityvalueis1999kΩ.

(RefertoMeasuringrangeandtolerancedescribedat4.Specificationand

9-2.EarthResistivity(ρ)Measurement. )

Fig.

●Incapableofsavingdata

TheLCDreadsasshowninFig.73.

Thememorycapacityisfull.(800data)Tosavenewdata,olddatashould

bedeletedfirst.(See10.Save/RecalltheMeasurementResults)

●IncapableoftransferringdatatoPC

Instrumentispoweredon?

MODEL8212USBCableandthePCareconnectedproperly?

MODEL 8212 USB Cable is properly connected to the Communication

Connectoroftheinstrument?

DatatransferwillbeinterferediftheInfraredCommunicationTerminalis

dirt;cleantheTerminalwithacleancottonswab.

Fig.

5-18 92-1962D

DISTRIBUTOR

Kyoritsureservestherightstochangespecificationsordesignsdescribedinthis

manualwithoutnoticeandwithoutobligations.

Produkt Specifikationer

Mærke:	Kyoritsu
Kategori:	Måleudstyr
Model:	KEW 4106

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