Ohmmeters pages 75-80. V A x R How much resistance in a load if the amperage is:.5 amps.5 amps.

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Presentation transcript:

Ohmmeters pages 75-80

V A x R

How much resistance in a load if the amperage is:.5 amps.5 amps

How much resistance in a load if the amperage is: 3 amps

How much resistance in a load if the amperage is: 250 amps

How much resistance in a load if the amperage is:.004 amps

Ohmmeters pages 75-80

Ohmmeters are self powered

Ohmmeters are used to test the resistance in components and they must be disconnected from any other power source.

Most common scales n 200 n 2K n 20K n 200K n 2M n 20M

Manual Ranging

Auto Ranging

Out of range indication if the resistance is higher than the scale you are on. UL OUCH 3

The Meter will round off the reading if you are on too high of a scale. This can make your readings somewhat inaccurate

Circuit board assignment

Ohmmeters pages 75-80

Ohmmeters are used to: n Test continuity in switches

Continuity Test n Will beep with approx. 30 ohms or less

Ohmmeters are used to: Test continuity in mercury switches

Ohmmeters are used to: n Test continuity in fuses

Ohmmeters are used to: Test the continuity in resisters of all types Example Throttle position sensor

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

Ohmmeters are used to: Test Potentiometers of all types

Ohmmeters are used to: test the continuity of temperature switches

Ohmmeters are used to: Test the resistance (to specifications) of a thermistor

Ohmmeters are used to: Test the resistance of Solenoids

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

See Ya!