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1. Before using the petroleum flash point and ignition point tester, read the instruction manual carefully. 2. Based on the test subjects, carefully read GB/T 3536 \"Methods for determining flash point and ignition point of petroleum products\" in order to understand and become familiar with the test methods, test procedures, and requirements specified in the standard. 3. In accordance with the requirements specified in the standards, the petroleum flash point and ignition point tester should be placed in a dark and wind-protected area to facilitate the observation of flaring; meanwhile, all the necessary testing equipment and materials for the experiment must be prepared. 4. Check the operating condition of the petroleum flash point and ignition point tester to ensure it meets the operating environment and conditions specified in the manual. 5. Check that the enclosure of this instrument is in good electrical grounding condition. 6. Open the packaging box and, in accordance with the accompanying documents and technical specifications for the petroleum flash point and ignition point tester, inspect the exterior of the instrument as well as its related components. If there are no damages or missing parts, install the instrument as shown in the schematic diagram. 7. Turn on the power switch; the indicator light will turn on, after which the testing can be carried out. 8. Pour the sample into the Cleveland oil cup up to the mark. 9. Place the oil cup on the electric stove, adjust the heights of the ignition device and the thermometer, set the size of the flame, and adjust the potentiometer in accordance with the standard specifications to control the heating rate; thereafter, the ignition test can be carried out. 10. At 28°C before the expected flash point, press the sweep button to trigger the ignition rod to sweep and ignite. If no flash point is observed, after each increase of 2°C in temperature, press the sweep button again to cause the ignition rod to sweep in the opposite direction to ignite. The time required for the test flame to cross the test cup each time is approximately 1 s. 11. When a flash occurs at any point on the oil surface, the temperature indicated on the thermometer is recorded as the flash point. 12. After the test is completed, clean up thoroughly and turn off the power supply.