[Boatanchors] DC Voltmeter Calibration

[Pete Lancashire]

One can get AD584/588 references mount on board for China for under $10 but
there will be no verifcation

A much better US design good to +-01% (real number not a fake) can be had
for $30, checked against a
HP 8.5 digit meter that is in NIST calibration.





On Thu, Jan 7, 2016 at 8:03 AM, David C. Hallam <dhallam at knology.net> wrote:

> I obviously need to calibrate my DC voltmeters.  I was setting the 300 VDC
> B+ on my signal generation after some repairs.  I used 3 voltmeters and got
> a spread of 45V among the 3 of them, low 285V and high330V.  The low was a
> VTVM and the high  DVM.  What is a good standard to use that won't break
> the bank to acquire?  I used to have some mercury batteries but they are a
> no, no any more.
>
> David
> KW4DH
>
> --
> There are two possible outcomes: if the result confirms the hypothesis,
> then you've made a measurement.
> If the result is contrary to the hypothesis, then you've made a discovery.
> Enrico Fermi
>
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