... machine, chemical, ceramic, light industry, metallurgy, petrifaction and heat treatmentTurn on soft startup and dehumidifying first, to protect heater ... be chosenWith AT auto-tuning, relay voltage (SSR) current (4-20 mA), PID reaction + pureproportion cooling two groups of ... operation can be set by panel. PTCD700 Intelligent temperature controller,Industry adjust controller,Digital Temperature Control