www.radioshack.comSM

OWNER’S MANUAL —Completely read this manual before using this meter. 22-813

© 2002 RadioShack Corporation. All Rights Reserved.RadioShack and RadioShack.com are trademarks

used by RadioShack Corporation.

Auto-Ranging with Manual-Ranging Override – the meterautomatically selects a range whenyou measure voltage, current, orresistance. You can also manuallyset the range when measuring valuesyou know are within a certain range.

Latest IC and Display Technology –ensures reliability, accuracy, stability,and ease of operation.

Bar Graph Display – makes nulls,peaks, and trends more apparent.

! IMPORTANT !If an icon appears at the end of a paragraph, go to the box on thatpage with the corresponding icon for pertinent information.

o — Warning ! — Important — CautionÓ Ô — Note

29-RangeAuto/Manual

Digital Multimeter

Data Hold Function – The meterholds the displayed value, so you cansee the reading even after youdisconnect the test leads.

Function Dial

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Thank you for buying a RadioShack 29-Range Auto/Manual Digital Multimeter. Yourmultimeter is a portable, compact auto-ranging digital multimeter. It is ideally suitedfor field, lab, shop, and home applications.The multimeter provides accuratemeasurements and is built to provide thehighest possible reliability. The metermeasures DC and AC voltage up to 600V,DC and AC current up to 10A, resistance upto 40MΩ, and tests 1.5V C, D, AA, AAA, and9V batteries. Its 33/4-digit digital display canshow up to 4,000 units. Its bar graph displayappears with the digital display to let youeasily see nulls, peaks, and trends.

A WORD ABOUT SAFETYWe have taken every precaution indesigning this meter to ensure that it is safe.Safe operation depends on you, theoperator. We recommend that you followthese simple safety rules.

• This equipment is rated for installationcategory II (max. 3600 VA).

• Never apply voltages to the meter thatexceed the limits given in thespecifications. Never apply more than600V DC or AC between the inputjacks and ground.

• Use extreme caution when workingwith voltages above 30V RMS and42.4V peak or 60V DC. Always dis-connect power from the circuit you aremeasuring before you connect testleads to high-voltage points.

• Never connect to a voltage sourcewhen you select the diode check,

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CONTENTSA Word About Safety ..... 2Safety Marks ................. 4Preparation .................... 5

Installing Batteries ..... 5Connecting theTest Leads ................. 5

Operation ...................... 6Taking AccurateMeasurements ........... 6Turning the MeterOn/Off andTesting the Display .... 6Before You Start ......... 7Holding aMeasurement ............. 9AutomaticPower Off ................. 10UsingPower Lock .............. 10Using theBar Graph ................. 11

MakingMeasurements ............ 12

MeasuringDC/AC Voltage ........ 12MeasuringDC/AC Current ........ 14MeasuringResistance ............... 15CheckingContinuity ................. 16Checking Diodes ..... 17CheckingBatteries .................. 18

Care ............................ 20Cleaning .................. 20Replacing the Fuse .. 20

Specifications .............. 21

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continuity function, resistancemeasurement, or any of the battery testor current measurement functions.

• Always discharge any capacitors of thecircuit under test before you attach testleads.

• Always turn off power and disconnect thetest leads from the circuit before repla-cing the meter’s batteries or the fuse.

• Never operate the meter unless itsback cover and battery cover are fullyclosed and the screws fully tightened.

• Because many AC/DC sets have apotentially hot chassis, be sure the topof your workbench and the floorunderneath it are made of non-conductive materials.

This meter is fully calibrated and tested.Under normal use, no further adjustmentshould be necessary. If the meter requiresrepair, do not try to adjust it yourself. Take itto your local RadioShack store. o Ô The UL mark does not indicate that thisproduct has been evaluated by UnderwritersLaboratories for the accuracy of its readings.

Your meter requires three AAA batteries (notsupplied).

Your meter also has these additionalfeatures.

Auto Power Off — the meter turns itself offafter about 30 minutes if you do not changeany setting, helping conserve battery power.

Auto-Polarity Operation — protects yourmeter and gives valid measurements whenyou connect the leads in reverse polarity.

o WARNING o • USE EXTREME

CAUTION IN THEUSE OF THISDEVICE, IMPROPERUSE OF THISDEVICE CANRESULT IN INJURYOR DEATH.FOLLOW ALLSAFEGUARDSSUGGESTED INTHIS OWNER’SMANUAL INADDITION TONORMAL SAFETYPRECAUTIONS INDEALING WITHELECTRICALCIRCUITS. DO NOTUSE THIS DEVICEIF YOU AREUNFAMILIAR WITHELECTRICALCIRCUITS ANDTESTINGPROCEDURES.

• IF THIS EQUIPMENTIS USED IN AMANNER NOTSPECIFIED BY THEMANUFACTURER,THE PROTECTIONPROVIDED BY THEEQUIPMENT MAYBE IMPAIRED.

• TO REDUCE THERISK OF FIRE ORSHOCK HAZARD,DO NOT EXPOSETHIS PRODUCT TORAIN ORMOISTURE.

• FOR INDOOR USEONLY.

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Safety

Marks

Diode-Check Function — The metersafely checks semiconductor junctions foropens, shorts, or normal.

Battery Test Function — Lets you easilytest batteries under load condition.

Overload and Transient Protection —helps protect the meter from accidentaloverload in most ranges.

SAFETY MARKSFor your safety, we have added special markings to the meter’s panel toremind you of the measurement limitations.

CAUTION • Completely read this

manual before usingthe meter.

• This meter passesthe stringent safetytests required byUnderwritersLaboratories.

The maximum current that this meter can measure atthis jack is 400 mA DC and AC.

Caution: Be extra careful when making high-voltage measurements; DO NOT TOUCHTERMINALS OR PROBE ENDS.

Caution: Risk of electric shock! Refer to thecomplete operating instructions.

The meter is protected by double insulation.

CAT II This equipment is rated for INSTALLATIONCATEGORY II (3600VA max.).

The maximum voltage that this meter can measure is600V RMS AC or 600V DC. To avoid electric shock orinstrument damage, do not connect the two input ter-minals (–COM and +V.Ω.mA) to any source thatexceeds 600 volts with respect to earth/ground.

10A MAX.UNFUSED

The maximum current you can measure at this jack is10 amps DC/AC. This jack is not fuse-protected.

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PREPARATION

INSTALLING BATTERIESYour meter requires 3 AAA batteries (notsupplied) for power. Batteries are availableat your local RadioShack store or online atwww.radioshack.com. o Ô

1. Set the function dial to OFF. Thenunplug the test leads.

2. Use a Phillips screwdriver to loosen thebattery cover’s screw on the back of themeter. Then remove the battery cover.

3. Install the batteries according to thepolarity markings (+ and –) in thebattery compartment.

4. Replace the battery compartmentcover and secure it with the screw.

When; appears on the left side of thedisplay or the meter stops operatingproperly, replace the batteries.

CONNECTING THE TEST LEADSThe test leads (blackand red) supplied withyour meter are ratedfor 1000 volts. Useonly test leads of thesame rating as themeter. You can orderreplacement leadsfrom your local RadioShack store. o

o WARNING o • To avoid electrical

shock, disconnectboth of the test leadsfrom any equipmentbefore you install orreplace the meter’sbatteries.

• Do not operate themeter until thebatteries are properlyinstalled and the backcover is in place andsecured.

Ô BATTERY NOTES Ô• Dispose of old

batteries promptlyand properly.

• Do not burn or burybatteries.

• Use only freshbatteries of therequired size andrecommended type.

• Do not mix old andnew batteries ordifferent types ofbatteries (standard oralkaline).

• If you do not plan touse the meter for amonth or more,remove the batteries.Batteries can leakchemicals that candestroy electronicparts.

Black Test Lead

Red

LeadTest

o WARNING o • Although the test

leads are rated for1000 volts, do not tryto measure anyvoltage greater than600 volts DC/600volts RMS AC.

• If you connect onetest lead to a hot wirefirst and touch theother test lead tip,you could receive anelectric shock.

Operation

6

1. Remove the plastic plugs from both testleads.

2. Plug the black test lead’s right-angled endinto –COM (common) on the front of the meter.

3a. Plug the red test lead’s right-angled endinto +V.Ω.mA on the front of the meter.

OR

3b. To measure current higher than 400 mA,plug the red test lead’s right-angled end into+ 10A MAX on the front of the meter. Ô

OPERATION

TAKING ACCURATE MEASUREMENTSFor the most accurate reading, thetemperature should be between 65° and83°F (18° and 28°C) (75% RH maximum).

TURNING THE METER ON/OFF AND TESTING THE DISPLAYTo turn on the meter, rotate the function dialto any function except OFF. To turn off themeter, rotate the function dial to OFF.

To test the meter’s display, turn off themeter, and then hold down any button whileturning on the meter. The meter turns onand all segments on the display appear.Release the button you are holding down toturn off the test.

CAUTION • Be sure to select the

correct functionbefore you touch thetest leads to thecircuit or componentto be tested.

• When the meter is notin use, always leavethe function dial set toOFF.

Ô NOTE Ô • The meter sounds a

warning tone whenyou set it to measureanything exceptcurrent and connecta test lead to + 10AMAX. This remindsyou not to touch thecircuit with the testleads.

• If the function dial isnot set to OFF andnothing appears onthe display, the metermight be in its autopower shut-off mode.Press any button orrotate the functiondial to any positionexcept OFF to turn onthe meter. If themeter remains off,set the function dialto OFF then set it toany function exceptOFF. If the meter stillremains off, replacethe batteries (see“Installing Batteries”on Page 5).

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BEFORE YOU STARTFamiliarize yourself with the meter’soperation before you use it for the first timeby following these steps. o

1. Rotate the function dial to select one ofthe following measurements, thenrepeatedly press SELECT to choose thefunction you want.

For example, to measure a diode,rotate the function dial to ¹/§/Ω thenpress SELECT twice. § appears.

Measurement Function (select using SELECT button)

1. Measures DC voltage.

2. Measures AC voltage.

1. Measures amperage:

• DC 40/400 mA• AC 40/400 mA

2. Measures amperage:

• DC 4/10 A• AC 4/10 A

¹/§/Ω 1. Measures resistance.

2. Checks continuity.

3. Checks diodes.

AA/C/D

Tests 1.5V C, D, and AAbatteries.

AAA Tests 1.5V AAA batteries.

Tests 9V batteries.

o WARNING o Always turn off power tothe circuit you are aboutto measure before youconnect the test leads tohigh voltage.

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mA/A

9V

Operation

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Your meter automatically enters theauto range mode when you turn it on.In the auto range mode,appears and the meter automaticallyselects the next higher or lower range(if available) when the measurementcauses the display to overflow orunderflow. Ô

1.2. To select manual range mode, press

RANGE while the meter is in auto-rangemode. disappears.

3. Repeatedly press RANGE to selectdifferent ranges. The decimal pointshifts each time you press RANGE.

4. Hold down RANGE for about 2 secondsto exit manual range mode and returnto its auto-range mode.

5. Set the meter to the differentmeasurement ranges. The unit ofmeasure that appears on the displayshows the range that the meter iscurrently set to.

For example, mV appears in the 400mV range. Also, note the position of thedecimal. For example, if 0.000Vappears, the meter is set to measureless than 4 volts. If 000 V appears, themeter is set to measure up to 600 volts.

AUTOÔ NOTE Ô

• Overflow is when themeter tries to display4001 or more units.Underflow is whenthe meter tries todisplay 379 or fewerunits.

• If nothing appears onthe display, pressany button to turn onthe meter.

• The display mightshow a “phantom”reading in some DCand AC voltageranges when the testleads are notconnected to acircuit. This isnormal. The highinput sensitivityproduces a“wandering” effect.When you connectthe test leads to acircuit, a realmeasurementappears.

AUTO

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Read the range in volts, amps, or ohmsas indicated by the position of thedecimal point. Ô

6. Connect the black test lead then thered test lead to the circuit you want tomeasure. To measure different circuits,see “Making Measurements” onPage 12. Ô

HOLDING A MEASUREMENTPress HOLD to hold all indications on thedisplay. The meter holds the measuredvalue and Hold appears on the display evenif you remove the test leads from the circuit.

Range Display

400 mV ddd.d mV

4 V d.ddd V

40 V dd.dd V

400 V ddd.d V

600 V ddd V

40 mA dd.dd mA

400 mA ddd.d mA

4 A d.ddd A

10 A dd.dd A

400 Ω ddd.d Ω

4 kΩ d.ddd kΩ

40 kΩ dd.dd kΩ

400 kΩ ddd.d kΩ

4 MΩ d.ddd MΩ

40 MΩ dd.dd MΩ

Ô NOTE Ô +V.Ω.mA is fuse-protected. If the meterdoes not work, checkthe fuse (see “Replacingthe Fuse” on Page 20).

CAUTION If O.F (overflow) appears,the value you aremeasuring exceeds therange you set, or you donot have the test leadsconnected to acomponent when themeter is set to itsresistance or diodefunction.This is normal when youmeasure resistance or adiode with O.F appears.If you are measuringvoltage or current whenO.F appears, however,immediately disconnectthe test leads from thecircuit.

Operation

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To cancel hold, press HOLD again or set thefunction dial to another setting. Holddisappears.

AUTOMATIC POWER OFFYour meter conserves power byautomatically turning off about 30 minutesafter the last time you changed the setting(even if you are making measurements),The meter beeps as it turns itself off.

To turn the meter on after it automaticallyturns off, press any button or select anotherfunction. oUSING POWER LOCKFollow these steps to set the meter so that itdoes not turn off automatically.

1. Rotate the function dial to OFF to turnoff the meter.

2. Hold down HOLD and SELECT at thesame time, then turn on the meter. PLocappears.

3. Release HOLD and SELECT. PLocdisappears and appears.

To reset the meter so that it automaticallyturns itself off, turn off the meter then turn iton. disappears.

o WARNING o Do not change thefunction dial’s settingwith the meter’s leadsconnected to the circuitunder test.

PWRLock

PWRLock

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USING THE BAR GRAPH

In addition to the numeric display, the meterdisplays all measurements on a bar graphwhich consists of 8 segments at the top ofthe display.

Each segment represents a value of 500when you measure voltage, current,resistance and diodes. Ô

Segments of the bar graph also appearwhen the reading is above 0.8 volts for 1.5volt C/D/AA/AAA size batteries or above 4.8volts for 9V batteries.

One segment of the bar graph appears foreach 0.1 volt if you are measuring C, D, AA,and AAA batteries. One segment of the bargraph appears for each 0.6 volts, if you aremeasuring 9-volt batteries. If all segments ofthe bar graph appear, the battery beingmeasured is fresh.Ô

For example, if you are measuring DCvoltage and the displayed value is 2.560volts, 6 segments appear on the bar graph.

BarGraph

Ô NOTE Ô • Each segment of the

bar graph representsa unit ofmeasurement usedby the meter for thefunction youselected. Thesegments do notrepresent the actualnumber of volts,ohms, and currentmeasured by themeter.

• The bar graphupdates about 4times per second,providing a betterindication of levelsand trends fordifferent types ofmeasurements.

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MAKING MEASUREMENTS

MEASURING DC/AC VOLTAGE o

1. Set the function dial to .

2. Repeatedly press SELECT to select DCor AC. appears for AC voltagemeasurement.

If the meter is set to automatic rangecontrol, the meter automatically movesto the range that gives the bestreading.

3. To set manual range control, pressRANGE. Then change the range (ifnecessary) by repeatedly pressingRANGE.

4. Touch the black test lead then the redtest lead to the circuit you want to test.Ô

If the meter is set to the 400mV DC manualrange and you measure an overrange input,OF continues to appear even after youremove the input. This is not a malfunction.If this happens, touch the test leads togetheror change the meter’s setting to clear it. Ô

o WARNING o • When measuring high

voltages, alwaysclamp the meter’sblack test lead toground or neutralfirst, then the red testlead second. (The hotwire is usuallycolored red, black, orblue in AC wiringcircuits). If one lead isclamped to the hotwire first and youtouch the meter’sother test lead, youcould receive anelectric shock.

• The maximum inputlimit for voltagemeasurement is600 V DC/AC (RMS).To avoid electricalshock and damage tothe meter, never try tomeasure a DC voltageabove 600 volts or anAC voltage above600 volts RMS withrespect to ground.

V

Ô NOTE Ô When you measure DCvoltage, – appears onthe left side of thedisplay if you touch theblack test lead to a pointin the circuit that has ahigher voltage potentialthan the point whereyou connected the redtest lead.

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Measuring AC Voltage Riding On a DC Source Bias o

1. Disconnect power from the circuit youwill test.

2. Set the function dial to . The meterautomatically selects auto range andthe DC measurement mode.

3. Press SELECT to select the AC mode.appears.

4. Connect the black test lead to thecircuit’s neutral or ground lead.

5. Connect a 0.1 microfarad/100V mylarcapacitor in series with the positiveterminal of the voltage source and thered test lead.

6. Apply power to the circuit. The displayshows the AC voltage. o

7. When you finish measuring AC voltage,turn off the power of the circuit undertest, then disconnect the capacitor youconnected in Step 5.

Measuring Three-Phase AC VoltageYour multimeter is designed primarily tomeasure household AC voltages. If youwant to measure 3-phase, line-to-linevoltage, please note the following:

• Because of the dangers inherent inmeasuring three-phase circuits, westrongly recommend you do not usethis meter for such applications.

• The actual voltage can be greater thanthe circuit’s rated line-to-ground voltage.

CAUTION Before measuring ACvoltage riding on a DCsource bias, measurethe DC voltage first. If itexceeds 100V, stopmeasuring.

V

Ô NOTE Ô In the 400 V and 400mVranges, the decimalpoint appears in thesame position (oneplace to the left). Todistinguish between thetwo ranges, mV appearsin the 400mV range andV appears in the 400 Vrange.

o WARNING o • To avoid injury or

damage to yourmeter, never try tomeasure an ACvoltage that is ridingon a DC source biaswhere the peak ACvoltage exceeds 100V with respect toearth ground.

• To avoid electricalshock, do notphysically touch thetest leads, thecapacitor, or thecircuit under testwhile applying power.

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Three-phase industrial circuits are extremelypowerful. You can be burned severely andeven killed if you create an accidental shortin these panels.

Before measuring voltages, put onprotective clothing – a face shield andfireproof gloves and upper body protection isrequired. If you do not have this protection,DO NOT MEASURE THESE CIRCUITS.

Most 3-phase power circuits are rated bytheir line-to-line voltage. This voltage ishigher than the line (or phase) to groundvoltage. To determine if a line-to-line 3-phase voltage exceeds the rating of thismeter, multiply the rated line-to-groundvoltage by 1.732 (the square root of 3). Forexample, if the rated line-to-ground voltageis 400 volts, the line-to-line voltage is 400 ×1.732 = 692.8 V AC. oMEASURING DC/AC CURRENTTo measure AC or DC current, you mustbreak the circuit and connect the test leadsto two circuit connection points. Theconnection must be in series with the circuitunder test. o

1. Disconnect power from the circuit youwill test and discharge all capacitors.

2. Rotate the function dial to .

3. Repeatedly press SELECT to select DCor AC. appears for AC currentmeasurement.

4. Connect the black test lead to one ofthe two connection points on thebroken circuit.

o WARNING o • This voltage (692.8V

AC) exceeds themeter’s rating.Therefore, you shouldnot connect the meterto this circuit or to anyequipment connectedto the circuit. Doingso could present adangerous shockhazard to you, andcould also damagethe meter.

• When the meter is setto its currentmeasurementfunction, do not applyvoltage directlyacross terminals. Youmust connect themeter in series withthe circuit.

CAUTION • When the meter is set

to its current measure-ment function, neverconnect the test leadsacross a voltagesource. Doing so candamage the meter orthe circuit under test.The maximum inputlimit for AC/DC currentmeasurement is 10A.

• If you do not know theamount of current inthe circuit you aremeasuring, alwaysconnect the red testlead to + 10A MAX.

mA/A

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5. To measure current larger than 400mA, plug the red test lead into +10 AMAX. Otherwise, plug the red test leadinto +V.Ω.mA. Then connect the red testlead to the other connection point onthe broken circuit.

6. Apply power and read the results onthe display. Ô

MEASURING RESISTANCEThe resistance measuring circuit in yourmeter compares the voltage gained througha known resistance (internal) with thevoltage developed across an unknownresistance.o

1. Disconnect power from the circuit youwill test and discharge all capacitors.

2. Rotate the function dial to ¹/§/Ω.

3. Repeatedly press SELECT to set themeter to measure resistance.Ω, KΩ, or MΩ appears.Ô

4. Connect the black test lead to one leadof the component you want tomeasure.

5. Connect the red test lead to the otherlead of the component you want tomeasure, or remove one of the leads ofthe component you want to measurefrom its circuit and touch the test leadsacross the component. If the meter isset to automatic range control, itautomatically moves to the properrange. Ô

Ô NOTE Ô • When you are

measuring current, ifyour measurementexceeds the currentlyselected range, O.Fappears until themeasured voltage orcurrent is reduced toa value below thecurrently selectedrange.

• If the measuredcurrent’s polarity isnegative, – appearsbefore the value.

o WARNING o Be sure the circuit undertest has all powerremoved and anyassociated capacitorsare fully dischargedbefore you makeresistancemeasurements.

CAUTION Your meter has a circuitto protect the resistancerange from over-voltage.However, to preventaccidentally exceedingthe protection circuit’srating and to ensure acorrect measurement,never connect the testleads to a source ofvoltage while thefunction dial is set to¹/§/Ω.

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As with the voltage range, use themeasuring units that appear on thedisplay to determine the currentresistance range. If only Ω appears, thevalues of the measurements are inohms. If k and Ω appear, the meter ismeasuring kilohms (1 kilohm = 1000Ω).If M and Ω appear, the meter ismeasuring megohms (1 megohm =1,000,000 Ω).

CHECKING CONTINUITY You can use the meter to check for shortedor open electrical circuits.

1. Disconnect power from the circuit youwill test and discharge all capacitors.

2. Rotate the function dial to ¹/§/Ω.

3. Repeatedly press SELECT to select thecontinuity function. ¹ appears on theright side of the display.

4. Connect the black test lead to one sideof the circuit you want to check.

5. Connect the red test lead to the otherside of the circuit you want to check.Shrt appears and the buzzer sounds ifthe circuit resistance is less than about50 ohms (meaning the circuit has lowohmage or is shorted). Open appearsand the meter’s buzzer does not soundif the circuit resistance is greater thanabout 50 ohms (meaning the circuit isnot shorted and greater than about 50ohms).

Ô NOTE Ô • The jack labeled

+V.Ω.mA is fuse-protected. If themeter cannotmeasure in 40/400mA ranges,check the fuse (see“Replacing the Fuse”on Page 20).

• With no resistanceconnected across thetest leads (meaningresistance is infinite),O.F appears whenyou set the meter tomeasure resistance.This is normal.

• If you want to set themeter to manualrange mode, pressRANGE to setmanual range modeand repeatedly pressRANGE to changethe range.

• If you are measuringresistance of about1MΩ or more, thedisplay might take afew seconds tostabilize. This isnormal.

CAUTION Do not connect the testleads to a source ofvoltage with the functiondial set to ¹/§/Ω. Thiscould damage the meteror the circuit beingconnected.

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CHECKING DIODESThis procedure lets you check diodes,transistors, and other semiconductors foropens, shorts, and normal operation. It alsolets you determine the forward voltage andpolarity for diodes. (This is handy when youneed to match a diode).

1. Disconnect power from the circuit youwill test and discharge all capacitors.

2. Rotate the function dial to ¹/§/Ω.

3. Repeatedly press SELECT to select thediode function. § appears on the rightside of the display.

4. Connect the black test lead to thecathode or one pin of the componentyou want to check.

5. Connect the red test lead to the anodeor the other pin of the component youwant to check, or remove one of theleads of the component you want tomeasure from its circuit and touch thetest leads across the component. Thennote the first reading.

6. Reverse the test leads and note thesecond reading.

If one reading shows a value and theother is overrange (.OF appears) thedevice is good. If .OF appears duringboth readings, the device is open. Ifboth values are very small or zero, thedevice is shorted. Ô

Checking Diode PolarityMany diodes have a stripe or mark on oneside. The marked side of the diode indicates

CAUTION Do not connect the testleads to a source ofvoltage with the functiondial set to ¹/§/Ω. Thiscould damage the meteror the circuit beingconnected.

Ô NOTE Ô • When you test most

semiconductors, thevalues might varydepending on thetemperature.

• The values thatappear during adiode check showthe actual forwardvoltage (max. 1.2V).If the voltageexceeds 1.2V, O.Fappears. This meansthe diode checkcannot be madeusing this meter.

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the diode’s cathode or negative (–) side. Theother side is the anode or positive (+) side.

If a diode is not marked, you can use yourmeter to check the diode’s polarity. As youfollow the steps under “Checking Diodes” onPage 17, connect the black test lead to oneside, connect the red test lead to the otherside, then measure and note the voltage.Then reverse the test leads, and measureand note the second reading. The side of thediode where the meter shows a highervoltage using the red test lead is the anode(+) side.

CHECKING BATTERIESThe meter can accurately check batteriesunder designated load conditions. You canuse the meter to test 1.5V C-, D-, AA-, andAAA-size batteries and 9V batteries.

1. Rotate the function dial to one of thesesettings, depending on the battery youwant to check.

If The Battery You Are Checking

Is a ...

Rotate the Function Dial To ...

AA, C, or D AA/C/D

AAA AAA

9V

CAUTION While the function dial isset to any battery checkfunction, do not connectthe test leads to a sourceof voltage that is not abattery listed in thissection. This coulddamage the meter or thecircuit being connected.

9V

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2. Connect the black test lead to thebattery’s negative (–) terminal and the redtest lead to the battery’s positive (+)terminal. Then use this table todetermine the battery’s charge. Ô

Battery Size Range Display Action

AAAAACD

< 1 volt Bad and thenumber ofvolts appear.

Replacebattery.

1 – 1.1 volts Goodflashes andthe numberof voltsappears.

Considerreplacingbattery.

1.1 – 1.5volts

Good andthe numberof voltsappear.

Battery isgood.

> 1.5 volts Good andthe numberof voltsappear.

Battery isfull.

9V < 6 volts Bad and thenumber ofvolts appear.

Replacebattery.

6 – 6.6 volts Goodflashes andthe numberof voltsappears.

Considerreplacingbattery.

6.6 – 9 volts Good andthe numberof voltsappear.

Battery isgood.

> 9 volts Good andthe numberof voltsappear.

Battery isfull.

Ô NOTE Ô • When testing 1.5V C,

D, AA and AAA sizebatteries, if thebattery’s voltage isbelow 0.010 volts,Bad or Good do notappear.

• When testing 1.5V C,D, AA and AAA sizebatteries, if thebattery’s voltage isabove 2 volts, .OFappears until themeasured voltage isreduced to a valuebelow 2 volts.

• When testing a 9Vbattery, if thebattery’s voltage isbelow 0.10 volts,Bad or Good do notappear.

• When testing a 9Vbattery, if thebattery’s voltage isabove 11 volts, .OFappears until themeasured voltage isreduced to a valuebelow 11 volts.

• The jack labeled+V.Ω.mA is fuse-protected. If themeter does notmeasure properly,check the fuse (see“Replacing the Fuse”on Page 20).

• If you connect thetest leads in reversepolarity, – appearson the left side of thedisplay.

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Care

CAREKeep the meter dry; if it gets wet, wipe it dryimmediately. Use and store the meter only innormal temperature environments. Handlethe meter carefully; do not drop it. Keep themeter away from dust and dirt, and wipe itwith a damp cloth occasionally to keep itlooking new.

CLEANINGTo keep the meter looking new, occasionallywipe it with a cloth slightly dampened withwater. Do not use harsh chemicals, cleaningsolvents, or strong detergents to clean themeter. oREPLACING THE FUSEIf the meter does not operate, you mightneed to replace the fuse with the suppliedspare fuse.

o WARNING o • Do not let any water

drip inside the meterwhile cleaning it.

• Make sure that themeter is completelydry before using it.

CAUTION Do not use a fuse brand orrating other than thesespecified here. Doing somight damage your meter.

SpareFuseRed

Bottom View

RibbonFuse

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The meter contains a 5 × 20mm, 500mA,250V ceramic fuse (Radio Shack Cat. No.270-1070). o

1. Set the function dial to OFF and unplugthe test leads.

2. Use a Phillips screwdriver to loosenboth screws on the back cover of themeter. Then lift off the cover.

3. To remove the fuse, gently pull the redribbon wrapped around it. The fusepops out.

4. If the fuse is blown, discard it and savethe red ribbon. Then remove the suppliedspare fuse, slip it into the ribbon, andinsert the fuse into the fuse holder.

5. Replace the back cover of the meterthen secure it with the screws.

SPECIFICATIONSAccuracies at 23°C ± 5°C, < 75% RH.

DC VOLTS (Maximum Measurement: 600V)400mV .................................... ± 0.5% of Reading,

± 4 in Last Digit

4V – 40V – 400V ................... ± 0.8% of Reading,± 4 in Last Digit

600V ....................................... ± 1.0% of Reading,

± 4 in Last DigitAC VOLTS (600 V RMS Maximum at 50/60Hz,Average responds, RMS calibrated, DC Coupled)400mV .................................... ± 1.2% of Reading,

± 5 in Last Digit

4V ........................................... ± 0.8% of Reading,± 5 in Last Digit

40 – 400V – 600V .................. ± 1.2% of Reading,

± 5 in Last Digit

o WARNING o To avoid electric shock,you must disconnect thetest leads before youremove the back cover.Do not operate yourmeter until the backcover is in place andsecured.

Specifications

22

DC CURRENT (Maximum Measurement: 10A)40mA – 400mA ...................... ± 1.2% of Reading,

± 4 in Last Digit

4A – 10A ................................ ± 1.5% of Reading,± 4 in Last Digit

AC CURRENT (Average responds, RMScalibrated, 10A maximum, DC Coupled)

40mA – 400mA ...................... ± 1.5% of Reading,± 4 in Last Digit

4A – 10A ................................ ± 2.0% of Reading,

± 4 in Last DigitRESISTANCE400 – 4k – 40kΩ .................... ± 1.2% of Reading,

± 4 in Last Digit400k – 4.0MΩ ......................... ±1.2% of Reading,

± 4 in Last Digit

40MΩ ...................................... ± 2.0% of Reading,± 4 in Last Digit

BATTERY TEST1.5V C/D/AA (150mA ± 10% load current) ............

± 5.0% of Reading, ± 4 in Last Digit

1.5V AAA (50mA ± 10% load current) ...................± 5.0% of Reading, ± 4 in Last Digit

9V Battery (10mA ± 10% load current) ..................± 5.0% of Reading, ± 4 in Last Digit

DIODE MODEOpen Circuit Voltage .............................. < 1.6VdcTest Current ................................ 0.8 mA (Typical)

CONTINUITY BEEPERContinuity (short): .......................<= 50 ± 30 OhmsOpen:.............................................> 50 ± 30 Ohms

Open Circuit: ..........................................<1.6 VoltsShort Circuit Current:................................< 1.0 mABeeper Volume (at 5 cm) ..................... 65 dB Min.

(audio scale)

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GENERALMaximum Common Mode Voltage .........................

600V DC or RMS AC

Battery Life (Alkaline) at 1 hour use per day ..........About 350 days

Sleep Mode timing ...................... 30 ± 10 MinutesRange Up Detect Value .......................... Overflow

( >4000 Counts)

Range Down Detect Value ................. 380 CountsLow Battery Indication ................ lower than 3.35V

± 0.35 V

Sleep Mode current ....................... 25 µA Normal,40µA Max.

Input Impedance (DCV/ACV) .................. 10 Mohm

Power Source ............................ 3 × AAA batteriesOperating Temperature .................. 41°F to 104°F

(+ 5°C to + 40°C)Storage Temperature ..................... – 4°F to 140°F

(– 20°C to + 60°C)Humidity ................... Maximum Relative Humidity

80% for temperatures up to 87.8°F(31°C), decreasing linearity to 50% relative

humidity at 104°F (40°C)Pollution Degree .................................................. 2

Altitude ....................... up to 6561.6 feet (2000 m)Dimensions (HWD) ........... 59/10 × 29/10 × 11/2 In.

(150 × 74 × 38 mm)Weight ................................... Approx 6 oz (170 g)Accessories ........... Spare F500mA/250V Fuse (1)

Shrouded Test Leads (Red/Black) (2)

Specifications are typical; individual unitsmight vary. Specifications are subject tochange and improvement without notice.

RadioShack CorporationFort Worth, Texas 76102

22-813AO0117AAA1

11A02Printed in China

Limited Ninety-Day WarrantyThis product is warranted by RadioShack against manufacturing defects in material andworkmanship under normal use for ninety (90) days from the date of purchase from Ra-dioShack company-owned stores and authorized RadioShack franchisees and dealers. EX-CEPT AS PROVIDED HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES ANDANY IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FIT-NESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE DURA-TION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN. EXCEPT ASPROVIDED HEREIN, RadioShack SHALL HAVE NO LIABILITY OR RESPONSIBILITY TOCUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY,LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFORMANCEOF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, INCLUD-ING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE,LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPE-CIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEENADVISED OF THE POSSIBILITY OF SUCH DAMAGES.Some states do not allow limitations on how long an implied warranty lasts or the exclusionor limitation of incidental or consequential damages, so the above limitations or exclusionsmay not apply to you.In the event of a product defect during the warranty period, take the product and the Ra-dioShack sales receipt as proof of purchase date to any RadioShack store. RadioShackwill, at its option, unless otherwise provided by law: (a) correct the defect by product repairwithout charge for parts and labor; (b) replace the product with one of the same or similardesign; or (c) refund the purchase price. All replaced parts and products, and products onwhich a refund is made, become the property of RadioShack. New or reconditioned partsand products may be used in the performance of warranty service. Repaired or replacedparts and products are warranted for the remainder of the original warranty period. You willbe charged for repair or replacement of the product made after the expiration of the war-ranty period.This warranty does not cover: (a) damage or failure caused by or attributable to acts of God,abuse, accident, misuse, improper or abnormal usage, failure to follow instructions, im-proper installation or maintenance, alteration, lightning or other incidence of excess voltageor current; (b) any repairs other than those provided by a RadioShack Authorized ServiceFacility; (c) consumables such as fuses or batteries; (d) cosmetic damage; (e) transporta-tion, shipping or insurance costs; or (f) costs of product removal, installation, set-up serviceadjustment or reinstallation.This warranty gives you specific legal rights, and you may also have other rights which varyfrom state to state.

RadioShack Customer Relations, 200 Taylor Street,6th Floor, Fort Worth, TX 76102

12/99