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

["Herb Crary" <jhcrary comcast net>]

What in the world is a sand based meter?

Herb Crary    Boulder CO

----- Original Message ----- 
From: "RJ Kanary" <rjkanary nauticom net>
To: "Allen Hunt" <allenhunt_2000 yahoo com>; 
<elec-trak cosmos phy tufts edu>
Sent: Saturday, April 23, 2005 8:03 PM
Subject: Re: (ET) Diode Check my multi-meter checks voltage not resistance


         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
>
> _______________________________________________
> Elec-trak mailing list
> Elec-trak cosmos phy tufts edu
> https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak


_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak