[Boatanchors] DC Voltmeter Calibration

[Pete Lancashire]

An note, just because your meter shows 5.0000V on the 10V range, does not
mean it will show the
same on another range. I fixed a Triplett 630NA that had a damaged resistor
on one of its ranges.
All the other ranges read withing spec. this range was a good 10% off.



On Fri, Jan 8, 2016 at 6:35 AM, Pete Lancashire <pete at petelancashire.com>
wrote:

> 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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>
>