EGAmaster 51251 User manual

INSULATION RESISTANCE
MULTIMETER
OPERATING INSTRUCTIONS
GUARANTEE...........................23
COD. 51251

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ENGLISH
INSULATION RESISTANCE MULTIMETERS
INTRODUCTION
The code 51251 is a battery-powered, true RMS insulation multimeter (hereafter “the Meter”) with 6000
count display.
THE METER MEASURES OR TESTS THE FOLLOWING:
• AC/DCvoltageandcurrent
• Resistance
• Voltageandcurrentfrequency
• Diode
• Continuity
• Capacitance
• Temperature
• InsulationTesting
SAFETY INFORMATION
ThisMetermeetsCATIII1000VandCATIV600VIEC61010standards:inpollutiondegree2anddouble
injection.
CATIII:Distributionlevel,xedinstallation,withsmallertransientovervoltagesthanCATIV.
CATIV:Primarysupplylevel,overheadlines,cablesystemsetc.
UsetheMeteronlyasspeciedinthisusersmanual.OtherwiseprotectionprovidedbytheMetermaybe
impaired. See Table 1 for a list of symbols used on the Meter and in this manual.
Warningidentieshazardousconditionsandactionsthatcouldcausebodilyharmordeath.
CautionidentiesconditionsandactionsthatcoulddamagetheMeter,theequipmentundertest,orcause
permanent loss of data.
Warning
Toavoidpossibleelectricshockorpersonalinquiry,followtheseguidelines:
• UsetheMeteronlyasspeciedinthismanualortheprotectionprovidedbytheMetermightbe
impaired.
• DonotusetheMeterortestleadsiftheyappeardamaged,oriftheMeterisnotoperatingproperly.If
indoubt,havetheMeterserviced.
• Alwaysusetheproperterminal,switchposition,andrangeformeasurementsbeforeconnecting
Meter to circuit under test.
• VerifytheMeter’soperationbymeasuringaknownvoltage.

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• DonotapplymorethantheratedvoltageasmarkedontheMeter,betweentheterminalsorbetween
anyterminalandearthground.
• Usecautionwithvoltagesabove33Vacrms,46.7VacPeakor70Vdc.Thesevoltagesposeashock
hazard.
• Replacethebatteryassoonasthelowbatteryindicatory( ) appears.
• Disconnectcircuitpoweranddischargeallhigh-voltagecapacitorsbeforetestingresistance,
continuity, diodes, or capacitance.
• DonotusetheMeteraroundexplosivegasorvapor.
• Whenusingthetestleads,keepyourngersbehindthengerguards.
• Inordertocomplywiththesafetystandard,theMetermustbeusedalongwiththeincludedtestleads.
Anydamagesofthetestlead,mustreplaceitwiththesamemodelnumberandspecication.
• RemovetestleadsfromtheMeterbeforeopeningtheMetercaseorbatterydoor.Neveroperatethe
Meterwiththecoverremovedorthebatterydooropen.
• Complywithlocalandnationalsafetyrequirementswhenworkinginhazardouslocations.
• UndertheinuenceofRadio-FrequencyElectromagneticField&ConductedRadio-Frequency
ElectromagneticFieldphenomenon.Thecaptionedmodelhaveamagnicenterrorinfunctionmeasurement.
Itwillbebacktonormalwhentheinterferenceisremoved.
• Useproperprotectiveequipment,asrequiredbylocalornationalauthoritieswhenworkingin
hazardousareas.
• Avoidworkingalone.
• Useonlythereplacementfusespeciedortheprotectionmaybeimpaired.
• Checkthetestleadsforcontinuitybeforeuse.Donotuseifthereadingsarehighornoisy.
• Donotusecurrentterminalsorcurrentrangetotestvoltage.
TABLE 1. SYMBOLS
DoubleInsulated EarthGround
AC(AlternatingCurrent) DC(DirectCurrent)
Diode Battery (Low battery when shown on
display)
ContinuityBuzzer ACorDC(AlternatingCurrentor
DirectCurrent)
ConformstoStandardofEuropeanUnion
UNPACKING INSPECTION
OpenthepackagecaseandtakeouttheMeter.Checkthefollowingitemscarefullytoseeanymissingor
damagedpart:
Table 2. Unpacking Inspection
Users Manual 1 piece
Test Lead 1 pair
Short Lead 1 pair
Alligator Clip 1 pair
K type thermocouple 1 piece
Batteries AA (AM3/LR6) 6 pieces
Intheeventyoundanymissingordamage,pleasecontactyourdealerimmediately.

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THE METER STRUCTURE
Figure 1. The Meter Structure
1. FrontHousing
2. LCDDisplay
3. FunctionalButtons
4. RotarySwitch
5. InputTerminals
ROTARY SWITCH POSITIONS
TurntheMeteronbypressingthePOWER button. Use the BLUE button to select any rotary switch
alternatefunctions(labeledwithblueletters).RotaryswitchselectionsareshowninFigure2anddescribedin
Table3.
Figure 2. Rotary Switch

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Table 3. Rotary Switch Selections
Switch Position Measurement Function
ACvoltagefrom60mVto1000V
DCvoltage1mVto1000V
DCmV0.01mvto600mV
code 51251 Temperaturefrom-40°Cto+537°C(-40°Cto+998°F).Celsiusisthedefault
temperature measurement unit
Ohmsfrom0.1to40M.
Capacitancefrom0.01nFto100µF
Continiutytest.Beeperturnsonat<30
Diodetest.Thereisnoranginginthisfunction
DCmAfrom0.01mAto600mA(600mAoverloadfor2minutesmaximum)
ACmAfrom3mAto600mA(600mAoverloadfor2minutesmaximum)
insulation Presstoperforminsulationtest
From0.1Mto2G.Select50V,100V,250V,500Vand1000Vtestingvoltage
BUTTONS
Usethebuttonstoactivatefeaturesthataugmentthefunctionselectedwiththerotaryswitch.Thebuttons
areshowninFigure3describedinTable4.
Figure 3. Buttons
Table 4. Buttons
Button Description
POWER PressPOWER to turn on the Meter
PressandholdPOWERtoturno󰀨theMeter
HOLD
IninsulationTestmode,thisschedulesatestlockthenexttimeyoupressTESTonthe
Meter.ThetestlockactstoholddownthebuttonuntilyoupressHOLDorTESTagain
toreleasethelock.
Inordermeasurementmode:Presstofreezethedisplayedvalue.
Pressagaintoreleasethedisplay.
Pressandholdthebuttontoclearthestoreddata.
Pressthebuttontoturnthebacklightonando󰀨.
SAVE
Pressthisbuttontostorethesinglerecord.
Pressandholdthisbuttontostoredatacontinuously.PressSAVEagaintoexit
continuousdatastoringmode.
Themaximumnumberofdatastoreis99sets.TheMeterdisplaysFULLwhenitreaches
themaximum.PressCLRtoclearthestoreddatainordertostorenextsetofdata

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LOAD
• Pressthisbuttononcetorecallthestoredvalue.Pressortorecallthepreviousornext
storedvalue.PressLOADagaintoexitdatarecallmode.
• Pressandholdthisbuttontorecallthestoreddatacontinuously.PressLOADagainto
exit.
• AfterenteringtheLoadmode,itisnotallowedtoturntherotaryswitchtoenterto
measuringmode.YoucanonlyenterthemeasuringmodeafterexitingtheLoadmode.
InMeasurementmode,exceptbuzzer,diodeandinsulationtest,presstostartretaining
maximumvalue.
InLoad,eachpresstogobacktothepreviousstoredreading
InMeasurementmode,exceptbuzzer,diodeandinsulationtest,presstostartretaining
minimumvalue.
InLoad,eachpresstorecallthenextstoredreading.
RANGE
InInsulationTestmode,presstoselectdi󰀨erenttestingvoltage.
Inothermode,exceptbuzzeranddiode,presstochangeRangingmodefromAutoto
ManualRangingmode.PressandholdtoreturntoAutoRangingmode.
SELECT Functionsasashiftkey.Presstoaccessorangefunctionsontherotaryswitch.
InitiatesaninsulationtestwhentherotaryswitchisontheINSULATIONposition.Causes
theMetertosource(output)ahighvoltageandmeasureinsulationresistance.
InMeasurementmode,activatefrequencymeasurement.
UNDERSTANDING THE DISPLAY
DisplayindicatorsareshowninFigure4anddescribedinTable5.
Figure 4. Display indicators
Table 5. Display Indicators
Indicator Description
MAX Indicatesmaximumreadinghasbeenselected.
MIN Indicatesminimumreadinghasbeenselected.
H Indicatesdisplayholdisactive
Diodetestfunctionisselected
DCAC AC/DCVoltageorCurrentmeasurement
trms True RMS measurement
Continuitytestfunctionisselected
Lowbattery.Indicateswhenitistimetoreplacethe
battery.
Warning
Toavoidfalsereadings,whichcouldleadtopossible
electricshockorpersonalinjury,replacethe
battery as soon as the low battery indicator
appears

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Highvoltagewarning
AutoRange Autorangingmode
ManualRange Manualrangingmode
61000mV Displayrangeinuse
-Negativesymbol
>Greaterthansymbol
Primarydisplay
MEM Datastoresymbol
MR Datarecallsymbol
The number of stored data
FULL
Whenthenumberofstoreddatareaches99,the
displaywillshowFULL.
Whenthenumberofstoreddataisfull,pressCLR
toclearupthestoreddatabeforestoringanother
set of data.
CLR Clearupthestoreddata
Indicatesatestlockwillbeappliedthenexttime
youpressTESTontheMeter.Thetestlockacts
toholddownthebuttonuntilyoupressHOLDor
TESTagain.
2500V
1000V
Sourcevoltageratingforinsulationtest.
50V,100V,250V,500Vand1000Vrangesavailable.
SecondaryDisplay
Measurement units
MAKING BASIC MEASUREMENTS
MEASURING AC VOLTAGE (see gure 5)
Figure 5. Measuring AC Voltage

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Warning
To avoid harm to you or damages to the Meter from electric shock, please do not attempt to
measure voltages higher than 1000V although readings may be obtained.
TheACVoltagerangesare:6.000V,60.00V,600.0Vand1000V.Ifovertherange,itdisplays“OL”.To
measureACvoltage,connecttheMeterasfollows:
1. InserttheredtestleadintotheVΩ terminalandtheblacktestleadintotheCOMterminal.
2. Set the rotary switch to
3. Connectthetestleadsacrosswiththeobjectbeingmeasured.Themeasuredvalueshowsonthedisplay.
4. ThedisplayedvalueisTrueRMS.
Note:
• Ifthevalueofvoltagetobemeasuredisunknown,settheMetertoautorangingorusethemaximum
measurementposition1000Vandreducetherangestepbystepuntilasatisfactoryreadingisobtained.
• Ineachrange,theMeterhasaninputimpedanceof10MΩ.Thisloadinge󰀨ectcancause
measurementerrorsinhighimpedancecircuits.Ifthecircuitimpedanceislessthanorequalto10kΩ,the
errorisnegligible(0.1%orless).
• WhenDCvoltagemeasurementhasbeencompleted,disconnecttheconnectionbetweenthetesting
leadsandthecircuitundertest,andremovethetestingleadsawayfomtheinputterminalsoftheMeter.
MEASURING DC VOLTAGE (see gure 6)
Figure 6.Measuring DC Voltage
Warning
To avoid harm to you or damages to the Meter from electric shock, please do not attempt to
measure voltages higher than 1000V although readings may be obtained.
TheDCVoltagerangesare:6.000V,60.00V,600.0Vand1000V.Ifovertherange,itdisplays”OL”.To
measureDCvoltage,connecttheMeterasfollows:
1. Inserttheredtestleadintothe terminalandtheblacktestleadintotheCOM terminal.
2. Set the rotary switch to
3. Connectthetestleadsacrosswiththeobjectbeingmeasured.Themeasuredvalueshowsonthe
display.
Note:
• Ifthevalueofvoltagetobemeasuredisunknown,settheMetertoautorangingorusethemaximum
measurementposition1000Vandreducetherangestepbystepuntilasatisfactoryreadingisobtained.

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• Ineachrange,theMeterhasaninputimpedanceof10MΩ.Thisloadinge󰀨ectcancause
measurementerrorsinhighimpedancecircuits.Ifthecircuitimpedanceislessthanorequalto10kΩ,the
errorisnegligible(0.1%orless).
• WhenDCvoltagemeasurementhasbeencompleted,disconnecttheconnectionbetweenthetesting
leadsandthecircuitundertest,andremovethetestingleadsawayfromtheinputterminalsoftheMeter.
MEASURING DC MILLIVOLTS (see gure 7)
Figure 7.Measuring DC Millivolts
Warning
To avoid harm to you or damages to the Meter from electric shock, please do not attempt to
measure voltages higher than 500V, otherwise you cannot obtain correct reading.
TheDCMillivoltsrangesare:60.000mVand600.0mV.Ifovertherange,itdisplays“OL”.TomeasureDC
Millivolts,connecttheMeterasfollows:
1. Inserttheredtestleadintothe terminalandtheblacktestleadintotheCOMterminal.
2. Set the rotary switch to
3. Connectthetestleadsacrosswiththeobjectbeingmeasured.
Themeasuredvalueshowsonthedisplay.
Note:
• Themaximuminputimpedanceis4000MΩ.
• WhenDCMillivoltsmeasurementhasbeencompleted,disconnecttheconnectionbetweenthetesting
leadsandthecircuitundertest,andremovethetestingleads

10
MEASURING RESISTANCE AND CAPACITANCE
MEASURING RESISTANCE (see gure 8)
Figure 8. Measuring Resistance
Warning
To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all
high-voltage capacitors before testing resistance.
TheResistancerangesare600.0Ω,6.000kΩ,60.00kΩ,600.0kΩ,6.000MΩand40.00MΩ
Tomeasureresistance,connecttheMeterasfollows:
1. Inserttheredtestleadintothe terminalandtheblacktestleadintotheCOM terminal.
2. Set the rotary switch to Resistance measurement is default or press SELECTbuttontoselectΩ
measurement mode
3. Connectthetestleadsacrosswiththeobjectbeingmeasured.Themeasuredvalueshowsonthe
display.
Note:
• WhenResistancemeasurementhasbeencompleted,disconnecttheconnectionbetweenthetesting
leadsandthecircuitundertest,andremovethetestingleadsawayfromtheinputterminalsoftheMeter.
MEASURING CAPACITANCE (see gure 9)
Figure 9. Measuring Capacitance

11
Warning
To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all
high-voltage capacitors before testing capacitance. Use the DC Voltage function to conrm that the
capacitor is discharged.
TheCapacitancerangesare10.00nF,100.0nF,1000nF,10.00µFand100.0µF
Tomeasurecapacitance,connecttheMeterasfollows:
1. Inserttheredtestleadorredshortleadwithalligatorclipintothe terminalandtheblack
testleadorblackshortleadwithalligatorclipintotheCOMterminal.Ifthecapacitorbeingtestedhaspolarity,
connectthepositiveintotheterminalandthenegativeintotheCOMterminal
2. Set the rotary switch to PressSELECTbuttontoselectcapacitancemeasurementmode
3. Connectthetestleadsacrosswiththeobjectbeingmeasured.Themeasuredvalueshowsonthe
display.
Note:
• WhenCapacitancemeasurementhasbeencompleted,disconnecttheconnectionbetweenthetesting
leadsandthecircuitundertest,andremovethetestingleadsawayfromtheinputterminalsoftheMeter.
TestingforContinuity(seegure10)
Figure 10. Testing for continuity
Warning
To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all
high-voltage capacitors before testing continuity.
Tomeasurecapacitance,connecttheMeterasfollows:
1. Inserttheredtestleadintothe terminalandtheblacktestleadintotheCOM terminal.
2. Set the rotary switch to.
3. Continuousaudibletonefortestresistancebelow30Ω
Note:
• WhenContinuitymeasurementhasbeencompleted,disconnecttheconnectionbetweenthetesting
leadsandthecircuitundertest,andremovethetestingleadsawayfromtheinputterminalsoftheMeter.

12
TESTING DIODES (see gure 11)
Figure 11. Testing Diodes
Warning
To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all
high-voltage capacitors before testing diodes.
Tomeasurediode,connecttheMeterasfollows:
1. Inserttheredtestleadintothe terminalandtheblacktestleadintotheCOMterminal.
2. Set the rotary switch to
3. Forforwardvoltagedropreadingsonanysemiconductorcomponent,placetheredtestleadonthe
component’sanodeandplacetheblacktestleadonthecomponent’scathode.
Themeasuredvalueshowsonthedisplay.
Note:
• Inacircuit,agooddiodeshouldsillproduceaforwardvoltagedropreadingof0.5Vto0.8V;however,
thereverse-voltagedropreadingcanvarydependingontheresistanceofotherpathwaysbetweentheprobe
tips.
• Connectthetestleadstotheproperterminalassaidabovetoavoiderrordisplay.TheLCDwill
displayOLindicatingdiodebeingtestedisopenorpolarityisreversed.
• TheunitofdiodeisVolt(V),displayingtheforwardvoltagedropreadings.
• WhenDiodemeasurementhasbeencompleted,disconnecttheconnectionbetweenthetestingleads
andthecircuitundertest,andremovethetestingleadsawayfrominputterminalsoftheMeter.

13
MEASURING AC OR DC CURRENT (see gure 12)
Figure 12.Measuring AC or DC Current
Warning
To avoid personal injury or damage to the Meter:
• Never attempt to make an in-circuit current measurement when the open-circuit potential to
earth is greater than 600V.
• Inspect Meter’s fuses before testing. Broken fuses may damage to the Meter or hurt
yourselves
• Use the proper terminals, switch position, and range for your measurement.
• Never place the probes in parallel with circuit or component when the leads are plugged into
the current terminals.
Thecurrentrangesare60.00mAand600.0mA.
Tomeasurecurrent,connecttheMeterasfollows:
1. InserttheredtestleadintothemAterminalandtheblacktestleadintotheCOMterminal.
2. SettherotaryswitchtomA DCCurrentisdefault.PressSELECTtotoggletoACcurrent
measurement mode.
3. Connectthetestleadsacrosswiththeobjectbeingmeasured.Themeasuredvalueshowsonthe
display.
4. ACCurrentdisplaysTrueRMSvalue.
Note:
• Ifthevalueofcurrenttobemeasuredisunknown,setTHEMetertoautorangingorusethemaximum
measurementposition600.0mAandreducetherangestepbystepuntilasatisfactoryreadingisobtained.
• Forsafetysake,whenmeasuringhighcurrent,eachmeasurementtimemustbelessthan10seconds
withanintervalmorethan15minutes.
• WhenCurrentmeasurementhasbeencompleted,disconnecttheconnectionbetweenthetesting
leadsandthecircuitundertest,andremovethetestingleadsawayfromtheinputterminalsoftheMeter.

14
MEASURING FREQUENCY (see gure 13)
Figure 13. Measuring Frequency
• PressHzbuttontoselectfrequencymeasurementmodeatm or or .PressHztoexit
frequencymeasurementmodeandreturntothepreviousmeasurementmode.
• Themaximumrangeoffrequencyis1MHz.
• Thesignalattenuationisdi󰀨erentfromdi󰀨erentmeasuringpositionandrange.
Thereforetherequiredsignalinputamplitudeandrangemaybedi󰀨erentfromdi󰀨erentmeasuringposition
andrange.
• Itisrecommendedtousethe rangewhichhashigherinputsensitivity.
• Iftheinputamplitudeishigherthan1Vrms,itisrequiredtouse or . To carry out the
measurement.
• Whenusingcurrentrangetomeasurefrequency,itisrequiredtoinputsignalmorethan30%offull
range.Thereadingobtainedisonlyforreference.
Note:
• WhenFrequencymeasurementhasbeencompleted,disconnecttheconnectionbetweenthetesting
leadsandthecircuitundertest,andremovethetestingleadsawayfromtheinputterminalsoftheMeter.
MEASURING TEMPERATURE (see gure 14)
Figure 14. Measuring Temperature

15
Warning
Toavoidriskofshockdonotconnectthermocoupletoelectricallylivecircuits.
Caution
ToavoidpossibledamagetotheMeterorotherequipment,rememberthatwhiletheMeterisrated
for-40°Cto537°C(-40°Fto998°F),theincludedK-typethermocoupleisratedfor260°C(500°F).For
temperatureoutofthatrange,useahigherratedthermocouple.
Tomeasuretemperature,connecttheMeterasfollows:
1. Inserttheredthermocoupleintothe terminalandtheblackthermocoupleintotheCOM
terminal.
2. SettherotaryswitchtomV.
3. PressSELECTtochoosetemperaturerange.
4. PressRANGEtotogglebetweendegreesCelsius(°C)ordegreesFahrenheit(°F).
5. Placethethermocoupletotheobjectbeingmeasured.
Themeasuredvalueshowsonthedisplay.
TESTING INSULATION (see gure 15)
Figure 15.Testing Insulation
Warning
Make sure the circuit to be tested is dead before taking measurement. Never measure the
insulation resistance of live equipment or circuit. Never touch the circuit after measurement, as the
capacitance to be saved on the circuit may cause electric shock.
Insulation tests should only be performed on dead circuits. Check the fuse before testing.
Tomeasureinsulationresistance,setuptheMeterasshowninFigure15andfollowthestepsbelow:
1. InserttheredshortleadwithalligatorclipintheINSULATIONinputterminalandtheblackshortlead
withalligatorclipinthemA input terminal.
2. Turn the rotary switch to INSULATION position.
3. PressRANGEtoselectthevoltage.
4. Connecttheprobestothecircuittobemeasured.Therearetwomethodstostarttheinsulationtest:
• PressHOLD button to disable LOCKmode.PressandholdTEST to start the insulation test until
TEST button is released
• PressHOLDbuttontoenterLOCKmode.PressTESToncetostarttheinsulationtstuntilpressing
HOLDorTESTagaintoreleaseLOCKmode.
5. PushandholdTESTbuttontostartthetest,thesecondarydisplayshowsthetestvoltageappliedto
thecircuitundertest.ThehighvoltagesymbolalongwithaprimarydisplayshowingtheresistanceinMΩor
GΩ.TheTESTiconappearsonthelowerportionofthedisplay.
6. WhenreleasingtheTESTbutton,LCDwillnotappearTESTicon.Theresistancereadingappearson
theprimarydisplayuntilanewtestisstartedoradi󰀨erentfunctionorrangeisselected.

16
Caution
The following improper operating procedure may force the Meter to power o󰀨 automatically. To
avoid the danger of electric shock and damage to the Meter:
• Replace batteries as soon as battery indicator is on. Initiating high voltage when the battery
indicator is on, which may force the Meter to power o󰀨.
• Must connect the probe to the circuit being measured before initiating high voltage.
• When under high voltage mode, never turn the rotary switch to other position.
• The testing time of small resistor or short circuit cannot exceed 20 seconds.
• At insulation testing mode with testing voltage initiated, auto power o󰀨 feature will be disabled
until un-initiating the testing voltage.
Cleaning
• Periodicallywipethecasewithadampclothandmilddetergent.Donotuseabrasivesorsolvents.
Dirtormoistureintheterminalscana󰀨ectreadings.
• TurntheMetero󰀨whenitisnotinuse.
• DonotuseorstoretheMeterinaplaceofhumidity,hightemperature,explosive,inammableand
strongmagneticeld.
• TheinternalcircuitoftheMetershallnotbealteredatwilltoavoiddamageoftheMeterandany
accident.
REPLACING THE BATTERIES
ReplacethebatteriesasshowninFigure16.Followthestepsbelowtoreplacethebatteries.
Figure 16. Replacing the Fuse and the Battery
Warning
To avoid shock, injury, or damage to the Meter:
• Toavoidfalsereadings,whichcouldleadtopossibleelectricshockorpersonalinjury,replacethe
batteries as soon as the battery indicator appears.
• TurntheMetero󰀨andremovethetestingleadsfromtheterminals.
1. Removethetwoscrewsfromthebatterydoorbyusingastandardscrewdriver.
2. Openthebatterydoor.
3. Removeandreplacethebatteries.
6pcsofAA(AM3/LR6),standardcapacityaround2450mAh.
4. Rejointhecasebottomandbatterycompartment,andreinstallthescrew.

17
REPLACING THE FUSE
ReplacethefuseasshowninFigure16.Followthestepsbelowtoreplacethebatteries.
Warning
To avoid shock, injury, or damage to the Meter:
• Use ONLY fuses with the amperage and voltage specied.
• Turn the Meter o󰀨 and remove the testing leads from the terminals.
1. Removethetwoscrewsfromthebatterydoor,twoscrewsfromthecasebottom,onescrewattheback
of the battery.
2. Openthebatterydoorandthecasebottom
3. Removethefusebygentlypryingoneendloose,andtakeoutthefusefromitsbracket.
4. InstallONLYreplacementfuseswithidenticalamperageandvoltagespecied:F1A240V
5. Rejoin the battery door and the case bottom, and reinstall the screws.
6. DonotoperatetheMeterwiththecaseopened.
Replacementofthefuseisseldomrequired.Buringofafusealwaysresultsfromimproperoperation.
SPECIFICATIONS
Table 6. General Specications
Maximum Voltage applied to any Terminal  1000Vrms
mA Input Terminal 1A/240VFastFuse,HighbreakingcapacityFuse
Maximum Display 6000, Updates 5 times per second
Operating Temperature 0°C~40°C(32°F~104°F)
Storage Temperture -10°C~50°C(14°F~122°F)
Relative Humidity ≤75%@0°Ctobelow31°C
≤50%@31°Ctoabove40°C
Altitude Operating:2000meter
Storage:10000meter
Batteries SixAA1.5VbatteriesAM3/LR6(standardcapacity
around2450mAh)
Low battery LCDdisplay
Auto Power O󰀨 TheMeterwillbeautomaticallyo󰀨whentheMeteris
not in use for more than 15 minutes
Size 97mmx202mmx46mm
Weight Around505g(includingbatteries)
ELECTRICAL SPECIFICATIONS
Accuracy:±(a%ofrdg+bdigits),guaranteefor1year.
OperatingTemperature:23°C±5°C
RelativeHumidity:<75%
AC VOLTAGE MEASUREMENT
Range Resolution Accuracy Input Protection
50Hz~60Hz 60Hz~1kHz
6.000V 1mV
±(1%+3) ±(2%+3)
1000V
60.00V 10mV
600.0V 100mV ±(2%+6)
1000V 1V ±(2%+3)

Remarks:
• ImputImpedance:≥10MΩ
• Displayse󰀨ectivevalueofsinewave
• FrequencyResponse:50Hz~1kHz
DC VOLTAGE MEASUREMENT
Range Resolution Accuracy Input Protection
6.000V
1mV
±(0.3%+4) 1000V
60.00V 10mV
600.0V 100mV
1000V 1V
Remark:
• InputImpedance:≥10MΩ
DC MILLIVOLTS MEAUREMENT
Range Resolution Accuracy Input Protection
60.00mV 10µV ±(0.4%+4) 600Vp
600.0mV 100µV
Remark:
• InputImpedance:≥4000MΩ
AC CURRENT MEASUREMENT
Range Resolution Accuracy Input Protection
60.00mA 10µA ±(1.5%+2) Fuse,Fast,1A,240V
600.0mA 100µA
Remark:
• DisplaysTrueRMSvalue.
• FrequencyResponse50Hz~1kHz
DC CURRENT MEASUREMENT
Range Resolution Accuracy Input Protection
60.00mA 10µA ±(1.0%+2) Fuse,Fast,1A,240V
600.0mA 100µA
OHMS MEASUREMENT
Range Resolution Accuracy Input Protection
600.0Ω 0.1Ω
±(0.9%+2) 600Vp
6.000kΩ 1Ω
60.00kΩ 10Ω
600.0kΩ 100Ω
6.000MΩ 1kΩ
40.000MΩ 10kΩ ±(1.5%+3)

19
CAPACITANCE MEASUREMENT
Range Resolution Accuracy Input Protection
10.00nF 10pF
±(3%+5) 600Vp
100.0nF 100pF
1000nF 1nF
10.00µF 10nF
100.0µF 100nF
DIODE TEST
• Resolution:  1mV
• InputProtection: 500Vp
• Opencircuitvoltage: around3V
• Displayapproximateforwardvoltagedropnearestvalue
CONTINUITY TEST
• ContinuityIndication: Continuousaudibletonefortestresistancebelow30Ω
• OpenCircuitVoltage: around3V
• InputProtection: 500Vp
• Resolution:  0.1Ω
TEMPERATURE MEASUREMENT
Range Resolution Accuracy Input Protection
-40°C~537°C 1°C ±(1%+10) 600Vp
-40°F~998°F 2°F ±(1%+18)
FREQUENCY MEASUREMENT
• AtmV Range
Range Resolution Accuracy Input Protection
60.00Hz 0.01Hz
±(0.1%+3) 600Vp
600.0Hz 0.1Hz
6.000kHz 1Hz
60.00kHz 10Hz
600.0kHz 100Hz
1.000MHz 1kHz
Remark:
• InputSensitivity:
≤When100kHz: ≤100mVrms
   ≥30mVrms
>When100kHz: ≥100mVrms
   ≤30Vrms

20
AT DCV/ACV RANGE
Range Accuracy Input Protection
10Hz~100kHz ±(0.1%+3) 600Vp
Remark:
• Inputamplitude:≥600mVrms
INSULATION SPECIFICATIONS
Testing Voltages Measurement
Range Resolution Accuracy
50V
(0%to10%) 0.1MΩ~50.0MΩ 0.1MΩ
±(3%+5)
100V
(0%to10%) 0.1~100.0MΩ 0.1MΩ
100V
(0%to10%)
0.2MΩ~99.9MΩ 0.1MΩ
100MΩ~250MΩ 1MΩ
500V
(0%to20%)
0.5MΩ~99.9MΩ 0.1MΩ
100MΩ~500MΩ 1MΩ
1000V
(0%to20%)
4.0MΩ~99.9MΩ 0.1MΩ
100MΩ~999MΩ 1MΩ
1.00GΩ~2.00GΩ 10MΩ ±(5%+5)
Remark:
• Short-CircuitTestCurrentlessthan2.0mA.
NOTES
IMPORTANT!
Themakerwillnottakeresponsibilityfordamageormalfunctionasaresultofthedevicebeingincorrectly
used or, applied for a purpose for whith it was not intended.
AccordingtoWasteElectricalandElectronicEquipmentdirective(WEEE),theseonesmustbe
collectedandarrangedseparately.Ifyouhavetothrowthemout,please,donotusetheusualrubbish.Please,
contactyourdistributorforfreerecycling.
GUARANTEE
Themakerguaranteestothedeviceowner12monthsagainstanymanufacturedefect.
Thisguaranteedonotcoverthepartswichareconsumables.
Note: to apply the guarantee its necesary to send the “GUARANTEE CERTIFICATE” duly lled within one
week after purchased the machine to the maker.