[Boatanchors] DC Voltmeter Calibration

[hwhall at compuserve.com]

For this group, this is doubtless like the proverbial showing Grandma how to suck eggs...but don't forget to give those analog meter movements a couple of taps with the finger to ensure the movement settles to the best reading. Sometimes they will come to rest just a bit off of the most accurate reading.
 

 Wayne
WB4OGM

 

-----Original Message-----
From: David C. Hallam <dhallam at knology.net>
To: boatanchors <boatanchors at mailman.qth.net>
Sent: Thu, Jan 7, 2016 9:25 am
Subject: [Boatanchors] DC Voltmeter Calibration

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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