CJ-3 type spontaneous combustion point tester is developed according to the industry standard DL/T706-1999 "Method for determination of spontaneous combustion point of anti-fuel oil for power plants", which is used to determine the temperature of spontaneous combustion point of anti-fuel oil in the speed control system of generating units over 30MW. The instrument adopts advanced AI artificial intelligence adjustment algorithm for temperature control, so that the internal temperature of the container reaches the thermal balance, the part, middle and bottom temperature of the flask is controlled within 1℃, and the use of the reflector to observe the burning point of the anti-fuel oil, the instrument has a beautiful appearance, convenient testing, stable and reliable performance. Main technical performance and indicators: (1) Applicable oil: the spontaneous combustion point of fuel oil and other special oils. (2) Conditions of use: 1, ambient temperature: room temperature ~ 50℃ 2, relative humidity: < 80% 3, power supply voltage: AC220V±10% 50Hz 4, high power < 2000W (3) Temperature measurement: 1, range: room temperature ~ 800℃ 2, accuracy: flask part, middle, bottom three points temperature difference ≤1℃