Electronics > Metrology

KVD comparison endeavor

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VintageNut:
I recently added a Fluke 721A Lead Compensator to my volt nut rack.

The rack has two KVD. A DV-4107 and a DV-4107D. It is now set up to compare one KVD against the other.
The working hypothesis is that the newer model should be the reference divider.

I have adjusted the 721A so that there is a zero reading on the null meter for LO and HI lead compensation.

The voltage applied to the test is 10V from a Fluke 731B.

Below are the results for the most significant decade of the KVDs where each comparison is a balanced null.

Question: Is there an algorithm for checking a certain number of settings to be confident of the maximum deviation of the two KVDs?

Any comments or suggestions are welcomed.

DV4107   DV4107D
999999X   999999X
8999998   899999X
7999997   799999X
6999995   699999X
5999995   599999X
4999995   499999X
3999994   399999X
2999997   299999X
1999997   199999X
0999996   099999X

JS:
check all the... 10^7 combinations??  :horse: ok, maybe not.

Maybe the 9 combinations 1111111 counts apart from each other? Half up/half down looking for the max "INL" or deviation? Get a girl? Maybe she helps you?

JS

mycroft:
Try one of these references:

- Calibration of a Kelvin-Varley Voltage Divider http://ieeexplore.ieee.org/document/4313387/
- Calibration of a Kelvin-Varley Standard Divider http://ieeexplore.ieee.org/document/5006924/

VintageNut:

--- Quote from: mycroft on September 23, 2016, 10:36:10 am ---Try one of these references:

- Calibration of a Kelvin-Varley Voltage Divider http://ieeexplore.ieee.org/document/4313387/
- Calibration of a Kelvin-Varley Standard Divider http://ieeexplore.ieee.org/document/5006924/

--- End quote ---

Thanks for the references. It looks like you have to pay for these articles.
Anybody have a copy?

VintageNut:

--- Quote from: DiligentMinds.com on September 23, 2016, 03:01:37 pm ---
--- Quote from: VintageNut on September 23, 2016, 11:46:02 am ---
--- Quote from: mycroft on September 23, 2016, 10:36:10 am ---Try one of these references:

- Calibration of a Kelvin-Varley Voltage Divider http://ieeexplore.ieee.org/document/4313387/
- Calibration of a Kelvin-Varley Standard Divider http://ieeexplore.ieee.org/document/5006924/

--- End quote ---
pm sent
Thanks for the references. It looks like you have to pay for these articles.
Anybody have a copy?

--- End quote ---