Operating Instructions
WARNING: Riskofelectrocution.High-voltagecircuits,bothACandDC,arevery
dangerousandshouldbemeasuredwithgreatcare.
1. ALWAYSturnthefunctionswitchtotheOFFpositionwhenthemeterisnotin
use.ThismeterautomaticallyshutsOFFafter15minutesofinactivity.
2. If“OL”appearsinthedisplayduringameasurement,thevalueexceedsthe
rangeyouhaveselected.Changetoahigherrange.
NOTE: OnsomelowACandDCvoltageranges,withthetestleadsnotconnectedtoa
device,thedisplaymayshowarandom,changingreading.Thisisnormalandiscaused
bythehigh-inputsensitivity.Thereadingwillstabilizeandgiveapropermeasurement
whenconnectedtoacircuit.
AC/DC VOLTAGE MEASUREMENTS
CAUTION: Do not measureAC/ DC voltages if a motor on the circuit is being
switchedONorOFF.Largevoltagesurgesmayoccurthatcandamagethemeter.
1. Setthefunctionswitchtothe position.
2. PresstheMODEbuttontoindicate“DC”or“AC”onthedisplay.
3. Touchtheblacktestprobetiptothenegativesideofthecircuit.Touchthered
testprobetiptothepositivesideofthecircuit.
4. Readthevoltageinthedisplay.
AC/DC CURRENT MEASUREMENTS
1. Forcurrentmeasurementsupto4000μAC/DC,setthefunctionswitchtothe
position.
2. Forcurrentmeasurementsupto200mAAC/DC,setthefunctionswitchtothe
position.
3. PresstheMODEbuttontoindicate“AC”or“DC”onthedisplay.
4. Removepowerfromthecircuitundertest,thenopenupthecircuitatthepoint
whereyouwishtomeasurecurrent.
5. Touchtheblacktestprobetiptothenegativesideofthecircuit.Touchthered
testprobetiptothepositivesideofthecircuit.
6. Applypowertothecircuitandreadthecurrentinthedisplay.
RESISTANCE MEASUREMENTS
WARNING: Toavoidelectricshock,disconnectpowertotheunitundertestand
dischargeallcapacitorsbeforetakinganyresistancemeasurements.Removethe
batteriesandunplugthelinecords.
1. SetthefunctionswitchtotheΩ position.
2. PresstheMODEbuttontoindicateΩonthedisplay.
3. Touchthetestprobetipsacrossthecircuitorpartundertest.Itisbesttodis-
connectonesideofthepartundertestsotherestofthecircuitwillnotinterfere
withtheresistancereading.
4. Readtheresistanceinthedisplay.
CONTINUITY CHECK
WARNING: Toavoidelectricshock,nevermeasurecontinuityoncircuitsorwires
thathavevoltageonthem.
1. SetthefunctionswitchtotheΩ position.
2. PresstheMODEbuttontoindicate onthedisplay
DIODE TEST
1. SetthefunctionswitchtotheΩ position.
2. PresstheMODEbuttontoindicate onthedisplay
3. Touchthetestprobestothediodeundertest.Forwardvoltagewilltypically
indicate0.400to0.700V.Reversevoltagewillindicate“OL”.Shorteddevices
willindicatenear0Vandanopendevicewillindicate“OL”inbothpolarities
CAPACITANCE MEASUREMENTS
WARNING: Toavoidelectricshock,disconnectpowertotheunitundertestand
dischargeallcapacitors beforetakinganycapacitance measurements.Remove
thebatteriesandunplugthelinecords.
1. SetthefunctionswitchtotheΩ position.
2. PresstheMODEbuttontoindicatenFonthedisplay.
3. Touchthetestleadstothecapacitortobetested.
4. Readthecapacitancevalueonthedisplay.
FREQUENCY/DUTY CYCLE MEASUREMENTS
1. Setthefunctionswitchtothe /HZ/%position.
2. PresstheHz/%buttontodisplayHz onthedisplay.
3. Touchthetestprobetipstothecircuitundertest.
4. Readthefrequencyonthedisplay.
5. PresstheHz/%buttonagaintodisplay %onthedisplay.
6. Touchthetestprobetipstothecircuitundertest.
7. Readthe%dutycycleonthedisplay.
NON-CONTACT AC VOLTAGE MEASUREMENT
WARNING: Riskofelectrocution.Beforeuse,alwaystesttheVoltageDetectoron
aknownlivecircuittoverifyproperoperation.
1. Bringtheprobetipnexttothehotconductororinsertintothehotsideofthe
electricaloutlet.
2. IfACvoltageispresent,thedetectorlightwillilluminate.
TheVoltageDetectorworkswiththefunctionswitchinanypositionincludingOFF.
NOTE: Theconductorsinelectricalcordsetsareoftentwisted.Forbestresults,
rubtheprobetipalong a lengthofthecordtoassure placing thetipin
closeproximitytotheliveconductor.
NOTE: Thedetector isdesigned with high sensitivity.Static electricityor other
sourcesofenergymayrandomlytripthesensor.Thisisnormaloperation
FLASHLIGHT
Pressandholdthe buttontoturntheashlighton.Releasethebuttontoturnthe
ashlightoff.
AUTO POWER OFF
Theautoofffeaturewillturnthemeteroffafter15minutes.
Maintenance
REPLACING THE BATTERY
WARNING: Toavoidelectricshock,disconnectthetestleadsfromanysourceof
voltagebeforeremovingthebatterydoor.
1. willappearinthedisplaywhenthebatterydropsbelowtheoperatingvoltage
andrequiresreplacing.
2. Turnoffthemeter.
3. Removethescrewsecuringthebatterycoveratthebottomofthemeter.
4. Replacethebatteriesobservingthecorrectpolarity.
5. Replacethecoverandsecurethescrew.
WARNING: To avoidelectric shock, donot operateyour meteruntil thebattery
coverisinplaceandfastenedsecurely.
RESETTABLE FUSE
The resettable fuse (200mA/500V) will open if the current limits of the meter are
exceededand thefuse willautomatically resetitself when the suspected current is
removedfromthemeter’sinput.
LIMITED WARRANTY
Circuit-TestElectronicswarrantstotheoriginalpurchaserthatthisproductbefreeof
defectinmaterialorworkmanshipforaperiodof2yearsfromthedateofpurchase.
Anyproductwhichhasbeensubjectedtomisuseoraccidentaldamageisexcluded
fromthewarranty.Exceptasstatedabove,Circuit-TestElectronicsmakesnopromises
orwarrantieseitherexpressedorimpliedincludingwarrantiesofmerchantabilityorthe
tnessforanyparticularpurpose.
M-DMR-602/07R13
3. Touchthetestprobetipstothecircuitorwireyouwishtocheck.
4. Iftheresistanceislessthanapproximately100Ω,theaudiblesignalwillsound.
Ifthecircuitisopen,thedisplaywillindicate“OL”.
