Re: (ET) Diode Check my multi-meter checks voltage not resistance

["RJ Kanary" <rjkanary nauticom net>]

         A major shortcoming of sand based multimeters is their inability 
to properly assess a semiconductor junction . Most do not provide enough 
current, even in the alleged 'Diode Check' mode, to turn the junction 'on' .
          That's why I grab my trusty, half century old Simpson 260 ®. It 
CAN provide the current , and the results are without doubt . So , before 
condemning parts , verify the test results.
      Go get a cheap analog VOM, and follow the procedure outlined in the 
homeowner's Service Manual.

----- Original Message ----- 
From: "Allen Hunt" <allenhunt_2000 yahoo com>
To: <elec-trak cosmos phy tufts edu>
Sent: Saturday, April 23, 2005 9:00 PM
Subject: (ET) Diode Check my multi-meter checks voltage not resistance


> Hi Everyone,
>
> Thanks for all the previous help.  My new multi-meter
> (Greenlee DM-100) reports volts when you check a
> diode.  Doesn't seem to have an AC/DC selector for
> diode checking.  One diode gives a reading of .476 and
> the other is apparently bad.  The service manual says
> that the resistance is supposed to be at least 100:1.
> How does resistance equate to the volts?  BTW, I am
> looking for a replacement transformer.  (mine burnt to
> a crsp)
>
> Thanks
>
> Allen
>
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