[volt-nuts] What really gets calibrated?

[J. Forster]

Many manuals I've seen have Calibration and Adjustment sections.

In general, 'If it ain't broke, don't fix it'.

Many adjustments are done via pots that do not have infinite resolution,
and adjusting them may not really improve matters, and could make matters
worse or less stable.

My inclination has always been not to touch any adjustment that soesn't
need it.

YMMV,

-John

===============



> I recently had it explained to me that "calibration" is really just
> checking a piece of gear against a known standard, to see if it meets the
> manufacturers specification. If it is outside specified values, then it
> gets "adjusted", not "calibrated".
>
> I can see that on the part of the calibration lab, it is easier and faster
> to simply check that a device meets spec and not have to spend time
> adjusting anything. It should also be less expensive for the customer.
>
> My question is, is just meeting spec good enough? If an instrument is
> capable of exceeding spec, shouldn't it be adjusted to the best standard
> available? In other words, if spec says 2 ppm, but it can be adjusted to 1
> ppm, wouldn't you want to do that?
>
> Joe Gray
> W5JG
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