isweek M9803R User manual

BenchMultimeter
UsersManual
M9803R

Introduction
Thismanualcontainsinformationandwarnings, whichmustbefollowedtoensuresafeoperationand
retainthemeterinsafecondition.
WARNING
READ“SAFETY INFORMATION”BEFORE USING THE BENCH MULTIMETER
Thismultimeterisaportability4000-countinstrumentthatisdesignedforuseinthelaboratory, field
servicing, andathome, andanycircumstance. Thismultimeterfeaturecompactdesignwithrounded
cornersforeasyhandlingandhasaruggedcaseinshockresistantandfire-retardant. Andelectronic
overloadprotectionforallfunctionsandranges.
UnpackingandInspection
UponremovingyournewBenchMultimeterfromitspacking,youshouldhavethefollowingitems:
1. BenchMultimeter
2.  TestLeadsset(oneblack,onered)
3. Carryingstrap
4. PowerCord
5. InstructionManual
6. RS232CCable(tobuybyuseroptional)
Ifanyoftheaboveitemsaremissingorarereceivedinadamagedcondition, pleasecontactthe
distributorfromwhom you purchased the unit.
Ⅰ

TableofContent
CHAPTER
SafetyPrecautions ........................................................................................ Ⅳ
Safety Information Ⅴ
1. AQuickTour 1-1
SymbolExplanation 1-1
InstrumentLayout 1-2
UsingtheRotarySwitch 1-5
UsingtheHardkeys 1-6
BuzzerOutput 1-10
Low-BatteryIndication 1-10
2. MakingMeasurements 2-1
Introduction 2-1
Ⅱ
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MeasuringDCVolts 2-2
MeasuringACVolts 2-4
MeasuringACandDCAmps 2-6
MeasuringACandDCMilliamps 2-8
MeasuringCapacitance 2-10
MeasuringFrequencyandAdaptive 2-12
TestingDiodes 2-14
MeasuringResistanceandContinuity 2-16
3. Specifications 3-1
GeneralSpecifications 3-1
ResolutionandAccuracy 3-3
4. Maintenance 4-1
Introduction 4-1
ReplacingtheBattery 4-1
ReplacingtheFuse 4-2
ReplacingthePowerFuse 4-3
OtherNote 4-4
Ⅲ
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Safety Precautions
Injuryordeathcanoccurevenwithlowvoltagesandlowcurrent.Itisextremelyimportantthatyouread
thesesafetyinformationbeforeusingyourmultimeter. Followallsafetypracticesandproperoperating
proceduresforequipmentbeingtested.
1.  Exercise extreme caution when: Measuring voltageabove20volts,measuringcurrentgreaterthat10
mA,measuringACpower line with inductive loads, measuringACpowerlineduringelectricalstorms.
2.  Alwaysinspectyourmultimeter,testleadsandaccessoriesforsignofdamageorabnormalitybefore
everyuse.Ifanyabnormalconditions exist (i.e., brokenordamagedtestleads,crackedcase,displaynot
reading,etc.),donotattempttotakemeasurements.
3. Nevergroundyourselfwhentakingelectricalmeasurements. Donottouchexposedmetalpipes,
outlets,fixtures,etc.,whichmightbeatgroundpotential.Keepyourbodyisolatedfromgroundbyusing
dryclothing,rubbershoes,rubbermats,oranyapprovedinsulatingmaterial.
4. Nevertouchexposedwiring, connections, testprobetips, orany live circuit conductorswhen
attemptingtomakemeasurements.
5. Neverreplacetheprotectivefuseinsidethemu ltimeterwithafuse otherthanthespecifiedor
approvedequalfuse. Replaceonlywithsame type of fuses. To avoidelectricalshock,disconnectthetest
leadsandanyinputsignalsbeforereplacingthefuses.
6. Replaceonlywithsametypeofbattery.Toavoi delectricalshock,Disconnectpowercordfromlive
powersource,andthetestleadsandanyinputsignalsbeforereplacingthebattery. 
Ⅳ

8. Measuringvoltagethat exceeds the limitsofthemultimeter may damage the meter and exposethe
operatortoashockhazard.Alwaysrecognizethemetervoltagelimitsas statedonthefrontofthemeter.
9.  Neverapplymorethan500VDCbetweentheCOMjackandearthground.
10.Nevertouchavoltagesourcewhenthetestleadsarepluggedintoacurrentjack.
11. Whentestingforthepresenceof voltageorcurrent, makesurethevoltageorcurrentranges are
functioningcorrectly. Takeareadingofaknownvoltageorcurrentbeforeassumingazeroreading
indicatesnocurrentorvoltage.
12.Donotattemptcalibrationorserviceunlesstrainedandanotherperson capableofrenderingfirstaid
andresuscitationispresent.
13.Remember:ThinkSafety,ActSafely.
Safety Information
ThemultimetercomplieswithProtectionClassⅡ, OvervoltageCATⅡ of theIEC61010-1(EN61010-1).
Pollutiondegree2inaccordancewithIEC-664indoor use. Iftheequipmentis used in a mannernot
specified,theprotectionprovidedbytheequipmentmaybeimpaired.
Ⅴ
7.  Donotoperatethismultimeterinanexplosiveatmosphere(i.e.,in the presence of flammable gases
orfumes,vaporordust.)

Chapter1
AQuickTour
SymbolExplanation
Earth(ground )TERMINAL
AC-Alternatingcurrent
DC -Directcurrent
Audiblecontinuity
Equipment protectedthroughout by Double Insulation ( Protection Class Ⅱ)
1-1
Caution
Caution,Possibility of electric shock

InstrumentLayout
Figure1-1.  BenchMultimeterFeatures(Forward)
1-2

Figure1-2.  BenchMultimeterFeatures(Backward)
1-3

1. V ΩHz   Volt,Ohms,Diode,Frequency InputTerminal
Thisisthepositiveinputterminalforallfunctionexceptcurrent measurements.Connectionismadeto
usingtheRedtestlead.
2. COM Common Terminal
Thisisthenegative(ground)inputterminalforallmeasurementmodes.Connectionismadetousingthe
Blacktestlead.
3. mA MilliampInputTerminal
Thisisthepositiveinputterminalforcurrentmeasurement(ACor DC) up to 400 mA. Connection is made
tousingtheRedtestlead.
4. A 10 AmperesInputTerminal
Thisisthepositiveinputterminal for current measurement(ACorDC) up to 10A. Connection is made to
usingtheRedtestlead.
5. Function/RangeSelectorRotary Switch
Thisrotaryswitchselectsthefunction,andselectsthedesiredrange.
6. Function/RangeSelectorButtons
1-4
Thisbuttonsselectsthefunction,andselectsthedesiredrange.