low resistance wheatstone

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designnut

Joined Apr 21, 2011
33
I designed digitasl meters with automatic 1 ohm steps. I took the wheatstone bridge apart and made 4 terminal connections to the unknown.
One lead was the supply return, it;s rresistance unimportsnt, connected to it at the unknown was the digital pot in one ohm steps to 9.99 ohms. the other end went to the range resistor, 10 times the unknown full scale. The chopperr detector connected there. I put a resistor 10 ttimes the digital pot and to the bridge supply. I haed 4 leadgold plated clips to connectt to the uknown. It measured to 9he low scale. It autoranged to 9.999 megohms.
E samuel Levy. I have never seen tthis connection.
 
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Wendy

Joined Mar 24, 2008
22,138
Feedback and Suggestions Forum for providing feedback and suggestions about All About Circuits, including corrections to the e-book. This forum is not for getting help with technical questions.
I'm not sure what point your are making or want to discuss?
 
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