[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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