Technical parameter Control range: -50-110C Input power: DC 12V Resolution: -9.9~99.9, 0.19C, other temperature range 1C Measurement input: NTC (10k 0.5%) waterproof sensor Temperature measurement accuracy: 0.1 C Output range: one 10A relay Control accuracy: 0.1 C Environmental requirements: -10~60C, humidity 20%-85% Backlash accuracy: 0.1 C Specification size: 48*40mm Refresh rate: 0.5s Power consumption of the whole machine Quiescent current: 3MA Pull-in current: 65MA High temperature protection: 0-110C Display type: 028 inch three-digit digital tube Instructions Connect the power supply and load to supply power to the controller. At this time, the display shows the measured temperature. Press the SET button once, and the temperature on the display flashes. Press +- to set the desired temperature. After the setting is completed, press SET to confirm and return. At this time, the controller automatically performs relay on and off according to the setting! The thermostat output is a 10A relay, which can meet various high-power loads. Please ensure that the wiring is correct. Status description of indicator light and digital tube Indicator light: Off means the relay is off, constant light means the relay is closed Digital tube: display L for sensor open circuit; display HH for exceeding the measuring range; thermostat will forcefully disconnect the relay: display --- high temperature protection Parameter function description Long press SET for 5 seconds to enter the main menu setting, press +-to switch PO...P8 long press SET or 10 seconds without key action, the controller automatically confirms and returns. W1209 Digital display itelligent temperature controller (function setting table) Code Code number Set range Factory setting PO Refrigeration / heating C/H C P1 Return difference setting 0.1-30 2 P2 Set temperature upper limit 110 C 110 P3 Set the lower limit of temperature -50 C -50 P4 Temperature calibration -7 C~7 C 0 P5 Delay start time 0-600s 0 P6 High temperature alarm 0-110 C OFF P7 Restore factory default C/H C Boot in the state long press + - boot can restore the factory settings