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Resistor choice for voltage divider for ADC-20

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Resistor choice for voltage divider for ADC-20

Postby Jeff Spedding » Wed Jan 14, 2009 6:19 pm

Hi!

I want to measure up to 20v on one channel using an ADC-20 fitted with input board. This normally allows me to measure +/- max 2.5v. Can anyone recommend resistor pair values to add to the board to function as voltage divider? A measurement of 2v would be OK. I can calculate it but if anyone can recommend from experience that would be great.

Thanks
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Postby ziko » Thu Jan 15, 2009 1:33 pm

HI Jeff,

The ADC20/24 terminal board does not give any specific values but does point out the combined resistances should be much greater than the resistance of the voltage source.

http://www.picotech.com/document/pdf/ad ... _guide.pdf

Kind regards
Ziko

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