juzeko said:thx! but i need shema of it, so i can make it myself
juzeko said:thx! but i need shema of it, so i can make it myself
Vic said:You could convert the 4-20 mA signal to 2-10 volts with a 500 ohm resistor. Then design a summing op amp circuit that will sum the 2-10 volts with a fixed negative voltage to get -10 to +10 volts out. The trick will be to get the gains correct for each of the signals. If you cannot do this, purchase one of the units suggested. Its not worth it to try and build one yourself.
Rich1955 said:For $100 use this it will do it for you.
http://web5.automationdirect.com/adc/Shopping/Catalog/Process_Controls/Signal_Conditioners/FC-33