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PSoC™ 5, 3 & 1

JaRa_1183061
New Contributor II

Hi

I am using the ADC_DelSig in differential mode. I am interested in sampling the voltage between two metal electrodes in electrolysis (between 100 mV to 1 V). The ADC voltage is fluctuating a lot – most of the time giving random values.  My question is therefore, what could be wrong?

Here is my setup for the ADC.

JaRa_1183061_0-1633874356548.png

 

JaRa_1183061_1-1633874356553.png

Pin_1 is on metal 1 (positive) and pin_2 is on metal 2 (negative). I am using the ADC_DelSig_1_CountsTo_mVolts(ADC_DelSig_1_GetResult32()) function.

Thanks - 

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Len_CONSULTRON
Honored Contributor II

JaRa,

As Vasanth suggested, it is always useful when testing out your design to apply a known voltage on the electrodes.  This will allow you to verify the quality of your design before using it on a unknown test environment ( ie: electrolysis bath.)

Using a series of "known" voltages is also a good method of calibrating your system before putting it into use.

 

Len
"Engineering is an Art. The Art of Compromise."

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