how to use a digital multimeter
DESCRIPTION
TRANSCRIPT
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!!