Power Supply:DC 12V/ AC 110V-220V Temperature Control Range:-55-120 Resolution Ratio: 0.1C(-9.9-99.9); 1C(other range) Color of Displaying: red/blue Measurement accuracy: 0.1C Control accuracy: 0.1C Sensor: NTC10K Waterproof sensor Output: Relay Contact Capacity 20A 12V / 10A 220V Environmental requirements: -10-60C , humidity 20%-85%RH Dimension:79mm *43mm*26mm Cutting Size:73mm*39mm Sensor wire: 1 meter Function description: P0: refrigeration or heating mode P1: return difference setting P2: maximum temperature setting upper limit P3: minimum temperature setting lower limit P4: temperature correction P5: delay start time (unit: minute) Method of Use At this time, the display is displayed as measuring temperature. Press the SET key once and the display temperature flashes. Press +- to SET the required temperature (+- can quickly rise and fall) After the setting is complete, press Set to confirm and return. The output of the thermostat is 20A relay, which can meet various high-power loads. If the control circuit is well connected, it can supply power to the thermostat. At this time, the display screen displays the ambient temperature. Indicator and nixie tube status description Indicator: Blinking indicates delay in starting cooling or heating. Steady on indicates that the relay is closed Digital tube: display LL for the sensor open circuit, please connect the sensor according to the instructions; If HH is out of the measuring range, the thermostat will disconnect the relay forcibly. Display -- high temperature alarm Parameter Function Description Long press SET for 5 seconds to enter the main menu setting, press +- to switch to P0... P6, long press SET or 10 seconds no key action controller automatically confirm return. P0 cooling and heating mode Long press SET for 5 seconds to display P0, press SET once to SET the working mode, press +- to switch [H for heating mode] [C for cooling mode], press SET once to return, long press Set or 10 seconds without key action the controller will automatically confirm completion. Refrigeration mode: when the temperature measurement value is greater than or equal to the temperature setting point, the refrigeration relay draws, and the refrigerator starts; When the temperature measurement value is less than the temperature setting point-return difference, the refrigeration relay is disconnected and the refrigerator is closed. Heating mode: When the temperature measurement value is less than the temperature setting point, the heating relay draws and the heater starts; When the temperature measurement value is greater than or equal to the temperature setting point + return difference, the heating relay is disconnected and the heater is closed. P1 back error setting Press +- to switch to P1. Press SET once to SET the return difference value. Press +- to SET the return difference value to 0.1-15. Refrigeration mode: when the temperature measurement value is greater than or equal to the set value, the relay suction, the refrigerator starts; When the temperature measurement value is less than the set value - return value, the relay is disconnected and the cooler is closed. For example, when the environment is 30, the set value is 25, and the return difference is 2. After power on, the closed refrigerator of the relay starts. When the refrigeration reaches 23, the refrigerator of the relay will be disconnected and shut down. Heating mode: when the temperature measurement value set value, relay suction, heater start; When the temperature measurement value is not less than the set value + return value, the relay is disconnected and the heater is closed. For example, when the environment is 10, the set value is 25, and the return difference is 2. After power-up, the closed heater of the relay will start. When the heater is heated to 27, the relay will disconnect and the heater will close. P2 Set the upper limit for the maximum temperature In order to avoid the danger of oversetting the temperature due to misoperation by others, the thermostat has the maximum setting upper limit function, which limits the setting range of the maximum temperature setting point controlled by the thermostat. Press +- to switch to P2. Press SET once to SET the maximum limit. Press +- to SET the maximum temperature that can be SET. For example, if the temperature setting point is set to 60, the maximum temperature setting point can only be set to 60 C. To expand the temperature range, you need to adjust the upper limit first. P3 Setting the Lower limit for the lowest temperature In order to avoid the ice jam caused by the misoperation of others, the thermostat has the function of setting the minimum upper limit and lower limit, which limits the setting range of the setting point of the lowest temperature controlled by the thermostat. Press +- to switch to P3. Press SET once