Extech Instruments MN62 User manual

USERGUIDE
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
TrueRMSDigitalMultimeter
WithNon‐ContactVoltageDetectorandLowPassFilter
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ModelMN62

MN62‐en‐GB_V1.112/15
2
Introduction
ThankyouforselectingtheModelMN62TrueRMSAuto‐rangingMultimeter.Thismetermeasures
AC/DCVoltage,AC/DCCurrent,VariableFrequencyVoltage(VFC),Resistance,Capacitance,
Frequency,DutyCycle(AConly),DiodeTest,andContinuity;aNon‐ContactVoltageDetectoris
alsobuilt‐in.Thisdeviceisshippedfullytestedandcalibratedand,withproperuse,willprovide
yearsofreliableservice.Pleasevisitourwebsite(www.extech.com)tocheckforthelatestversion
ofthisUserGuide,ProductUpdates,ProductRegistration,andCustomerSupport.

Features
TrueRMSACMeasurements
Non‐contactVoltageDetector
4000CountMultifunctionLCDDisplay
AutomaticandManualRanging
MAX‐MINReadingMemory
RelativeMode
DataHold
VariableFrequencyVoltagemode(VFC)offerslowpassfilter
AutomaticPowerOFF(APO)
Rugged,BatteryOperated,andPortable
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MN62‐en‐GB_V1.112/15
3
Safety
TheMN62isdesignedincompliancewithstandardssuchasIEC/EN61010‐1,pollutiongradeII,
overvoltageCATIII600Vanddoubleinsulationstandards.Pleasecomplywiththeinstructions
providedinthisguideotherwisetheprotectionprovidedbytheinstrumentmaybeaffected.
Thissymboladjacenttoanothersymbol,terminaloroperatingdeviceindicates
thattheoperatormustrefertoanexplanationintheOperatingInstructionsto
avoidpersonalinjuryordamagetothemeter.
ThisWARNINGsymbolindicatesapotentiallyhazardoussituation,whichifnot
avoided,couldresultindeathorseriousinjury.
ThisCAUTIONsymbolindicatesapotentiallyhazardoussituation,whichifnot
avoided,mayresultdamagetotheproduct.
Thissymboladvisestheuserthattheterminal(s)somarkedmustnotbe
connectedtoacircuitpointatwhichthevoltagewithrespecttoearthground
exceeds(inthiscase)600VACrmsorDC.
Thissymboladjacenttooneormoreterminalsidentifiesthemasbeing
associatedwithrangesthatmay,innormaluse,besubjectedtoparticularly
hazardousvoltages.Formaximumsafety,themeteranditstestleadsshould
notbehandledwhentheseterminalsareenergized.
Thissymbolindicatesthatadeviceisprotectedthroughoutbydouble
insulationorreinforcedinsulation.

PERIEC1010OVERVOLTAGEINSTALLATIONCATEGORY
OVERVOLTAGECATEGORYI
EquipmentofOVERVOLTAGECATEGORYIisequipmentforconnectiontocircuitsinwhich
measuresaretakentolimitthetransientovervoltagestoanappropriatelowlevel.
Note–Examplesincludeprotectedelectroniccircuits.
OVERVOLTAGECATEGORYII
EquipmentofOVERVOLTAGECATEGORYIIisenergy‐consumingequipmenttobesuppliedfrom
thefixedinstallation.
Note–Examplesincludehousehold,office,andlaboratoryappliances.
OVERVOLTAGECATEGORYIII
EquipmentofOVERVOLTAGECATEGORYIIIisequipmentinfixedinstallations.
Note–Examplesincludeswitchesinthefixedinstallationandsomeequipmentforindustrialuse
withpermanentconnectiontothefixedinstallation.
OVERVOLTAGECATEGORYIV
EquipmentofOVERVOLTAGECATEGORYIVisforuseattheoriginoftheinstallation.
Note–Examplesincludeelectricitymetersandprimaryover‐currentprotectionequipment
WARNING
CAUTION
MAX
600V

MN62‐en‐GB_V1.112/15
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CAUTIONS
Improperuseofthismetercancausedamage,shock,injuryordeath.Readandunderstandthisuser
manualbeforeoperatingthemeter.
Alwaysremovethetestleadsbeforereplacingthebatteryorfuses.
Inspecttheconditionofthetestleadsandthemeteritselfforanydamagebeforeoperatingthemeter.
Usegreatcarewhenmakingmeasurementsifthevoltagesaregreaterthan30VACrmsor60VDC.These
voltagesareconsideredashockhazard.
AlwaysdischargecapacitorsandremovepowerfromthedeviceundertestbeforeperformingDiode,
ResistanceorContinuitytests.
Voltagechecksonelectricaloutletscanbedifficultandmisleadingbecauseoftheuncertaintyof
connectiontotherecessedelectricalcontacts.Othermeansshouldbeusedtoensurethattheterminals
arenot"live".
Iftheequipmentisusedinamannernotspecifiedbythemanufacturer,theprotectionprovidedbythe
equipmentmaybeimpaired.
Thisdeviceisnotatoyandmustnotreachchildren’shands.Itcontainshazardousobjectsaswellassmall
partsthatthechildrencouldswallow.
Incasethedeviceisgoingtobeunusedforanextendedperiodoftime,removethebatteriesandstore
themseparately.
Expiredordamagedbatteriescancausecauterizationoncontactwiththeskin.Useprotectivegloves
whenhandling.
Donotshort‐circuitthebatteries.Donotthrowbatteriesintoafire.
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Thismeterhasbeendesignedforsafeuse,butmustbeoperatedwithcaution.Theruleslistedbelowmust
becarefullyfollowedforsafeoperation.

1. NEVERapplyvoltageorcurrenttothemeterthatexceedsthespecifiedmaximum:
InputProtectionLimits
FunctionMaximumInput
VDCorVAC600VDC/ACrms
µA/mAAC/DC500mA600Vfastactingfuse
AAC/DC10A600Vfastactingfuse
Frequency,Resistance,Capacitance,DutyCycle,
DiodeTest,Continuity
600VDC/ACrms
2. USEEXTREMECAUTIONwhenworkingwithhighvoltages.
3. DONOTmeasurevoltageifthevoltageonthe"COM"inputjackexceeds600Vaboveearthground.
4. NEVERconnectthemeterleadsacrossavoltagesourcewhilethefunctionswitchisinthecurrent,
resistance,ordiodemode.Doingsocandamagethemeter.
5. ALWAYSdischargefiltercapacitorsinpowersuppliesanddisconnectthepowerwhenmakingresistance
ordiodetests.
6. ALWAYSturnoffthepoweranddisconnectthetestleadsbeforeopeningthecoverstoreplacethefuse
orbatteries.
7. NEVERoperatethemeterunlessthebackcoverandthebatteryandfusecoversareinplaceandfastened
securely.
8. NEVERchangethemeasurementfunctionbyturningthefunctiondialwhiletesting.
9. Iftheequipmentisusedinamannernotspecifiedbythemanufacturer,theprotectionprovidedbythe
equipmentmaybeimpaired.

MN62‐en‐GB_V1.112/15
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MeterDescription
1. Non‐ContactVoltageDetectorLEDlamp
2. LCDDisplay
3. MAX‐MIN
4. RANGEbutton
5. HOLD‐Backlightbutton
6. Functionswitch
7. ‘A’probeinputjack
8. ‘mAµA’probeinputjack
9. COM(‐)inputjack
10. Positive(+)inputjack
11. SELECT‐VariableFrequencyControlbutton
12. HZ‐%button
13. REL(Relative)button

Note:Tiltstand,testleadholders,andbattery/fusecompartmentareonrearofunit.

ButtonDescriptions
RANGEbutton
ThedefaultmodeisAutoRange.Tomanuallyrange,pressRANGEtostepthroughtheranges.
PressandholdRANGEtoreturntoAutoRangemode.AutoRangeisdisplayedinAutomode.
MAX‐MINbutton
PresstoactivatetheMAX/MINrecordingmode(MAXwillappear).Themeterwilldisplayand
holdthemaximumreading.Pressagain(MINwillappear).Themeterwilldisplayandholdthe
minimumreading.Toexit,pressandholdMAX‐MINfor2seconds.
REL(Relative)button
Thedisplayedvalue,atthetimeofthebuttonpress,becomestheReferencevaluewithwhich
subsequentreadingsarecompared.SeededicatedRelativemodesection.
HOLDandBacklightbutton
Shortpresstofreezedisplayedreading(Hiconisvisible).Pressagaintoreleasereading.
PressandholdtoswitchbacklightONorOFF.
Hz‐%button
Frequency(Hz)andDutyCycle(%)modes.AvailableonlyintheACVoltage/Currentand
Frequencymodes.
SELECT‐VFCbutton
ShortpressesselectACorDCforvoltageandcurrentmeasurements.
InACVoltageVFCmode,pressandholdtoaccessVFC(VariableFrequencyControl)wherea
lowpassfilterisemployedformeasuringthevoltageofavariablefrequency/speeddrive.
1
2
3
4
5
6
7
89
10
11
12
13

MN62‐en‐GB_V1.112/15
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DisplayDescription
1
2
3
4
5
6
78910 11
12
14
15
16
17
18
19
20
21 13
VFC
22

1. Relativemode
2. Seeunitsprefixlistbelow
3. Ohms(Resistance)
4. Hertz(Frequency)
5. Seeunitsprefixlistbelow
6. Voltage
7. Seeunitsprefixlistbelow
8. Amperes(Amps)Current
9. Farads(Capacitance)
10. Percent(%)dutycycle(forAConly)
11. Batterystatusicon
12. APO(AutoPowerOFF)active
13. Measurementreadingdigits
14. Non‐contactvoltagedetector(displaysEFinreadingarea)
15. AutoRangeisshowninAutoRangemode
16. MAX‐MINmemoryactive
17. DataHoldactive
18. Continuitytest(Resistance)
19. Diodetest
20. Minus(negative)sign
21. AC(alternatingcurrent)orDC(directcurrent)mode
22. VFC(lowpassfilter)VariableFrequencyControl
Measurementunitprefixes
nnano(10‐9)(capacitance)
µmicro(10‐6)(amps,cap)
mmilli(10‐3)(volts,amps)
kkilo(103)(ohms)
Mmega(106)(ohms)

MN62‐en‐GB_V1.112/15
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OperatingInstructions
WARNING:Riskofelectrocution.High‐voltagecircuits,bothACandDC,areverydangerousandshouldbe
measuredwithgreatcare.
1. ALWAYSturnthefunctionswitchtotheOFFpositionwhenthemeterisnotinuse.
2. IfOLappearsinthedisplayduringameasurement,thevalueexceedstheselectedrange.
Changetoahigherrange.
3. Ifthemeterdoesnotswitchonwhenthefunctiondialisturnedtoanypositionotherthan
OFF,pleasecheckthebatteries.RefertotheBatteryInstallationsectionofthisguide.
AUTOPOWEROFF(APO)
TheAPOfeatureturnsthemeteroffafter15minutesofinactivity.TodisableAPO,holdthe
SELECTbuttonwhileturningthemeteron.Themeterwillemit5beepsindicatingthatAPOhas
beendisabled(theAPOclockiconwillnotbevisibleonthedisplay).Turnthemeteroffandthen
onagaintore‐enableAPO(theAPOclockiconwillbevisibleonthedisplaywhenAPOisactive).
AUTOMATICandMANUALRange
ThemeterdefaultstoAUTORangemodewhenitisswitchedON.Inthismodethemeter
automaticallyselectsthebestrangeforthemeasurementsbeingmadeandisgenerallythebest
modeformostmeasurements.Formeasurementsituationsrequiringthatarangebemanually
selected,performthefollowing:
1. PresstheRANGEbutton.The“AUTORANGE”displayindicatorwillturnoff.
2. PresstheRANGEbuttontostepthroughtheavailableranges.
3. ToexittheManualRangingmodeandreturntoAutoranging,pressandholdtheRANGE
buttonfor2seconds.
MAX/MINMemory
1. PresstheMAX/MINbuttontoactivatetheMAX/MINrecordingmode.ThedisplayiconMAX
willappear.Themeterwilldisplayandholdthemaximumreadingandwillupdateonlywhen
anewmaximumreadingoccurs.
2. PresstheMAX/MINbuttonagainandthedisplayiconMINwillappear.Themeterwill
displayandholdtheminimumreadingandwillupdateonlywhenanewminimumreading
occurs.
3. ToexitMAX/MINmodepressandholdtheMAX/MINbuttonfor2seconds.
Relativemode
Therelativemeasurementfeatureallowstheusertomakemeasurementsrelativetoastored
referencevalue.Areferencevoltage,current,etc.canbestoredwheresubsequent
measurementscanbemadeincomparisontothatstoredreferencevalue.Thedisplayedvalueis
thedifferencebetweenthereferencevalueandthemeasuredvalue.
1. Performameasurementasdescribedintheoperatinginstructions.
2. PresstheRELbuttontostorethereading;theRelativeindicator willappearonthedisplay.
3. Thedisplaywillnowindicatethedifferencebetweenthestoredandmeasuredvalue.
4. PresstheRELbuttontoexittherelativemode.TheRelativeindicatorwillswitchOFF.

MN62‐en‐GB_V1.112/15
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DisplayBacklight
Pressandholdthe buttontoturnthebacklightON/OFF.Thebacklightwillautomaticallyturn
offafter30seconds.
DataHold
TheDataHoldfunctionfreezesthereadinginthedisplay.PresstheHOLDbuttontoswitchData
HoldON/OFF.WhentheDataHoldmodeisactivethedisplaywillshowtheHicon.
DCVOLTAGEMEASUREMENTS
CAUTION:DonotmeasureDCvoltagesifamotoronthecircuitisbeingswitchedONorOFF.Largevoltage
surgesmayoccurthatcandamagethemeter.
1. SetthefunctionswitchtotheVposition.
2. PresstheSELECTbuttontoswitchtoDCifnecessary.
3. InserttheblacktestleadbananaplugintothenegativeCOMjack.
InserttheredtestleadbananaplugintothepositiveVjack.
4. Touchtheblacktestprobetiptothenegativesideofthecircuit.
Touchtheredtestprobetiptothepositivesideofthecircuit.
5. UsetheRANGEbuttontomanuallyrangethereading.Pressand
holdtheRANGEbuttontoreturntoAutoRangeMode.Readthe
voltageinthedisplay.

ACVOLTAGEMEASUREMENTS
WARNING:RiskofElectrocution.Theprobetipsmaynotbelongenoughtocontactthelivepartsinside
some240Voutletsforappliancesbecausethecontactsarerecesseddeepintheoutlets.Asaresult,the
readingmayshow0voltswhentheoutletactuallyhasvoltageonit.Makesuretheprobetipsaretouching
themetalcontactsinsidetheoutletbeforeassumingthatnovoltageispresent.

CAUTION:DonotmeasureACvoltagesifamotoronthecircuitisbeingswitchedONorOFF.Largevoltage
surgesmayoccurthatcandamagethemeter.
1. SetthefunctionswitchtotheVposition.
2. PresstheSELECTbuttontoswitchtoACifnecessary.
3. InserttheblacktestleadbananaplugintothenegativeCOMjack.
InsertredtestleadbananaplugintothepositiveVjack.
4. Touchtheblacktestprobetiptotheneutralsideofthecircuit.
Touchtheredtestprobetiptothe“hot”sideofthecircuit.
5. Readthevoltageinthedisplay.
6. UsetheRANGEbuttontomanuallyrangethereading.Pressand
holdtheRANGEbuttontoreturntoAutoRangeMode.

MN62‐en‐GB_V1.112/15
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ACVOLTAGEMEASUREMENTSwithVFC,Hz,and%DutyCycle
WARNING:RiskofElectrocution.Theprobetipsmaynotbelongenoughtocontactthelivepartsinside
some240Voutletsforappliancesbecausethecontactsarerecesseddeepintheoutlets.Asaresult,the
readingmayshow0voltswhentheoutletactuallyhasvoltageonit.Makesuretheprobetipsaretouching
themetalcontactsinsidetheoutletbeforeassumingthatnovoltageispresent.

CAUTION:DonotmeasureACvoltagesifamotoronthecircuitisbeingswitchedONorOFF.Largevoltage
surgesmayoccurthatcandamagethemeter.
1. SetthefunctionswitchtotheVFCposition.
2. InserttheblacktestleadbananaplugintothenegativeCOMjack.
InsertredtestleadbananaplugintothepositiveVjack.
3. PressandholdtheVFCbuttonuntilthemeterbeepsandVFCis
brieflydisplayed.Themeterisnowapplyingalowpassfilter(Note:
VFCisVariableFrequencyControl).PressandholdtheVFCbutton
againtoexittheVFCmode(ENDwillbrieflydisplay).
4. Touchtheblacktestprobetiptotheneutralsideofthecircuit.
Touchtheredtestprobetiptothe“hot”sideofthecircuit.
5. Readthevoltageinthedisplay.
6. PresstheHz/%buttontoindicateHz.
7. Readthefrequencyinthedisplay.
8. PresstheHz/%buttonagaintoindicate%.
9. Readthe%dutycycleinthedisplay.
%DutyCycleNote:DutyCyclemeasurementsareAConlyforthismeter.Measurement
signalsmustbe‘zerocrossing’andmustreach‐0.7VforthemetertoproperlydisplayDuty
Cycle%.

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DC/ACMILLIVOLTMEASUREMENTS
CAUTION:DonotmeasureDC/ACvoltagesifamotoronthecircuitisbeingswitchedONor
OFF.Largevoltagesurgesmayoccurthatcandamagethemeter.
1. SetthefunctionswitchtothemVposition.
2. InserttheblacktestleadbananaplugintothenegativeCOMjack.
InserttheredtestleadbananaplugintothepositiveVjack.
3. PresstheSELECTbuttontoselectDCorACmillivolts.
4. Touchtheblacktestprobetiptothenegativesideofthecircuit.
Touchtheredtestprobetiptothepositivesideofthecircuit.
(FigureatrightshowsDCmeasurementonly).
5. Readthevoltageinthedisplay.
6. ForAC,presstheHz/%buttontoindicateHz.
7. Readthefrequencyinthedisplay.
8. ForAC,presstheHz/%buttonagaintoindicate%.
9. Readthe%dutycycleinthedisplay.
DCCURRENTMEASUREMENTS
CAUTION:Donotmake5Acurrentmeasurementsforlongerthan30seconds.Allow15
minutesbetweentests.Exceeding30secondsmaycausedamagetothemeterand/orthetest
leads.
1. InsertblacktestleadbananaplugintothenegativeCOM
jack.
2. Forcurrentmeasurementsupto6000µADC,setthe
functionswitchtotheµApositionandinserttheredtest
leadbananaplugintotheµA/mAjack.
3. Forcurrentmeasurementsupto600mADC,setthefunction
switchtothemApositionandinserttheredtestlead
bananaplugintotheµA/mAjack.
4. Forcurrentmeasurementsupto10ADC,setthefunction
switchtotheApositionandinserttheredtestleadbanana
plugintothe10Ajack.
5. PresstheSELECTbuttontoindicateDConthedisplay.
6. Removepowerfromthecircuitundertest,thenopenupthe
circuitatthepointwhereyouwishtomeasurecurrent.
7. Touchtheblacktestprobetiptothenegativesideofthecircuit.Touchtheredtestprobe
tiptothepositivesideofthecircuit.
8. Applypowertothecircuit.
9. Readthecurrentinthedisplay.