What sort of volts would I see with a voltmeter at the two hots when the SSR is not supposed to be on, but the PID is and it's all plugged in?
My electric setup is suddenly coming together, I'm in the testing phase now than I've got my whole 'box-o-electricity' setup. I've yet to plug it all into my element though. I've got 240v coming in, splitting 120v off to power the PID via a switch, then the two hots are going to a disconnect panel, then down to a dryer plug I've mounted within the box.
I can fire up the PID, everything working great there. I've testing (with a multimeter) the voltage across the two hot lines on the dryer plug exit of my box, 240v.
Good, I thought! However, I had the PID set to 40F and ambient was 72F. My RTD was plugged in and reading fine (72F). Should I see voltage at the terminal end of the box wiring only when the PID tells the SSR to heat things up, or is constant voltage there normal?
I sort of figured it would drop to 0v across the two hots until the PID 'out' turned on and it sent it's magic signal to open the SSR up.
Any advice is appreciated!