Enter the parameter menu by holding the key (typically for 10 seconds).
Ensure there is sufficient space around the unit for ventilation. If multiple units are mounted together, use a cooling fan to prevent internal temperature rise. Specifications Power Supply: 220 VAC ± 15%. Input Sensors: J, K, R, S thermocouples or RTD (selectable). Control Output: Relay (5 Amp) or SSR. For full technical diagrams, you can find the 452 PID-TIMER tt-91 manual 452 PID-TIMER tt-91 TT-70 NEW | PDF - Scribd thermotech tt91 manual hot
Separate signal lines from power lines to prevent inductive noise. Never connect anything to unused terminals. Enter the parameter menu by holding the key
To let the controller "learn" the best heating pattern, press and hold the UP key (or a dedicated TUNE button) for about 6 seconds. The "Tune" light will blink until the process is done. Specifications Power Supply: 220 VAC ± 15%