jschapansky
Member
I have Installed a LOGO with an RTD card in 2 brewery hot water tanks. We use rtds and the logo to control the electric heat. It worked great for several months and has since started to drop in and out randomly. If I isolate either one independently, they work. I have gone through many hours of troubleshooting, I will list:
- checked all RTD wiring and connections
- changed RTDs out
- ensured all grounding and bonding of tanks is adequate
- ensured RTD shield wiring is ground at only one end
- replaced RTD card
- isolated each RTD onto seperate cards
- ensured steady 24v supply to RTD cards
I'm sure I have tried several other things but I am out of ideas... Any thoughts?
- checked all RTD wiring and connections
- changed RTDs out
- ensured all grounding and bonding of tanks is adequate
- ensured RTD shield wiring is ground at only one end
- replaced RTD card
- isolated each RTD onto seperate cards
- ensured steady 24v supply to RTD cards
I'm sure I have tried several other things but I am out of ideas... Any thoughts?