1.Universal Input 2. PID auto-tuning 3. 0.2%FS 4. Output Relay, SSR, mA ... multiple unit synchronous setup; 7. Output percentage restriction function and manual/automatic non-disturbance switching; 8. Automatic diagnosis function, capable ... phase or 3-phase controlControlControl mode: PID, ON/OFF, Phase PID, continuous PID, self-regulated PID, fuzzy PID, location portion controlSet range: percentage ...