Feature:  Product Name: High precision microcomputer temperature controller.  Temperature range: -50~110°C.  Resolution: 0.1 ° C.  Temperature control range: -50~110°C.  Temperature control accuracy: 1 ° C.  Temperature probe: NTC10K (B3950) L=1M.  Supply voltage: DC12V/DC24V/AC220V.  Applicable environment: -25~55°C Humidity 50%-85%.  Output type: 10A relay output.  Appearance size: diameter 80mm.  Opening size: diameter 61mm/3mm.     How to use:  1. Connect the power supply and load according to the instructions. Please do not overpressure and overload.  2. Setting mode, long press SET button for 5 seconds will display P0. Press SET button shortly to set H to heating mode and C to cooling mode (up and down button to switch).  3. Set the stop temperature, press the SET button once to flash the screen, and then press the up and down keys to set the desired stop temperature.  4. Press and hold the SET button for 5 seconds to display P0, press the up and down keys to switch to P1, then press the SET button to set the difference back (press the up and down keys to adjust). If the heating mode H needs to control the temperature between 36-38 degrees , then the stop temperature is set to 38 degrees and the back difference is set to 2 (the highest temperature minus the lowest temperature).  5. Indicator light. SET light is on to indicate that the parameter is being set; OUT indicator is flashing to indicate the start delay, and always on to indicate the output.     Setting function description:  Press SET button for 5 seconds to enter internal parameter setting, up and down button to switch P0-P7.  P0: Heating and cooling mode H/C:  The low temperature start is the heating mode, set to H. For example: the actual temperature is 21 ° C, the temperature needs to be controlled between 36-38 ° C, we set P0 to H heating mode.  The high temperature start is the cooling mode, set to C. For example: the actual temperature is 38 °C, and the temperature needs to be controlled between 24-26 °C. We set P0 to C cooling mode.  P1: Hysteresis setting:  In heating mode (H): The measured value starts the output heating to the set value when the set value - hysteresis.  For example, to control an indoor temperature between 36 and 38 ° C, the actual temperature is 20 ° C, heating equipment is required to heat room, P0 is set to H, the stop temperature is set to 38 degrees, and P1 is set to 2. (High temperature - low temperature = hysteresis, 38-36 = 2) In cooling mode (C): When the measured value >= set value + hysteresis, the output cooling is started until the set value stops. For example, to control an indoor temperature between 24 and 26 ° C, the actual temperature is 36 ° C, the cooling equipment is required to cool room, P0 is set to C, the stop temperature is set to 24 degrees, and P1 is set to 2. (High temperature - low temperature = hysteresis, 26-24 = 2) P2: Limit the maximum set value (non-temperature control setting): up to 110 °C:  For example, if P2 is set to 50 °C, then when you set the operation, the maximum temperature can only be set to 50 °C.  P3: Limit the min. set value (non-temperature control setting): min. -50 °C:  For example, if P2 is set to 20 °C, then when you set the operation, the set min. temperature can only be 20 °C.