how to use a digital multimeter

How To Use A…

DigitalMultimeter

How To Use A…

Digital Multimeter

???

Wait, whatWait, what is is aaMultimeterMultimeter????

A MultimeterMeasures…

Voltage

Resistance

Current

CAUTION CAUTION CAUTION CAUTION CAUTION CAUTION CAUTION

CAUTION CAUTION CAUTION CAUTION CAUTION CAUTION CAUTION

Safety

1.

Always READthe Manual

2.

Know theEquipment

2.

Know theEquipment

…and the SafetyPrecautions forthe Equipment

3.Never Exceed

the InputRating of the

Meter

4.Only Touch the InsulatedParts of the Probes

4.Only Touch the InsulatedParts of the ProbesNOT THE

METALTIPS…

Why Not theMetal Tips?

Why Not theMetal Tips?

To avoidELECTRICAL

SHOCK OrINJURY!!!!!!

5. Always Keep your LeftHand Out of the Way

5. Always Keep your LeftHand Out of the WaySo that if you areSHOCKED the current

does not travel downthrough your VITAL

ORGANS

6. While taking High VoltageMeasurements…

Do NOT TouchANY of theEquipment

6. While taking High VoltageMeasurements…

Do NOT TouchANY of theEquipment

Because you couldconduct a

HAZARDOUSSHOCK

7. Always Stand on anInsulating Surface

Cardboard

7. Always Stand on anInsulating Surface

Cardboard

RubberSoles Work

As Well!

7. Always Stand on anInsulating Surface

Cardboard

To PreventSHOCK!

8.Never Work

Alone

8.Never Work

AloneSo if SomethingHappens,

Someone is thereto Help

9. Disconnect Leads fromVoltage Points BeforeChanging the Battery

9. Disconnect Leads fromVoltage Points BeforeChanging the Battery

Why?

To avoid…HAZORDUOS

SHOCK!!

Parts of the Meter

OFF

OFF

Leads

OFF

Leads

Input Terminals

OFF

LeadsMeter

Input Terminals

OFF

LeadsMeter

RotarySwitch

Input Terminals

OFF

LeadsMeter

Battery Compartment

RotarySwitch

Input Terminals

On the Back

The Symbols

COM !

DANGERHIGH VOLTAGE TERMINAL

!

!WARNINGSEE MANUAL

COM

COMCommonInput

Terminal

???

Read Manual ToSee which Lead

Gets Plugged Intothe COM

Read Manual ToSee which Lead

Gets Plugged Intothe COM

This is MeterSpecific

ContinuityBuzzer

???

Continuity TestsConfirm that your

Circuit is ElectricallyConnected

DiodeTest

???

A diode is a valve thatmakes electrical

current flow in onedirection. You can test

if a diode is workingwith your multimeter.

DCSymbol

ACSymbol

AC DCvs.

AC

AC

Alternating Current

AC

Alternating Current

CurrentPeriodically

ReversesDirection

DC

DCDirect Current

DCDirect Current

CurrentMoves in OnlyONE Direction

Connectingthe

Multimeter

To Measure: Current

To Measure: Current

OFF

To Measure: Current

OFF Connect inSeries

To Measure: Voltage

To Measure: Voltage

OFF

To Measure: Voltage

OFF Connect inParallel

To Measure: Resistance

To Measure: Resistance

OFF

To Measure: Resistance

OFF

Measure ResistorDisconnected from

the Circuit

Dial Settings

2 vs. 20 vs. 200

Know a Rough Estimate ofthe Setting Range

Hmmm…I think theVoltage is about 15v

Select the (2, 20 or200…) After

Conferring With theManual and Plug in

the Appropriate Leads

Select the (2, 20 or200…) After

Conferring With theManual and Plug in

the Appropriate Leads

Always Selectthe Highest

Setting Possible

So, a 20v Settingwould be Good!

Remember! If Testing forVoltage…

For AC SelectV

Remember! If Testing forVoltage…

For AC SelectV

For DC SelectV

Remember! If Testing forVoltage…

Now You KnowHow To Use aMultimeter!!