In 2011 I decided to build a PID controller for the lead pot. I chose the Auber SYL-2352 PID controller. Upon testing and setting the temperature I noticed the temp readings were off anywhere from 200-235F degrees. I was casting bullets in pure lead and alloy with readings of 920-975F degrees. Anything lower and incorrect fillout, any higher and frosting would start. I realized the true temperatures were probably in the 700's. It never really bothered me because I just wrote down what temps on the PID gave me good bullets depending on the alloy.
Well, after 7 years (go figure) its starting to bother me and I want to trouble shoot what is causing the inaccurate readings. The controller seems to be working perfectly except for the goofy readings, it holds temperature very well.
Any of our PID Gurus out there ever hear anything like this? Any ideas?
Thanks, Kurt