Schneider Electric / Eurotherm 808/R1/R1/NO/NO/QLS/(AJHF130) Digital Controller

The Schneider Electric Eurotherm 808/R1/R1/NO/NO/QLS/(AJHF130) is a 1/8 DIN digital PID controller engineered for precision temperature and process control across plastics, heat treatment, and medical applications. It delivers advanced closed-loop regulation with configurable overshoot inhibition and selectable cooling algorithms, serving ovens, furnaces, incubators, and sterilizers. The instrument combines dual LED displays for simultaneous Process Variable and Setpoint indication with a user-configurable front panel interface featuring 4-button operation and parameter-hiding security.

Technical Specifications

• Format: 1/8 DIN


• Model: 808/R1/R1/NO/NO/QLS/(AJHF130)


• Control Type: Digital PID with EM-1 algorithm and variable overshoot inhibition


• Displays: Dual LED; Process Variable and Setpoint simultaneous indication


• Input Configuration: J Thermocouple (32–800°F); configurable for Type J, K, L, R, S, T, Platinel II thermocouples; 3-wire RTD; linear process input with 2-point flexible scaling


• Display Range: −999 to 9999 in process units (full-scale configurable)


• Input Resolution: 0.67 µV


• Input Scan Rate: 8 times per second


• Calibration Accuracy: 0.25% and 0.15%


• CJC Rejection: 20:1


• Output 1: Relay (R1); 264 V, 2 A maximum (resistive load, contact suppression)


• Output 2: Relay (R1); configurable as cooling or alarm channel; 264 V, 2 A maximum (alarm channel cannot be triac)


• Alarms: Configurable full-scale low, full-scale high, or deviation band alarm


• Digital Communications: Optional EIA-232-D or EIA-422-A for computer supervision and control


• Self-Tuning: Integral automatic PID parameter determination from ambient or setpoint


• Setpoint Programming: Ramp-to-setpoint; optional four-segment ramp-dwell-ramp-dwell profiling with up to 200 program cycles or continuous operation


• Cooling Algorithms: Four selectable types


• Operating Modes: Automatic (closed loop) and Manual via A/M button

Key Features

• Linear process input with fully flexible, non-interactive 2-point scaling


• Self-tune facility automatically determines PID parameters


• Ramp-to-setpoint and optional setpoint profiling for repeatable process execution


• User-selectable parameter hiding for operator interface configuration

Typical Applications Plastics processing, heat treatment, medical device sterilization, laboratory incubation.

Compatibility & Integration Optional EIA-232-D and EIA-422-A serial interfaces enable integration with supervisory control systems and computer-based monitoring.