Quote:
Originally Posted by Radio Wrangler
If 'right' means zero error, then it never can be right. There will always be some finite amount of uncertainty.
If 'right' means within the maker's spec, then it can be done, provided the uncertainty on the standard is small enough. Effectively the measureent uncertainty uses up pat of the mker's spec error allowance. If the avo movement spec is say+/-1% and your standard has 0.1% uncertainty, then you want the avo to read within +/-0.9% when the current shows exactly the correct value on the standard.
For hobby use, for fixing radios you don't need much accuracy. But if metrology is your hobby, then that's a wholly different game. I don't suppose anyone deeply into metrology would use an avo.
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I said similar earlier, regarding basic checking.
But, if you're working on test equipment, you'd better be sure of your measurements, otherwise things could degenerate.
Interested in you comment regarding the interest in Avos and metrology. How do you draw that conclusion?