Power Supply: AC 100–240 V, 50/60 Hz Temperature Setting Range: –50 to +999 °C / °F Thermocouple Input: K, J, E, N types (user-selectable via front panel) Application: Heating or cooling control Display: Dual-line, 3-digit display; selectable between °C and °F Display Resolution: 1 °C / 1 °F Control Accuracy: ±0.5% FS Control Mode: PID or ON/OFF (ON/OFF mode activated when P = 0) Output: One control output, supporting either: – Relay output: 3 A @ 250 VAC (resistive load) – Voltage pulse output: 12 VDC (for external SSR) Alarm: One alarm with six modes — high deviation, low deviation, process value high, process value low, upper limit, lower limit Power Consumption: ≤10 VA Operating Environment: 0–50 °C, 30–85% RH, non-corrosive atmosphere Panel Indicators & Keys: PV: Process value / parameter symbols SV: Set value / parameter setting OUT: Output indicator AT: PID auto-tuning indicator AL1: Alarm indicator ▲: Up key ▼: Down key ◀: Shift key MODE: Parameter access and set-value confirmation Dimensions (L-type): 96 × 96 mm Panel Cutout Size (L-type): 92 × 92 mm Housing Material: Plastic Color: As shown Package Includes: 1 × Digital PID Temperature Controller 1 × English User Manual