[volt-nuts] traceable calibration

[gbusg]

Hi Andreas,

You wrote:

>Under which conditions the instruments will be adjusted
>during calibration?
> When missing the 1 year spec or
>When missing the 24 hours spec?

Good question! The term "calibration" means different things in different 
disciplines and application of it varies by company and product even within 
a given discipline. In some disciplines, there's an expectation that the lab 
will *adjust* your instrument. But I think most of the time in electrical 
metrology the lab runs a *Performance Test" but does not adjust unless a 
parameter is out of tolerance (OOT). Some paper standards and/or customers 
require the lab to adjust if a parameter's value reaches the limit of a spec 
*guardband* limit. There has been much debate about this topic down through 
the years within metrology organizations and paper standards writing 
committees.

If you want to know how the German Keithley lab handles this topic with 
regards to Keithley 2000 calibration, you will have to ask them. Do please 
let us know what they tell you. (I'm curious too!)

Best,
Greg