[volt-nuts] Fluke 732A Questions

[jeffhook at comcast.net]

Hi,  



Are you guys adjusting your 732As? 

I have a friend that works in a large CAL lab and he told me to never adjust my 732As, just compare them. 

They send out their 732 Bs to Fluke but are never adjusted, just compared and sent back with current voltage reading ?? 



Thanks - Jeff  



----- Original Message -----


From: "Charles Steinmetz" <csteinmetz at yandex.com> 
To: "Discussion of precise voltage measurement" <volt-nuts at febo.com> 
Sent: Tuesday, December 31, 2013 9:56:37 AM 
Subject: Re: [volt-nuts] Fluke 732A Questions 

Joe wrote: 

>Where did you find the resistance of the thermistor 'as shipped'?  I saw 
>mention of being supplied to the original owner when shipped as well 

It was recorded on the original factory cal certificate.  I have the 
original certificates for two of mine.  The others had rear panel 
stickers applied by their original owner (a cal lab). 

A properly working, good example should hold 0.1 ppm or better year 
in, year out.  I've seen some that do not meet that, but lots of them 
do.  I'm not aware of any other non-JJ standard that can match it, 
including most 732Bs.  (Some folks think 732As are generally better 
than 732Bs because they are older and, thus, more stable because 
better aged.  I think there is more to it -- many 732Bs are plenty 
old enough to have settled down to that level if they are ever going 
to, but even the older 732Bs don't, in general, seem to exhibit quite 
the stability of the 732As.) 

Best regards, 

Charles 



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