... auto-tuning 3. 0.2%FS 4. Output Relay, SSR, mA ,SCR 5. temperature control meter AI-708P PROGRAMMABLE ... SCR for single-phase or 3-phase, zero position controlSCR phase trigger signals: direct trigger SCR for single-phase or 3-phase controlControlControl mode: PID ... , ON/OFF, Phase PID, continuous PID, self-regulated ...