[Boatanchors] Voltage Calibrator

[Al Klase]

David,

The voltage reference in modern DMM's is based on quantum mechanical 
principles.  It's really hard for them to be off by much, even the 
extremely cheap ones.

The old Heathkit rule of thumb was that a fresh carbon-zinc cell would 
read something like 1.56 volts.  Modern alkaline cells read a bit 
higher.  The Duracell I just took out of the package read 1.612 on my 
trusty Fluke 77.

So check that your DMM isn't broken, and trust it to calibrate the 
analog instrument.

Al

On 12/29/2011 11:27 AM, David C. Hallam wrote:
> What is a good DC voltage source that doesn't cost big bucks to use to
> calibrate a VTVM?  I can't afford several hundred dollars for a piece of
> test equipment with such limited use as a voltage calibration source.
>
> David
> KW4DH
>

-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/