1、 Preparation before testing: 1. Carefully read the People's Republic of China standard GB/3536 "Determination of Open Flash Point and Ignition Point of Petroleum Products (Cleveland Open Cup Method)", understand and familiarize yourself with the testing methods, procedures, and requirements outlined in the standard. 2. Prepare various testing instruments, materials, etc. for testing according to the requirements specified in GB/T3536 standard. 3. Check the working status of the instrument to ensure that it meets the working environment and conditions specified in the manual. 4. Check the casing of the instrument, which must be in a good grounding state, and the power cord should have a good grounding terminal.