Extech Instruments EX650 User manual

USERGUIDE
600ATrueRMSDigitalClampMeters
EX650Series

EX650TrueRMS600AACDigitalClampMeter
EX655TrueRMS600AAC/DCClampMeterwithTemperature,
Inrush,andLowPassFilter
 
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TableofContents
1.INTRODUCTION3
2.SAFETYINFORMATION4
3.DESCRIPTIONS6
4.OPERATION11
PoweringtheMeter11
DisableAutoPowerOFF11
DisplayBacklight11
WorkLight11
DataHold12
TestLeadConsiderations12
VoltageMeasurements12
‘LoZ’ACVoltageMeasurements15
CurrentMeasurementsUsingtheClamp16
µAAC/DCCurrentMeasurementsusingTestLeads18
Non‐ContactVoltageDetector19
ResistanceMeasurements20
ContinuityMeasurements22
CapacitanceMeasurements23
FrequencyMeasurements(EX655)25
DiodeTest26
TemperatureMeasurements(EX655only)27
ExtendedFunctionalityModes28
InrushCurrentMode(EX655only)28
DCAZERO(EX655only)29
MAX‐MINMode29
LowPassFilter(LPF)EX655only30
Relative Mode30
5.MAINTENANCE31
6.SPECIFICATIONS32

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1. Introduction
ThankyouforselectingtheExtechEX650SeriesClampMeter.

TheEX650isafeature‐packedTrueRMSdigitalClampmeterserieswith6000countbacklit
displayandautomaticranging.

MeasureAC/DCvoltage,ACcurrent,DCcurrent(EX655),Inrushcurrent(EX655),Resistance,
Diode,Continuity,Capacitance,Temperature(EX655),Lo‘Z’lowimpedancemode,and
Frequency(EX655).

OtherfunctionsincludeDataHold,Maximum/MinimumMemory,Relativemode,LowPassFilter
(LPF)forVariableFrequencyDrivesignals(EX655),Worklight,NCV(Non‐ContactVolt
Detection),andAutopower‐off.

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
6000countdigitaldisplay
60segmentanalogbargraphdisplayonEX655model
LargebacklitLEDdisplay
TrueRMSACmeasurements
LoZmodeeliminatesghostvoltagereadingsonnon‐energizedcircuits
AutoandManualRangemodes
0.5%DCVaccuracy
DataHold
InrushcurrentmodeonEX655model
Relativemode
AutoPowerOFF(APO)withdisablefunction
Temperaturemeasurements(ModelEX655only)withincludedtemperatureprobe
600AACcurrentmeasurements
600ADCCurrentMeasurementsonEX655model
Non‐ContactVoltageDetector
Visualandaudiblecontinuitymeasurementalert
Lowbatteryindicator
Includestestleads,Type‐Ktemperatureprobe(EX655),andthree(3)1.5VAAAbatteries.
CATIII600V/CATII1000V
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2. SafetyInformation
Toensurethesafeoperationandserviceofthemeter,followtheseinstructionsclosely.Failureto
observewarningscanresultinsevereinjury.
WARNINGS
WARNINGSidentifyhazardousconditionsandactionsthatcouldcauseBODILYHARMorDEATH.
Whenhandlingtestleadsorprobes,keephandsandfingersbehindthefingerguardsatalltimes.To
avoidelectricalshockdonottouchexposedelectricalwire,connectors,unusedinputterminals,or
circuitsundertest.
Removetestleadsfromthemeterbeforeopeningthebatterycompartmentormeterhousing.
UsethemeteronlyasspecifiedinthisUserGuideoraccompanyingQuickStarttoavoidcompromising
theprotectionsprovidedbythemeter.
Besuretousetheproperterminals,switchpositions,andrangeswhentakingmeasurements.
Verifythemeter’soperationbymeasuringaknownvoltage.Havethemeterservicedifthemeter
respondsunusuallyoriftherearequestionsregardingthemeter’sfunctionalintegrity.
Donotapplymorethantheratedvoltage,asmarkedonthemeter,betweenterminalsorbetweenany
terminalandearthground.
Donotmeasurevoltagesabove1000VDCor750VACbetweenterminalandgroundtopreventelectrical
shockanddamagetotheClampmeter.
Usecautionworkingwithvoltagesabove30VACRMS,42VACpeak,or60VDC.Thesevoltagesposea
shockhazard.
Toavoidmisleadingreadingsthatcouldleadtoelectricshockandinjury,replacethebatteriesassoonas
thelowbatteryindicatorisdisplayed.
Disconnectpowertothecircuitundertestanddischargeallhigh‐voltagecapacitorsbeforetesting
resistance,continuity,diodes,orcapacitance.
Donotusethemeterinthepresenceofexplosivegasorvapor.
Toreduceriskoffireorelectricshock,donotusethemeterifitiswetanddonotexposethemeterto
moisture.
IndividualprotectiveequipmentshouldbeusedifHAZARDOUSLIVEpartsintheinstallationwhere
measurementsaretobecarriedoutcouldbeaccessible.

CAUTIONS
CAUTIONSidentifyconditionsandactionsthatcouldcauseDAMAGEtothemeterorequipment
undertest.Donotexposethemetertoextremesintemperatureorhighhumidity.
Disconnectthetestleadsfromthetestpointsbeforechangingthepositionofthefunction(rotary)
switch.
Donotexposethemetertoextremesintemperatureortohighhumidity.
Neversetthemetertotheresistance,diode,capacitance,micro‐amp,orampfunctionswhen
measuringthevoltageofapowersupplycircuit;thiscouldresultinmeterdamageanddamagetothe
equipmentundertest.

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SafetySymbolsthataretypicallymarkedonmetersandinstructions
Thissymbol,adjacenttoanothersymbol,indicatestheusermustrefertothe
manualoruserguideforfurtherinformation.
Riskofelectricalshock
Fusesymbol
Equipmentprotectedbydoubleorreinforcedinsulation
LowBatterysymbol
ConformstoEUdirectives
Donotdiscardthisproductinhouseholdtrash.
ACmeasurement
DCmeasurement
Earthground

UnsafeVoltageAlert
Whenthemeterdetectsavoltageequaltoorgreaterthan30Voravoltageoverload(OL)inVorLoZmode,
thesymbolisdisplayed.Thissystemwasdesignedtoalerttheuserofapotentiallyhazardousvoltage.
PERIEC1010OVERVOLTAGEINSTALLATIONCATEGORY
OVERVOLTAGECATEGORYI
EquipmentofOVERVOLTAGECATEGORYIisequipmentforconnectiontocircuitsinwhichmeasuresare
takentolimitthetransientover‐voltages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

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3. Descriptions

MeterDescription(EX655pictured)
1. Non‐ContactVoltageDetector
2. Clampjaw
3. WorkLightON/OFFbutton
4. NCValertLEDlamp
5. Rotaryfunctionswitch
6. Max‐Minbutton
7. Relative,DCAZero,andInrushbutton(DCAZero&InrushonEX655only)
8. LCDmulti‐functiondisplaywithbacklighting
9. Positiveinputterminal
10. Common(‐)inputterminal
11. Mode(M)andLPF(lowpassfilter)button(LPFonEX655only)
12. BacklightandHoldbutton
13. JawTrigger
14. WorkLight
Note:Batterycompartmentonbackofmeter
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Fig3‐1METERDESCRIPTION

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DisplayIconDescriptionsforEX650
1234 5 6
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Fig3‐2EX650METERDISPLAY
1. Highvoltage
2. Batterystatus
3. Relativemode
4. Autopoweroff
5. Datahold
6. Unitsofmeasure
7. DirectCurrent
8. AlternatingCurrent
9. Diode
10. Continuity
11. Automaticrange
12. LowImpedancemode(LoZ)
13. MaximumandMinimummemory
14. Non‐ContactVoltageDetector
15. LowPassFilter(LPF)
16. Temperatureunits
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DisplayIconDescriptionsforEX655

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Fig3‐3EX655METERDISPLAY
1. Highvoltage
2. Batterystatus
3. Relativemode
4. Autopoweroff
5. Datahold
6. Unitsofmeasure
7. DirectCurrent
8. AlternatingCurrent
9. Diode
10. Continuity
11. Automaticrange
12. LowImpedancemode(LoZ)
13. InrushCurrent(Surge)
14. MaximumandMinimummemory
15. Non‐ContactVoltageDetector
16. LowPassFilter(LPF)
17. Temperatureunits
18. Bargraph

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Push‐ButtonDescriptions
MomentarypressesoftheM(MODE)buttonperformthefunctionsshowninthe
tablebelow.Pressandholdthebuttontoactivate/deactivatetheLowPassFilter
(EX655only).
Fig.3‐4(a)EX655MODEButtonFunctionTable
SwitchPositionMODE(M)ButtonFunction

ACHzDC
or 
AC DC
Ω   
TEMPoC oF
Fig.3‐4(b)EX650MODEButtonFunctionTable
SwitchPositionMODE(M)ButtonFunction

AC DC
AC DC
Ω   
Momentarilypresstoaccess/exittheRelativemode.Thismodeofoperationis
onlyavailableforDCvoltage,ACCurrent,Resistance,andCapacitance.
InDCMode,presstozerothedisplay(EX655only)
WhentheEX655isintheACAmode,pressandholdtoaccesstheInrushmode.

PresstoaccesstheMIN/MAXmode.TheMAXiconwillappearalongwiththe
storedhighestreading.Pressagaintoviewtheminimumreadingstored(MINicon
displayed).Continuetousethebuttoninthismannerasdesired.Pressandhold
thebuttontoexittheMIN/MAXmode.ThismodeofoperationisonlyavailableforAC/DC
Voltage/Current,Resistance,andTemperature.
Pressandholdthisbuttontoactivate/deactivatetheDataHoldfunction.Momentary
pressesswitchthedisplaybacklightONorOFF.

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Fig3‐5(a)‐FunctionSwitchDescription(EX655)
1. LowImpedancemodeforACVoltage
measurements
2. MeterPOWEROFFposition
3. AC/DCVoltageandHzforACV(useMODE
buttontochooseAC,Hz,orDC)
4. Frequencymode
5. Capacitance,Continuity,Diode,
Resistancemodes(useMODEbuttonto
choosemode)
6. Temperaturemode
7. 600µAAC/DCCurrentmode(useMODE
buttontochooseACorDC)
8. AC/DC600ACurrentmode(useMODE
buttontochooseACorDC)
9. Non‐ContactVoltageDetectpositionwith
alertLED

Fig3‐5(b)‐FunctionSwitchDescription(EX650)
1. LowImpedancemodeforACVoltage
measurements
2. MeterPOWEROFFposition
3. AC/DCVoltage(useMODEbuttonto
chooseACorDC)
4. Capacitance,Continuity,Diode,Resistance
modes(useMODEbuttontochoose
mode)
5. 600µAAC/DCCurrentmode(useMODE
buttontochooseACorDC)
6. 6AACCurrentmode
7. 60AACCurrentmode
8. 600AACCurrentmode
9. Non‐ContactVoltageDetectpositionwith
alertLED
1
2
3
4
5
6
7
89