Extech Instruments MiniTec Series User manual

USERMANUAL
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MiniTecTMSeries
ManualRangingMiniMultiMeter
ModelMN35
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MN35-EU-EN V2.3 4/13
2
Introduction
CongratulationsonyourpurchaseofExtech’sMN35ManualRangingMultimeter.Thismeter
measuresAC/DCVoltage,DCCurrent,Resistance,Temperature,BatteryTest,DiodeTestand
Continuity.Thismeter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,andCustomerSupport.
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Safety
InternationalSafetySymbols
Thissymbol,adjacenttoanothersymbolorterminal,indicatestheusermustrefertothe
manualforfurtherinformation.
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Thissymbol,adjacenttoaterminal,indicatesthat,undernormaluse,hazardousvoltages
maybepresent
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Doubleinsulation
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SafetyPrecautions
1. Improperuseofthismetercancausedamage,shock,injuryordeath.Readandunderstandthis
usermanualbeforeoperatingthemeter.
2. Makesureanycoversorbatterydoorsareproperlyclosedandured.
3. Alwaysremovethetestleadsbeforereplacingthebatteryorfuses.
4. Inspecttheconditionofthetestleadsandthemeteritselfforanydamagebeforeoperatingthe
meter.Repairanydamagebeforeuse.
5. Donotexceedthemaximumratedinputlimits.
6. Usegreatcarewhenmakingmeasurementsifthevoltagesaregreaterthan25VACrmsor
35VDC.Thesevoltagesareconsideredashockhazard.
7. Alwaysdischargecapacitorsandremovepowerfromthedeviceundertestbeforeperforming
Diode,ResistanceorContinuitytests.
8. Removethebatteryfromthemeterifthemeteristobestoredforlongperiods.
9. Toavoidelectricshock,donotmeasureACcurrentofanykind
InputLimits
FunctionMaximumInput
VDC,VAC600VDC/AC
Resistance,Diode,Continuity500VDC/AC
mADC250mADC
10ADC10ADC(15sec.maxevery15min.)
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MN35-EU-EN V2.3 4/13
3
MeterDescription
1. LCDDisplay
2. Holdbutton
3. Functionswitch
4. COMjack
5. 10Ajack
6. Positivejack
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Note:Tiltstandandbattery
accessisontherearofunit.
OperatingInstructions
Note:If“H”andablankscreenappearwhenthemeteristurnedontheHOLDfeatureisactive.
PresstheHOLDbuttontoexittheHOLDmode.
ACorDCVoltageMeasurements
1. InserttheblacktestleadbananaplugintothenegativeCOMjackandtheredtestleadbanana
plugintothepositiveVjack.
2. TurntherotaryswitchtothehighestVACorVDCposition.
3. Touchthetestprobestothecircuitundertestandreadthevoltageonthedisplay.
4. Resetthefunctionswitchtosuccessivelylowerpositionstoobtainahigherresolutionreading.If
thepolarityisreversed(DCvoltageonly),thedisplaywillshow(‐)minusbeforethevalue.
DCCurrentMeasurements
CAUTION:Donotmakecurrentmeasurementsonthe10Ascaleforlongerthan15seconds
followedbya15minutecooldownperiod.Exceeding15secondsmaycausedamagetothe
meterand/orthetestleads.
1. InserttheblacktestleadbananaplugintothenegativeCOMjack.
2. Forcurrentmeasurementsupto200mADC,setthefunctionswitchtothe200mADCposition
andinserttheredtestleadbananaplugintotheV//mAjack.
3. Forcurrentmeasurementsupto10ADC,setthefunctionswitchtothe10ADCrangeandinsert
theredtestleadbananaplugintothe10Ajack.
4. Removepowerfromthecircuitundertest,thenopenupthecircuitatthepointwhereyouwish
tomeasurecurrent.
5. 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.
6. Applypowertothecircuit.
7. Readthecurrentinthedisplay.

MN35-EU-EN V2.3 4/13
4
ResistanceMeasurements
1. InserttheblacktestleadbananaplugintothenegativeCOMjackandtheredtestleadbanana
plugintothepositiveV//mAjack.
2. Setthefunctionswitchtothehighestposition.
3. Touchthetestprobetipsacrossthecircuitorpartundertest.Itisbesttodisconnectonesideof
thepartundertestsotherestofthecircuitwillnotinterferewiththeresistancereading.
4. Readtheresistanceinthedisplayandthensetthefunctionswitchtothelowestpositionthatis
greaterthantheactualoranyanticipatedresistance.
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TemperatureMeasurements
WARNING:Toavoidelectricshock,disconnecttestleadsfromanysourceofvoltagebefore
makingatemperaturemeasurement.Besurethatthethermocouplehasbeenremovedbefore
changingtoanyothermeasurementfunction.
1. InsertthetypeKthermocoupleprobeintotheV//mAandCOMjacks.
2. TurntherotaryswitchtotheoForoCposition.
3. Readthetemperatureonthedisplay.
ContinuityMeasurements
1. InserttheblacktestleadbananaplugintothenegativeCOMjackandtheredtestleadbanana
plugintothepositiveV//mAjack.Observepolarity.
2. Turntherotaryswitchtothe•)))position.
3. Touchthetestprobestothecircuitordeviceundertest.Iftheresistanceislessthan
approximately40thebuzzerwillsound.
DiodeMeasurements
1. InserttheblacktestleadbananaplugintothenegativeCOMjackandtheredtestleadbanana
plugintothepositiveV//mAjack.
2. Turntherotaryswitchtothe•)))position.
3. Touchthetestprobestothediodeundertest.Forwardvoltagewillindicate0.4Vto0.7V.
Reversevoltagewillindicate“1.”.Shorteddeviceswillindicatenear0mVandanopendevice
willindicate“1.”inbothpolarities.
BatteryTest
1. InserttheblacktestleadbananaplugintothenegativeCOMjackandtheredtestleadbanana
plugintothepositiveVjack.
2. Turntherotaryswitchtothe1.5Vor9VBATposition.
3. Connecttheredtestleadtothepositivesideofthe1.5Vor9Vbatteryandtheblacktestleadto
thenegativesideofthe1.5Vor9Vbattery.
4. Readthevoltageinthedisplay.
GoodWeakBad
9Vbattery:>8.2V7.2to8.2V<7.2V
1.5Vbattery:>1.35V1.22to1.35V<1.22V
DataHold
PresstheHoldbuttontofreezethereadinginthedisplay.“H”willappearintheLCD.Pressthe
keyagaintoreleasethedisplay.

MN35-EU-EN V2.3 4/13
5
Maintenance
WARNING:Toavoidelectricshock,disconnectthetestleadsfromanysourceofvoltage
beforeremovingthebattery/fusecover.
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WARNING:Toavoidelectricshock,donotoperateyourmeteruntilthebattery/fusecoverisin
placeandfastenedsecurely.
ThisMultimeterisdesignedtoprovideyearsofdependableservice,ifthefollowingcare
instructionsareperformed.
1. Keepthemeterdry.
2. Useandstorethemeterinmildambientconditions.Temperatureextremescanshortenthelife
oftheelectronicpartsanddistortormeltplasticparts.
3. Handlethemetergently.Droppingitcandamagetheelectronicpartsorthecase.
4. Keepthemeterclean.Wipethecaseoccasionallywithadampcloth.DONOTusechemicals,
cleaningsolventsordetergents.
5. Useonlyfreshbatteriesoftherecommendedsizeandtype.Removeoldorweakbatteriesso
theydonotleakanddamagetheunit.
6. Ifthemeteristobestoredforalongperiodoftime,thebatteriesshouldberemovedtoprevent
damagetotheunit.

MN35-EU-EN V2.3 4/13
6
BatteryReplacement
WARNING:Toavoidelectricshock,disconnectthetestleadsfromanysourceofvoltage
beforeremovingthebattery/fusecover.
1. Disconnectthetestleadsfromthemeter.
2. Removetherubberholster(ifinplace).
3. RemovethetwoscrewssecuringtherearcoverusingaPhillipsheadscrewdriver.
4. Liftthecoveroffandreplacethebatteryobservingthecorrectpolarity.
5. Insertthenewbatteryintothebatteryholder.
6. Replacetherearcoverandsecurewiththescrews.

Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.
Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate
collectionsites,theretailstorewherethebatterieswerepurchased,orwherever
batteriesaresold.
Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuseris
obligatedtotakeend‐of‐lifedevicestoadesignatedcollectionpointforthedisposal
ofelectricalandelectronicequipment.

OtherBatterySafetyReminders
oNeverdisposeofbatteriesinafire.Batteriesmayexplodeorleak.
oNevermixbatterytypes.Alwaysinstallnewbatteriesofthesametype.
FuseReplacement
WARNING:Toavoidelectricshock,disconnectthetestleadsfromanysourceofvoltage
beforeremovingbattery/fusecover.
1. Disconnectthetestleadsfromanycircuitbeingmeasured.
2. Removetherubberholster(ifinplace).
3. RemovethetwoscrewssecuringtherearcoverusingaPhillipsheadscrewdriver.Removethe
rearcover.
4. Removetheoldfusebygentlypullinguponit.
5. Installthenewfusebygentlypushingitintotheholder.
6. Alwaysuseafuseofthepropersizeandvalue;250mA/250Vfastblow.
7. Replacetherearcoverandsecurewiththescrews.



MN35-EU-EN V2.3 4/13
7
Specifications
FunctionRangeAccuracy
200.0mV
2.000V
20.00V
200.0V
(0.5%reading+2digits)
DCVoltage(VDC)
600V(0.8%reading+2digits)
200.0VACVoltage(VAC)
(40‐400Hz)600V
(1.2%reading+10digits)
200.0mA(1.5%reading+2digits) DCCurrent(ADC)
10.00A(3.0%reading+5digits)
200.0(0.8%reading+4digits)
2.000k
20.00k
200.0k
(0.8%reading+2digits)
Resistance
20.00M(3.0%reading+3digits)
TempF




TempC

‐4to1400F




‐20to750C
‐4to59°F;(2.5%reading+19digits)
60to750°F(1.0%reading+9digits)
751;to1400°F;(2.5%reading+19digits)

‐20to16C;(2.5%reading+10digits)
17to400C;(1.0%reading+5digits),
400to750C;(2.5%reading+10digits)
(probeaccuracynotincluded)
AccuracyStatedat23oC5oC(73oF10oF)andlessthan70%RH
DiodeTestTestcurrentof1mAmaximum,opencircuitvoltage2.8VDCtypical
ContinuityCheckAudiblesignalwillsoundiftheresistanceislessthanapproximately<405
TemperaturesensorRequirestypeKthermocouple
InputImpedance10M(VDC)and4.5M(VAC)
Display1999countLCD
Overrange“1or‐1”isdisplayed
PolarityAutomatic(noindicationforpositivepolarity);Minus(‐)signfornegative
polarity.
MeasurementRate3timespersecond,nominal
LowBattery“”isdisplayedifbatteryvoltagedropsbelowoperatingvoltage
BatteriesRequiresone9Vbattery(NEDA1604orequivalent)
Fuses mArange;250mA/250Vfastblow
10Arange,noprotection
OperatingTemp0oCto40oC(32oFto104oF)
StorageTemp‐20oCto60oC(‐4oFto140oF)

MN35-EU-EN V2.3 4/13
8
RelativeHumidityMaximumrelativehumidity80%fortemperaturesupto31°Cdecreasinglinearly
to50%relativehumidityat40°C.
OperatingAltitude2000meters(7000ft)maximum.
Weight 153g(5.4oz.)
Size 138mmx72mmx38mm(5.43”x2.83”x1.5”)
SafetyForindooruseandinaccordancewithOvervoltageCategoryII,PollutionDegree
2.CategoryIIincludeslocallevel,appliance,portableequipment,etc.,with
transientovervoltageslessthanOvervoltageCategoryIII.
Symbols
AC(voltage)
DC(directcurrentorvoltage)
•))) ContinuityandDiodetest
mV,Vmillivolt,volt(voltage)
kMohm,kilohm,megohm(resistance)
µA,mA,Amicroamp,milliamp,Amp(current)
ºF,ºCDegreesFahrenheit,centigrade(temperature)
ºLowbattery
HOLDDisplayhold
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