[Boatanchors] DC Voltmeter Calibration

[rbethman]

Consider this:

NIST in Gaithersburg, MD - Sure aren't going to let you or anyone that 
doesn't belong there even remotely *close* to a REAL one!

Bob - N0DGN

On 1/7/2016 1:44 PM, hwhall at compuserve.com wrote:
> This is similar to what Mark Twain said about a man with more than one watch not knowing what time it really was. Without an absolutely reliable standard, who knows which meter is nearest to right?
>   
>
>   Wayne
> WB4OGM
>
> -----Original Message-----
> From: D C _Mac_ Macdonald <k2gkk at hotmail.com>
> To: WA5CAB, Robert Downs <wa5cab at cs.com>
> Cc: boatanchors <boatanchors at mailman.qth.net>
> Sent: Thu, Jan 7, 2016 11:38 am
> Subject: Re: [Boatanchors] DC Voltmeter Calibration
>
> I'd bet you'd get a lot closer than what you have already
> by using a cheap (sometimes even free) digital meter
> from Harbor Freight as a "standard for comparison."
>   
>
>> Date: Thu, 7 Jan 2016 13:02:11 -0500
>> To: boatanchors at mailman.qth.net
>> Subject: Re: [Boatanchors] DC Voltmeter Calibration
>> From: boatanchors at mailman.qth.net
>>
>> A quick and dirty way that will get you a lot closer than +/- 45 VDC would
>> be to rig up a VR-150 running at about 20 mA.
>>
>> In a message dated 01/07/2016 10:25:07 AM Central Standard Time,
>> dhallam at knology.net writes:
>>> 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
>> Robert & Susan Downs - Houston
>> wa5cab dot com (Web Store)
>> MVPA 9480
>