Byram Labs DSA-2003A User manual

6/05 Form #355
OPERATING
INSTRUCTIONS
DSA-2003A
DIGITAL AC/DC CLAMP METER
Byram Labs

1．Safety Warnings
Thisinstrumenthasbeendesigned,manufacturedandtested
accordingtoIEC61010:SafetyrequirementsforElectronicMeasuring
apparatus,anddeliveredinthebestconditionafterpassedthe
inspection.Thisinstructionmanualcontainswarningsandsafety
procedureswhichhavetobeobservedtoensuresafeoperationofthe
instrumentandmaintainitinasafecondition.Thus,theseoperating
instructionshavetobereadpriortousingtheinstrument.
WARNING
●Readthroughandunderstandinstructionscontainedinthis
manualbeforestartingusingtheinstrument.
●Saveandkeepthemanualhandytoenablequickreference
whenevernecessary.
●Besuretousetheinstrumentonlyinitsintendedapplicationsand
tofollowmeasurementproceduresdescribedinthemanual.
●Besuretounderstandandfollowallsafetyinstructionscontained
inthemanual.
Failuretofollowtheaboveinstructionsmaycauseinjury,instrument
damageand/ordamagetoequipmentundertest
―1―
Contents
1．SafetyWarnings ………………………………………………………1
2．Features ………………………………………………………………5
3．Specifications …………………………………………………………6
4．InstrumentLayout ……………………………………………………9
5．PreparationforMeasurement………………………………………12
6．Measurement
6−1 DCCurrentMeasurement……………………………………13
6−2 ACCurrentMeasurement……………………………………15
6−3 DCVoltageMeasurement……………………………………16
6−4 ACVoltageMeasurement ……………………………………17
6−5 ResistanceMeasurement ……………………………………18
6−6 ContinuityCheck ……………………………………………19
6−7 MAXMeasurement …………………………………………20
7．OtherFunctions
7−1 SleepFunction ………………………………………………21
7−2 DataHoldFunction …………………………………………22
7−3 OUTPUTTerminal……………………………………………23
8．BatteryReplacement ………………………………………………25
Byram Labs

Thesymbol indicatedontheinstrumentmeansthattheusermust
refertorelatedpartsinthemanualforsafeoperationoftheinstrument.
Besuretocarefullyreadtheinstructionsfollowingeach symbolin
thismanual.
DANGERisreservedforconditionsandactionsthatarelikelyto
causeseriousorfatalinjury.
WARNINGisreservedforconditionsandactionsthatcancause
seriousorfatalinjury.
CAUTIONisreservedforconditionsandactionsthatcancause
minorinjuryorinstrumentdamage.
Followingsymbolsareusedontheinstrumentandintheinstruction
manual.Attentionshouldbepaidtoeachsymboltoensureyoursafety.
Thissymbolismarkedwheretheusermustrefertothe
instructionmanualsoasnottocausepersonalinjuryor
instrumentdamage.
Indicatesaninstrumentwithdoubleorreinforcedinsulation.
Indicatesthatthisinstrumentcanclamponbareconductors
whenmeasuringavoltagecorrespondingtotheapplicable
Measurementcategory,whichismarkednexttothissymbol.
IndicatesAC(AlternatingCurrent).
IndicatesDC(DirectCurrent).
IndicatesACandDC.
―2―
DANGER
●Nevermakemeasurementonacircuitinthefollowingcategories;
MeasurementcategoryⅣ(CAT.Ⅳ) :overAC/DC600V
MeasurementcategoryⅢ(CAT.Ⅲ)orlower:overAC750V/DC1000V
●Donot makemeasurement whenthunder isrumbling. Stop
measurementandtakeofftheinstrumentfromtheobjectundertest.
●Donotattempttomakemeasurementinthepresenceofflammable
gasses,fumes,vaporordust.Otherwise,theuseoftheinstrumentmay
causesparking,whichcanleadtoanexplosion.
●Thetransformerjawsaremadeofmetalandtheirtipsarenotinsulated.
Whereequipmentundertesthasexposedconductiveparts,be
especiallycarefulaboutthehazardofpossibleshorting.Notfollowing
thisinstructionmaycandangertotheuser.
●Neverattempttousetheinstrumentifitssurfaceoryourhandiswet.
●Donotexceedthemaximumallowableinputofanymeasurementrange.
●Neveropenthebatterycompartmentcoverwhenmakingmeasurement
●Nevertrytomakemeasurementifanyabnormalconditions,suchas
brokenTransformerjawsorcaseisnoted.
●Toavoidelectricalshockbytouchingtheequipmentundertestorits
surroundings,besuretowearinsulatedprotectivegear.
●Theinstrumentistobeusedonlyinitsintendedapplicationsor
conditions.Otherwise,safetyfunctionsequippedwiththeinstrument
doesn,twork,andinstrumentdamageorseriouspersonalinjurymaybe
caused.
WARNING
●Neverattempttomakeanymeasurement,iftheinstrumenthasany
structuralabnormalitysuchascrackedcaseandexposedmetalpart.
●DonotturntheFunctionSelectorswitchwithtestleadsconnectedtothe
instrument.
●Donotinstallsubstitutepartsormakeanymodificationtothe
instrument.Returntheinstrumenttoyourdistributorforrepairorre-
calibration.
●Donottrytoreplacethebatteriesifthesurfaceoftheinstrumentiswet.
●Alwaysswitchofftheinstrumentbeforeopeningthebattery
compartmentcoverforbatteryreplacement.
●AlwaysbesuretokeepyourfingersandhandsbehindtheSafetybarrier.
(see⑯ of4. Instrument Layout)Otherwise,usermaybeexposedto
thedangerofelectricalshock.
―3―
Byram Labs

2．Features
●Tear-drop-shapedjawsforeaseofuseincrowdedcableareasand
othertightplaces
●Providesawidemeasuringrangefrom0upto2000A
●Terminalcovertoavoidtheuseofincorrectuseoftheinput
terminals.
●MAXmeasurementfunctionforeasyreadingofmaximuminputover
acertainperiodoftime
●Outputterminalforlongtermcurrentmonitoring
●Safetydesignthroughoutconformingtothefollowingprovisionsof
IEC61010 Pollutiondegree2,overvoltagecategoryⅣ 600V
Pollutiondegree2,overvoltagecategoryⅢ 1000V
●Dataholdfunctiontoallowforeasyreadingsindimlylitorhard-to-
readlocations.
●Sleepfeaturetoconservebatterypower.
●Permitseasycontinuitycheckwithabeeper
●Providesadynamicrangeof4,000countsfullscale
●Widefrequencyrangefrom40Hzto1kHz
●Transformerjawsfittedwillguardtofurtherimprovesafety
―5―
CAUTION
●MakesurethattheFunctionSelectorswitchissettoanappropriate
positionbeforemakingmeasurement.
●Alwaysmakesuretoinserteachplugofthetestleadsfullyintothe
appropriateterminalontheinstrument.
●BesuretosettheFunctionSelectorswitchtothe"OFF"positionafter
use.Whentheinstrumentwillnotbeinuseforalongperiodoftime,
placeitinstorageafterremovingthebatteries.
●Donotexposetheinstrumenttothedirectsun,extremetemperatures
ordewfall.
●Useadampclothanddetergentforcleaningtheinstrument.Donot
useabrasivesorsolvents.
●Takesufficientcarenottoapplyshocksuchasdrop.Otherwise,
preciselyadjustedTransformerjawswillbedamaged.
●BecarefulnottopinchsomeforeignsubstanceswiththeTransformer
jawtips.
○Measurementcategories(Over-voltagecategories)
Toensuresafeoperationofmeasuringinstruments,IEC61010
establishessafetystandardsforvariouselectricalenvironments,
categorizedasCATⅠtoCATⅣ,andcalledmeasurementcategories.
Higher-numberedcategoriescorrespondtoelectricalenvironments
withgreatermomentaryenergy,soameasuringinstrument
designedforCATⅢ environmentscanenduregreatermomentary
energythanonedesignedforCATⅡ
CAT.Ⅰ: SecondaryelectricalcircuitsconnectedtoanACelectricaloutlet
throughatransformerorsimilardevice.
CAT.Ⅱ: PrimaryelectricalcircuitsofequipmentconnectedtoanAC
electricaloutletbyapowercord.
CAT.Ⅲ: Primaryelectricalcircuitsoftheequipmentconnecteddirectlyto
thedistributionpanel,andfeedersfromthedistributionpanelto
outlets.
CAT.Ⅳ: Thecircuitfromthe
servicedroptotheservice
entrance,andtothepower
meterandprimaryover-
currentprotectiondevice
(distributionpanel).
―4―
Byram Labs

OUTPUTVoltage(Outputimpedance:about10kΩ)
※Electromagneticcompatibility（EN61000-4-3）
:RFfieldstrength=<=1V/m,totalaccuracy=specifiedaccuracy
:RFfieldstrength=3V/m,totalaccuracy=specifiedaccuracy+1%ofrange
●OperatingSystem :DualIntegration
●Display :Liquidcrystaldisplaywithmaximum
countsof4000
●LowBatteryWarning :"BATT"symbolisdisplayedonthedigital
display.
●OverrangeIndication :"OL"isdisplayedwhereinputexceedsthe
upperlimitofarange
●ResponseTime :Approx.2seconds
●Samplerate :Approx.2.5timespersecond
●Locationforuse :Indoor/Outdooruse,Altitudeupto
2000m
●TemperatureandHumidityforGuaranteedAccuracy
:23℃±5,relativehumidityupto85%
withoutcondensation
●OperatingTemperatureandHumidity
:0to40℃,relativehumidityupto85%
withoutcondensation
●StorageTemperatureandHumidity
:−20to60℃,relativehumidityupto90%
withoutcondensation
―7―
3．Specifications
MeasuringRangesandAccuracy(at23±5℃,45to85%RH)
―6―
DC
AC
DCOutputVoltages InputCurrents AccuracyRange
400A
2000A
400A
2000A
0to400.0mV
0to200.0mV
0to400.0mV
0to100.0mV
100.1 to 200.0mV
0to400A
0to2000A
0to400A
0to1000A
1001to2000A
±1.5%rdg±3mV
±1.5%rdg±3mV
±1.5%rdg±3mV(50/60Hz)
±3.0%rdg±3mV(40〜500Hz)
±5.0%rdg±3mV(500〜1kHz)
±3.0%rdg±3mV(50/60Hz)
400A
2000A
MeasuringRanges
0to±400.0A
0to±2000A
Accuracy
±1.5%rdg±2dgt
Range
2000A
400A
MeasuringRanges
0to400.0A
Accuracy
±1.5%rdg±2dgt(50/60Hz)
±3.0%rdg±4dgt(40〜500Hz)
±5.0%rdg±4dgt(500〜1kHz)
Range
DCCurrent
ACCurrent
400V
1000V
MeasuringRanges
0to±400.0V
0to±1000V
Accuracy
±1.0%rdg±2dgt
Range
400V
750V
MeasuringRanges
0to400.0V
0to750V
Accuracy
±1.5%rdg±2dgt(50/60Hz)
±1.5%rdg±4dgt(40〜1kHz)
Range
400Ω/
4000Ω
MeasuringRanges
0to4000Ω
Accuracy
±1.5%rdg±2dgt
Range
400Ω
MeasuringRanges
0〜400.0Ω Accuracy ±1.5%rdg±2dgt（Buzzerbeepsat50±35Ωofless）
Range
DCVoltage(Inputimpedance:2MΩ)
ACVoltage(Inputimpedance:2MΩ)
Resistance(Auto-ranging)
Resistance(Fixed)
0to1000A ±1.5%rdg±2dgt(50/60Hz) ±3.0%rdg±4dgt(40〜500Hz)
±5.0%rdg±4dgt(500〜1kHz)
1001to2000A ±3.0%rdg±2dgt(50/60Hz)
Byram Labs

4. Instrument Layout
①TransformerJaws：Includecurrentsensors
②JawTrigger：Usedtoopenandclosethetransformerjaws
③FunctionSelectorSwitch
Selectsfunctiontouse.Alsoswitchesofftheinstrumentwhenset
tothe"OFF"position.
④DataHoldButton
Freezesthedisplayreadingwith胱symbolshownonthedisplay
whenpushedin.
―9―
●PowerSource :TwoR6P(DC1.5V)batteriesorequivalent
●CurrentConsumption :Approx.9mAmax
●Sleepfunction :AutomaticallyswitchestotheSleepmode
inabout10minutesafterthelastswitch
orbuttonoperation(currentconsumption
intheSleepmode:about20μA)
●SafetyStandard: :IEC61010-2-032pollutiondegree2
overvoltageCAT.Ⅳ 600V
overvoltageCAT.Ⅲ 1000V
EMC：EN61326
・EN55022
・EN61000-4-2(perfomancecriterionB)
・EN61000-4-3(perfomancecriterionB)
●OverloadProtection :
AC/DCcurrentranges2400AAC/DCfor10sec
AC/DCvoltageranges1200VAC/DCfor10sec
Resistanceranges600VAC/DCfor10sec
●WithstandVoltage :6880VACfor5seconds
（betweenelectricalcircuitandhousing
casesormetalpartsofjaws）
●InsulationResistance :10MΩ orgreaterat1000V
（betweenelectricalcircuitandhousing
casesor,metalpartsofjaws）
●ConductorSize :Approx.55mmdiametermax
●Dimensions :250(L)×105(W)×49(D)mm
●Weight :Approx530g
●Accessories :TestleadsM-7017 ……………………1set
:R6Pbatteries ……………………………2
:Carryingcase ……………………………1
:OutputPlugM-8201 ……………………1
:Instructionmanual ………………………1
―8―
Byram Labs

⑨TerminalCover
Usedtoenclosetheinputterminals(COMandV/Ω )whenthe
OUTPUTterminalisinuse,thusavoidingaccidentalapplicationof
voltagetotheinstrument.
⑩OUTPUTTerminal(forcurrentmeasurementonly)
ProvidesDCvoltageinproportiontothereadingonanACorDC
currentrange.Thevoltageisusedforsuchpurposesaslongterm
monitoringwitharecorderorotherrecordingdevices.This
terminalcannotbeaccessedonavoltageorresistancerange.
⑪COMTerminal
Acceptstheblacktestleadforvoltageorresistancemeasurement.
⑫V／Ω Terminal
Acceptstheredtestleadforvoltageorresistancemeasurement.
⑬SafetyHandStrap
Preventstheinstrumentfromslippingoffthehandcuringuse.
⑭TestLeads(M-7017)
ConnecttoCOMandV/Ω Terminalterminalsforresistance
measurement.
⑮OutputPlug(M-8201)
InsertthisplugintotheOUTPUTterminaltoobtainDCoutput
voltage.Connectsuitableconnectioncordtotheplugwhenitis
used.
⑯Barrier
Itisapartprovidingprotectionagainstelectricalshockand
ensuringtheminimumrequiredairandcreepagedistances.
―11―
⑤AC/DCButton
UsedtoswitchtheinstrumentbetweentheACandDCmodes.
TheinstrumentissettotheACmodewhenitispoweredon.Press
thisbuttontoselecttheDCmode.
⑥ModeButton
Apressofthisbuttononacurrentorvoltagerangeturnsthe
instrumenttotheMAXmeasurementmodewith
腋胙腴
shownon
thedisplay.PressthebuttonagaintoexittheMAXmode.
Apressofthebuttonontheresistancerangeturnstheinstrument
tothecontinuitycheckmodewith symbolshownonthe
display.Inthismode,thebuzzerbeepswhenthereadingisabout
50Ω orless.Pressthebuttonagaintoexitthecontinuitycheck
mode.
⑦ZeroADJ./RESETButton
Usedforzeroadjustmenton400ADCrangeorforresettingthe
readingintheMAXmode.
胙腮腱腆
symbolisshownonthedisplay
whenzeroadjustmentisenabledon400ADCrange.(Zero
adjustmentisavailableonlyon400ADCrange.)
⑧LCDDisplay
Fieldeffecttypeofliquidcrystaldisplaywithmaximumcountsof
3999andmicroprocessor-controlledannunciatorsandthedecimal
point.
―10―
AC
Minus
Continuity check
Low Battery Warning Zero ADJ.
DC MAX Data Hold
Resistance
Voltage
Current
Byram Labs

6．Measurement
6-1 DC Current Measurement
DANGER
●Toavoidelectricshock,nevermakemeasurementonacircuitin
thefollowingcategories;
MeasurementcategoryⅣ(CAT.Ⅳ) :overAC/DC600V
MeasurementcategoryⅢ(CAT.Ⅲ)orlower:overAC750V/DC1000V
●Donotmakemeasurementwiththebatterycompartmentcover
removedfromtheinstrument.
●Donotmakecurrentmeasurementwiththetestleadsconnected
totheinstrument.
●Keepyourfingersandhandsbehindthebarrierduring
measurement.
a.SettheFunctionSelectorswitchtothe"400A"positionandpressthe
AC/DCbuttontoselecttheDCmode."DC"shouldbeshownonthe
upperleftcornerofthedisplay.
b.Withthetransformerjawsclosedwithoutclampingthemontothe
conductor,presstheZeroADJ.buttonforaboutonesecondtozero
adjustthedisplay.(TheZeroADJbuttonisenabledonlyon400A
DCrange.)
胙腮腱腆
shouldbeshownonthedisplay.
c.SettheFunctionSelectorswitchtothepositionappropriateforthe
orderofthecurrentundertest.
―13―
5．Preparation for Measurement
5-1 Checking Battery Voltage
SettheFunctionSelectorswitchtoanypositionotherthan"OFF".
Whenthedisplayisclearwithout
胝胙腱腱
showing,proceedto
measurement.
Whenthedisplayblanksor
胝胙腱腱
isshown,replacethebatteries
accordingtosection8: Battery Replacement
NOTE
TheSleepfunctionautomaticallyturnstheinstrumentoffinacertain
periodoftimeafterthelastswitchoperation.Therefore,thedisplay
maybeblankwiththeFunctionSelectorswitchsettoaposition
otherthan"OFF".
Tooperatetheinstrumentinthiscase,settheswitchbacktothe
"OFF"position,thentothedesiredposition,orpressanybutton.If
thedisplaystillblanks,thebatterieshaveexhausted.Replacethe
batteries.
5-2 Checking Switch Setting
MakesurethattheFunctionSelectorswitchissettothecorrect
position,theinstrumentissettothecorrectmodeandtheDataHold
functionisdeactivated.Otherwise,desiredmeasurementcannotbe
made.
―12―
Correct Wrong
Byram Labs

6−2AC Current Measurement
DANGER
●Toavoidelectricshock,nevermakemeasurementonacircuitin
thefollowingcatrgories;
MeasurementcategoryⅣ(CAT.Ⅳ) :overAC600V
MeasurementcategoryⅢ(CAT.Ⅲ)orlower:overAC750V
●Donotmakemeasurementwiththebatterycompartmentcover
removedfromtheinstrument.
●Donotmakecurrentmeasurementwiththetestleadsconnected
totheV/Ω andCOMterminals
●Keepyourfingersandhandsbehindthebarrierduring
measurement.
a.SettheFunctionSelectorswitchtothe"400A"or"2000A"position
andselecttheACmode.IftheinstrumentisintheDCmode,press
theAC/DCbuttononcetoselecttheACmode.(Theinstrumentis
settotheACmodewhenitispoweredon.)"AC"shouldbeshown
ontheupperleftcornerofthedisplay.
b.Pressthetriggertoopenthetransformerjawsandclampthemonto
theconductorundertestandtakethereadingonthedisplay.
◇Duringcurrentmeasurement,keepthetransformerjawsfully
closed.Otherwise,accuratemeasurementcannotbemade.The
maximummeasurableconductorsizeis55mmindiameter.
◇UnlikeinDCcurrentmeasurement,zeroadjustmentisnot
necessaryinACcurrentmeasurement.Thereisnopolarityinthe
readingeither
―15―
d.Pressthetriggertoopenthetransformerjawsandclampthemonto
theconductorundertestandtakethereadingonthedisplay
NOTE
◇Duringcurrentmeasurement,keepthetransformerjawsfully
closed.Otherwise,accuratemeasurementcannotbemade.The
maximummeasurableconductorsizeis55mmindiameter.
◇Whenthecurrentflowsfromtheupside(thedisplayside)tothe
undersideoftheinstrument,thepolarityofthereadingispositive
andviceversa.
◇TheoutputvoltagefromtheOUTPUTterminalmaynotreduceto
nilevenifthedisplayiszeroadjustedwiththeZeroADJbutton.
Inthiscase,makezeroadjustmentontherecorderorotherdevice
thattheoutputvoltageisconnectedto.
―14―
Correct Wrong
Byram Labs

6−4AC Voltage Measurement
DANGER
●Toavoidelectricshock,nevermakemeasurementonacircuitin
thefollowingcategories;
MeasurementcategoryⅣ(CAT.Ⅳ) :overAC600V
MeasurementcategoryⅢ(CAT.Ⅲ)orlower:overAC750V
●Donotmakemeasurementwiththebatterycompartmentcover
removed
●Keepyourfingersandhandsbehindthebarrierduring
measurement.
a.SettheFunctionSelectorswitchtothe"400V"or"750V"position.If
theinstrumentisintheDCmode,presstheAC/DCbuttononceto
selecttheACmode.(TheinstrumentissettotheACmodewhenitis
poweredon.)The"AC"shouldbeshownontheupperleftcornerof
thedisplay.
b.Slidetheterminalcovertotheleft.PlugtheredtestleadintotheV/
ΩterminalandtheblacktestleadintotheCOMterminal.
c.Connectthetipofthetestleadstothecircuitundertest.Takethe
readingonthedisplay.
―17―
6−3DC Voltage Measurement
DANGER
●Toavoidelectricshock,nevermakemeasurementonacircuitin
thefollowingcategories;
MeasurementcategoryⅣ(CAT.Ⅳ) :overDC600V
MeasurementcategoryⅢ(CAT.Ⅲ)orlower:overDC1000V
●Donotmakemeasurementwiththebatterycompartmentcover
removed
●Keepyourfingersandhandsbehindthebarrierduring
measurement.
a.SettheFunctionSelectorswitchtothe"400V"or"1000V"position.
b.Slidetheterminalcovertotheleft.PlugtheredtestleadintotheV/
ΩterminalandtheblacktestleadintotheCOMterminal.
c.Connecttheotherendofthetipoftheredtestleadthepositiveside
ofthecircuitundertestandthetipoftheblacktestleadtothe
negativeside.Takethereadingonthedisplay.Ifthetestlead
connectionisreversed,the"—"signisshownonthedisplay.
―16―
Black test lead Red test lead
Black test lead Red test lead
Byram Labs

6-6 Continuity Check (Fixed 400Ωrange)
DANGER
●Nevertrytomakemeasurementonacircuitthatisnotdelive.
●Donotmakemeasurementwiththebatterycompartmentcover
removed.
●Keepyourfingersandhandsbehindthebarrierduring
measurement.
a.SettheFunctionSelectorswitchtothe（Ω／ ） position.
b.Slidetheterminalcovertotheleft.PlugtheredtestleadintotheV/
ΩterminalandtheblacktestleadintotheCOMterminal.
c.Pressthemodebuttontoselectthecontinuitycheckmode.The
symbolshouldbeshownonthedisplay
d.Checkthatthedisplayreads"OL".Thenshorttogetherthetipofthe
testleadsandmakesurethatthedisplayreads"0"andthebuzzer
beeps
e.Connectthetipofthetestleadstothecircuitundertest.Thebuzzer
beepswhentheresistanceisabout50Ω orless.
NOTE
◇Whenthetipofthetest
leadsisshortedtogether,
thedisplaymayreada
very small resistance
insteadof"0".Thisisthe
resistance of the test
leads,notafault.
◇Ifoneofthetestleadshas
abreak,thedisplayreads
"OL".
―19―
6−5Resistance Measurement
DANGER
●Nevertrytomakemeasurementonacircuitthatisnotde-
energized.
●Donotmakemeasurementwiththebatterycompartmentcover
removed
●Keepyourfingersandhandsbehindthebarrierduring
measurement.
a.SettheFunctionSelectorswitchtothe（Ω／ ）position.
b.Slidetheterminalcovertotheleft.Plugtheredtestleadintothe
V/Ω terminalandtheblacktestleadintotheCOMterminal.
c.Checkthatthedisplayreads"OL".Then,shortthetipofthetest
leadstogetherandcheckthatthedisplayreads"0".
d.Connectthetipofthetestleadstothecircuitundertestandtakethe
readingonthedisplay.
NOTE
◇Whenthetipofthetestleadsisshortedtogether,thedisplaymay
readaverysmallresistanceinsteadof"0".Thisistheresistance
ofthetestleads,notafault.
◇Ifoneofthetestleadshasabreak,thedisplayreads"OL".
―18―
Black test lead Red test
lead
Black test lead Red test lead
Byram Labs

7．Other Functions
7−1 Sleep Function
NOTE
TheinstrumentconsumessmallamountofcurrentintheSleep
(power-down)mode.MakesuretoturntheFunctionSelector
switchtothe"OFF"position,whentheinstrumentisnotinuse.
Thisisafunctiontopreventtheinstrumentfrombeingleftpowered
oninordertoconservebatterylife.Thisfunctioncausesthe
instrumenttoswitchtotheSleep(powered-down)modeabout10
minutesafterthelastswitchorbuttonoperation.
ToexittheSleepmode,pressanybuttonorturntheFunction
Selectorswitchbackto"OFF",thentoanyotherposition.
［HowtodisabletheSleepfunction］
PoweringtheinstrumentonwiththeDataHoldbuttonpressed
disablestheSleepfunction."P.OFF"isshownonthedisplayfor
about3secondstoindicatethis.
ToenabletheSleepfunction,turntheFunctionSelectorswitch
backto"OFF",thentoanyotherposition.
NOTE
◇TheSleepfunctionisdisabledwhiletheoutputplugisinserted
intotheOUTPUTterminal.Whentheoutputplugisdisconnected
fromtheterminal,theSleepfunctionisenabledinabout10
minutes.
―21―
6−7MAX Measurement (Response time: 400ms)
TheMAXmeasurementmodeisusedtodisplayamaximumreading
overacertainperiodoftime.Thisfunctionisavailableonallranges
otherthanΩ ranges.
DANGER
●Nevermakemeasurementonacircuitinthefollowingcategories;
MeasurementcategoryⅣ(CAT.Ⅳ) :overAC/DC600V
MeasurementcategoryⅢ(CAT.Ⅲ)orlower:overAC750/DC1000V
●Donotmakemeasurementwiththebatterycompartmentcover
removed.
●Donotmakemeasurementwiththetestleadsconnectedtothe
instrument.
●Keepyourfingersandhandsbehindthebarrierduring
measurement.
a.SettheFunctionSelectorswitchtothedesiredposition.
b.PresstheModebuttontoselecttheMAXmeasurementmode.
腋胙腴
shouldbeshownonthedisplay.
c.Inordertotakeacorrectreading,presstheZeroAdjust/Reset
buttononceafterclampingthejawsontotheconductoror
connectingthetestleadstothecircuitundertest.
d.Thedisplayshowsthemaximumreadingduringmeasurement
e.PresstheZeroAdjust/Resetbuttononceagaintoreturntothe
normalmeasurementmode.
NOTE
◇DataHoldfunctionisdisabledinMAXmeasurementmode.
◇Formeasurementoveraperiodmorethan10minutes,disablethe
Sleepfunctionaccordingtotheinstructioninsection7-1: Sleep
Function.Otherwise,theinstrumentautomaticallyturnsitselfoff
inabout10minutes.
―20―
Byram Labs

7-3 OUTPUT Terminal (For current measurement only)
DANGER
●Nevermakemeasurementonacircuitinthefollowingcategories;
MeasurementcategoryⅣ(CAT.Ⅳ) :overAC/DC600V
MeasurementcategoryⅢ(CAT.Ⅲ)orlower:overAC750V/DC1000V
●Donotmakemeasurementwiththebatterycompartmentcover
removed.
●NeverapplyvoltagetotheOUTPUTterminal.
a.ToobtainoutputvoltagefromtheOUTPUTterminal,connecta
suitablecordtothesuppliedoutputplug.
b.Slidetheterminalcovertotherightto
enclosetheCOMandV/Ω terminals.
InserttheoutputplugintotheOUTPUT
terminalforconnectionwitharecorderor
otherrecordingdevice.
c.SettheFunctionSelectorswitchtothe
"400A"or"2000A"position.(Theoutputis
availableonlyinthetworanges.)Proceed
tomeasurementintheDCorACmode.
NOTE
◇Duringcurrentmeasurement,keepthetransformerjawsfully
closed.Otherwise,accuratemeasurementcannotbemade.The
maximummeasurableconductorsizeis55mmindiameter.
◇UnlikeinDCcurrentmeasurement,zeroadjustmentisnot
―23―
7−2Data Hold Function
Thisisafunctionusedtofreezethemeasuredvalueonthedisplay.
PresstheDataHoldbuttontofreezethereading.Thereadingwill
beheldregardlessofthesubsequentvariationofcurrent,voltageor
resistanceundertest.胱isshownontheupperrightcornerofthe
display.
ToexittheDataHoldmode,presstheDataHoldbuttonagain.
NOTE
◇TheDataHoldmodeisdisabledwhentheinstrumentswitchesto
theSleepmode.
◇TheDataHoldfunctionisdisabledintheMAXmeasurement
mode.
―22―
Byram Labs

8．Battery Replacement
WARNING
●Toavoidelectricshockhazard,makesuretosettheFunction
Selectorswitchto"OFF"andremovethetestleadsfromthe
instrumentbeforetryingtoreplacebatteries
CAUTION
●Donotmixnewandoldbatteries.
●Makesuretoinstallbatteriesincorrectpolarityasindicatedinthe
batterycompartment.
Iftheinstrumentispoweredon,butthedisplayblanksor
胝胙腱腱
is
shownonthelowerleftcornerofthedisplay,replacethebatteries.
a.SettheFunctionSelectorswitchtothe"OFF"position.
b.Unscrewandremovethebatterycompartmentcoveronthebottom
oftheinstrument.
c.Replacethebatteriesobservingcorrectpolarity.Makesuretouse
twonewR6Pbatteries.
d.Replaceandscrewthebattery
compartmentcover.
―25―
necessaryinACcurrentmeasurement.Thereisnopolarityinthe
readingeither.
◇IntheDCmode,theoutputvoltagefromtheOUTPUTterminal
maynotreducetonilevenifthedisplayiszeroadjustedwiththe
ZeroADJbutton.Inthiscase,makezeroadjustmentonthe
recorderorotherdevicethattheoutputvoltageisconnectedto.
◇TheSleepfunctionisdisabledwhiletheoutputplugisinserted
intotheOUTPUTterminal.Whentheoutputplugisdisconnected
fromtheterminal,theSleepfunctionisenabledinabout10
minutes.
◇Settheappropriatesensitivityontherecorderorotherrecording
device.Seesection3 for output voltage specifications.
―24―
Batteries
Screw
Byram Labs