Posted by Geo-TH,In on July 25, 2015 at 13:28:33 from (172.78.98.157):
In Reply to: Re: Burning points posted by John T on July 25, 2015 at 11:06:21:
JohnT, How can anyone with today's cheap EVOMs measure resistance accurately, you can't zero them? Short the leads together and they always show a few ohms, not zero. I remember you could zero the old analog ohmmeters, but ohm scale was the least accurate of all the scales. As a student working at USNAD crane, I used to calibrate them. Not sure, been a long time ago, but weren't thay only 5% of the full scale reading? Or something like that.
You and Guido may have the last two with working simpson 260 in existence, well I'm sure some one else will tell me I'm wrong. BYW, wasn't Columbus the first to bring 260s to this country?
That said, why not just measure the primary current? Even my cheapo, FREE HF meters, are more accurate measuring current vs ohms.
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