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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
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
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