Resistor choice for voltage divider for ADC-20

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Jeff Spedding
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Joined: Fri Jan 09, 2009 4:08 pm

Resistor choice for voltage divider for ADC-20

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


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.


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Post by 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. ... _guide.pdf

Kind regards

Technical Specialist

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