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Old 10-18-2010, 05:36 PM   #1
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Hello: I have a Sperry 350A multimeter and I am trying to check on a motorcycle rectifier. The current setting I'm using can be found with this image


And this is the measurements I am looking for. So is this the best setting to perform these measurements?

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Old 10-18-2010, 08:17 PM   #2
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you are on 2 volt dc scale.you want ohms scale.set it to 200 ohms.200 ohm scale is just below 2k

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Old 10-18-2010, 08:52 PM   #3
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Thanks so much for the direction. I saw the diode sign on the multimeter dial but why it never clicked given the symbol from the manual and the symbol on the meter is just goofy on my part. The rectifier seems fine so I'll check to see if the bike is charging off the stator next.

thanks again. I'll post here and give you an update.
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Old 10-19-2010, 10:29 AM   #4
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How did you check the rectifier? Rectifiers and diodes are not the same. Rectifiers convert AC to DC. Diodes allow current to flow in one direction only. Rectifiers are tested with the voltage setting (ac & dc) while diodes are checked using the diode function.
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Old 10-19-2010, 01:34 PM   #5
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Quote:
Originally Posted by J. V. View Post
How did you check the rectifier? Rectifiers and diodes are not the same. Rectifiers convert AC to DC. Diodes allow current to flow in one direction only. Rectifiers are tested with the voltage setting (ac & dc) while diodes are checked using the diode function.
Rectifiers are just diodes in certain configurations.

A "half wave" rectifier is just a diode placed in series with an AC circuit.

A "full wave" rectifier is a combination of diodes placed in series with an AC circuit.

You can test each "leg" of a full-wave rectifier to see if each diode is working correctly.

(more info: http://www.play-hookey.com/ac_theory/ps_rectifiers.html)
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Old 10-19-2010, 03:29 PM   #6
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You can test each "leg" of a full-wave rectifier to see if each diode is working correctly.
)
that would depend on how the rectifier is constructed. If it is an IC, chances are there is no way to check individual components of the unit.

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