[volt-nuts] AC Voltage Measurement Standards

[Todd Micallef]

The remark about calibrating the resistors was merely an example of how I
thought you may have been transferring the calibration of the 10V TVC. My
first thought was that you compared the 10V TVC to the next closest model
at fixed points. The inter-comparison would then continue from that model
to the next value down (or up).
I had a hard time trying to understand how that could be accurate, and the
thought of using a ratio transformer didn't cross my mind. Thanks for the
explanation.

I can see how the costs of calibrating a TVC can be so high. I am guessing
few labs possess the equipment to calibrate them and places like Ballantine
probably use NIST for their cals.

Todd





> as far as your comment re. calibrating a set of resistor cal from one
> calibrated one, whats wrong with it? if you do that with a stable voltage
> and by voltage divider measurement using the linearity of the 3458A, you
> end up with pretty decent accuracies. I cannot comment on the 242, just did
> some quick checks some time ago and my quick assessment then was it is
> worse/not better than the 3458a method.
>
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