I have just purchased an ADC-20 and terminal board.
I have an input of 48V DC and would like to log it.
I have purchased a 9530ohm (Ra) and a 499ohm (rb) resistor.
Does this sound correct?
The description for Ra says that the track underneath the resistor needs to be cut. (on my ADC-11, this was obvious), but where is it? There are two blue tracks running through the Ra label, but I have been unable to scrape this away.
I have been trying using a differential input, with Rb wired to the -5v on the right hand side (RHS).
Also, then when I try and use the next differential channel, it is affect by the reading of the first.
Finally, if I just want to monitor voltage, where should Rb be wired to on the RHS? AG, -5v or +5v. No success so far.