otchu
Newbie
Hello .... here a very light version of my circuit (sorry for the bad drawing).
So on one pole of the SSR I have a potential of 450v DC. My goal is to measure the resistance of the 'charge' (0 to 500 ohm) with a uprocessor when I don't have the 450v (SSR close). When I start to have the 450v, I do open the SSR. My problem is every single SSR who can handle 450v have a Ron resistance who change with temperature (30 ohm at 20 degrees to 60ohm at 85 degrees) and I need less than 5% tolerance of my 'charge'reading ....
So on one pole of the SSR I have a potential of 450v DC. My goal is to measure the resistance of the 'charge' (0 to 500 ohm) with a uprocessor when I don't have the 450v (SSR close). When I start to have the 450v, I do open the SSR. My problem is every single SSR who can handle 450v have a Ron resistance who change with temperature (30 ohm at 20 degrees to 60ohm at 85 degrees) and I need less than 5% tolerance of my 'charge'reading ....
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