StMarcos
Well-Known Member
I have a few watlow SD series controllers. One thermowell in the fermenter. I thought this would be fine... but the temp swing in my shed enough to require both heating and cooling in the same day. I want to share the 3-wire pt100 rtds between both pids. Yeh or neh? Would think it's ok, as they are just measuring the I-V relationship, but I'm not sure how the third wire is handled. I use 3-wire because I made my own cables with a pretty long run of doorbell wire....
Thanks...!
Thanks...!