Practical, dual display, plug-in interchangeable modular systems Microprocessor-based self-tuning temperature controllers CompuStep® power control feature removes moisture from the heater before full power is applied CompuCycle® power control feature improves response time, reduces thermal fatigue and prolongs heater life by applying AC power smoothly and continuously. Built-in diagnostics – crossed heater wiring, crossed t/c wiring, heaters incorrectly wired, open t/c, reversed t/c, heater open circuit, power on, power to load, over/under temperature Ground Fault Interrupter monitors differential current between two heater leads Automatic shutdown, last output level or preset % output if thermocouple breaks Self-regulating manual power controllers Main frames field convertible to global power supply mains