OhmmetersOhmmeters

pages 75-80pages 75-80

VA x R

How much resistance in a How much resistance in a load if the amperage is:load if the amperage is:

.5 amps.5 amps

How much resistance in a How much resistance in a load if the amperage is:load if the amperage is:

3 amps3 amps

How much resistance in a How much resistance in a load if the amperage is:load if the amperage is:

250 amps250 amps

How much resistance in a How much resistance in a load if the amperage is:load if the amperage is:

.004 amps.004 amps

OhmmetersOhmmeters

pages 75-80pages 75-80

OhmmetersOhmmeters are are self poweredself powered

Ohmmeters are used Ohmmeters are used to test the resistance to test the resistance in components and in components and

they they must be must be disconnected disconnected from any from any

other power source.other power source.

Most common scalesMost common scales 200200 2K2K 20K20K

200K200K 2M2M 20M20M

Manual RangingManual Ranging

Auto RangingAuto Ranging

Out of range indication if Out of range indication if the resistance is higher the resistance is higher

than the scale you are on.than the scale you are on.

ULOUCH3

The Meter will round off The Meter will round off the reading if you are the reading if you are on too high of a scale.on too high of a scale.

This can make your readings This can make your readings somewhat somewhat inaccurateinaccurate

Circuit board assignmentCircuit board assignment

OhmmetersOhmmeters

pages 75-80pages 75-80

Ohmmeters are used to:Ohmmeters are used to: Test continuity in switchesTest continuity in switches

Continuity TestContinuity Test

Will beep with Will beep with approx. 30 ohms approx. 30 ohms or lessor less

Ohmmeters are used to:Ohmmeters are used to:

Test continuity in mercury switchesTest continuity in mercury switches

Ohmmeters are used to:Ohmmeters are used to: Test continuity in fusesTest continuity in fuses

Ohmmeters are used to:Ohmmeters are used to:

Test the continuity in resisters of Test the continuity in resisters of all typesall types

ExampleExampleThrottle position sensorThrottle position sensor

Ohmmeters are used to:Ohmmeters are used to:Test the resistance (to specifications) of Test the resistance (to specifications) of Throttle Position SensorsThrottle Position Sensors

Ohmmeters are used to:Ohmmeters are used to:Test Test PotentiometersPotentiometers of all types of all types

Ohmmeters are used to:Ohmmeters are used to:

test the continuity of test the continuity of temperature temperature switchesswitches

Ohmmeters are used to:Ohmmeters are used to:

Test the resistance (to specifications) Test the resistance (to specifications) of a of a thermistorthermistor

Ohmmeters are used to:Ohmmeters are used to:Test the resistance of Test the resistance of Solenoids Solenoids

Ohmmeters are used to:Ohmmeters are used to:Test the continuity and or resistance of Test the continuity and or resistance of

relays

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