Bad resistors
in [Design]
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From: DrParnassus on 23 Jun 2010 02:20 On Tue, 22 Jun 2010 20:04:34 -0700, John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: > >What are you talking about? The spread on my measurements is under >half a per cent. Wrong. First you assume that the actual value of the part is as marked. Then you are apparently unaware of the error spec on your own meter, and then you are unaware of environmental error introductions, which happen in EVERY case. You lose, again. > The benchtop agrees with the '87 to a tenth of a per >cent at 1M and 5M. I am quite confident that you are unable to utilize that tool properly either. You are also likely unaware of its declared specs as well.
From: DrParnassus on 23 Jun 2010 02:21 On Tue, 22 Jun 2010 20:04:34 -0700, John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: > >Fingerprints are no problem at 1 Gohm (that's a thousand megohms to >you.) Well, depending on what's on your fingers. You're an idiot.
From: DrParnassus on 23 Jun 2010 02:24 On Tue, 22 Jun 2010 20:49:47 -0700, John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >The Extech measured the 1M and 5M resistors just fine. You think.
From: DrParnassus on 23 Jun 2010 02:28 On Tue, 22 Jun 2010 21:46:22 -0700, Robert Baer <robertbaer(a)localnet.com> wrote: >Jan Panteltje wrote: >> Got 10 resistors on tape marked 2M7. >> Used one, circuit did not work right. >> Took some testing ... before I measured the resistors. >> Of the 10 several are 620 k and not 2M7. >> Bought from www.voti.nl, so beware. >> All are marked with the right color code for 2M7. >> >> New to me :-) > If the resistors are bad, then tame them using a whip! Best response to this thread I have yet seen.
From: DrParnassus on 23 Jun 2010 02:29
On Tue, 22 Jun 2010 21:50:58 -0700, Robert Baer <robertbaer(a)localnet.com> wrote: >> > I bet the Extech will correlate rather well with the Flukes; i have >one and it reads within 0.2% worst case for all (valid) values except >when the value is less than a few hundred ohms where contact resistance >becomes part of the reading. Now try a battery of parts that are all between 2 Mohm and 20 Mohm. I'll bet your claim falls apart at that point. You cannot move the goal posts, twit. |