EGAmaster 51251 User manual

INSULATION RESISTANCE

MULTIMETER

OPERATING INSTRUCTIONS

GUARANTEE...........................23

COD. 51251

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.

• 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.

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

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

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

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

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.

• 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

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

Table of contents

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