GB/T 6539-1997 specifies the method for determining the conductivity of aviation fuel and distillate fuel. The standard covers a variety of measurement methods and specifies the sample collection specifications to ensure that it is representative. In the measurement process, there are strict requirements for instrument selection, calibrating and operation procedures to accurately measure the conductivity of fuel under specific conditions. The data processing and result reporting rules are also clarified to ensure accurate and reliable results. This standard is of great significance for the quality control of aviation fuel and distillate fuel. It helps to evaluate their electrostatic characteristics and prevent safety hazards. It is widely used in fuel production, storage, transportation and aviation.