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the best procedure to check ultra fast diode by analogmeter

 
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newone



Joined: 23 Dec 2005
Posts: 6

PostPosted: Sat Dec 24, 2005 7:47 am    Post subject: the best procedure to check ultra fast diode by analogmeter Reply with quote

the best procedure to check ultra fast diode by analogmeter

what is the best procedure?

how to know whith analog meter the diode is short or leckage
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Al_Dodge_Bundy



Joined: 05 Apr 2005
Posts: 93
Location: Netherlands

PostPosted: Wed Dec 28, 2005 11:20 pm    Post subject: Reply with quote

Can you measure resistance (Ohm) with your meter?

If so, a short should measure 0 - 10 Ohms
A good diode should measure infinitive resistance ( > 1000 M Ohms) in one direction and a few K Ohms in the other direction.

Grtz Mark
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awright



Joined: 10 Aug 2005
Posts: 20
Location: Oakland, California

PostPosted: Fri Dec 30, 2005 1:38 pm    Post subject: Checking ultra fast diodes Reply with quote

newone:

You can't check the SPEED of ultra-fast diodes with analog meters.

You can check forward/reverse conductivity to see if they are functioning basically like a diode, but that will tell you nothing about switching speed. You need a sampling 'scope to check rise and fall times.

Let us know if you are only trying to test for forward/reverse conductance or are trying to test for rise and fall times.

atwright
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PostPosted: Sat Jan 07, 2006 12:57 pm    Post subject: Re: the best procedure to check ultra fast diode by analogme Reply with quote

newone wrote:
the best procedure to check ultra fast diode by analogmeter

what is the best procedure?

how to know whith analog meter the diode is short or leckage

SET YOUR TESTER TO X10K ANY READING IN REVERSE SIMPLE MEANS LEAKAGES...OK?
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