Particle counters are very important for detecting the size and quantity of particles of various sizes, and are widely used in scientific research and other fields. Therefore, the accuracy and stability of particle counter counting are particularly important. In order to ensure that the particle counter transmits true and reliable information, a series of calibration work must be carried out on it. Therefore, the accuracy of particle counter calibration directly affects the measurement of solid pollution level. This article discusses the factors affecting the accuracy of particle counter calibration and their solutions.

For all particle counters, the electrical and optical parameters of automatic particle counters are constantly changing due to drift, aging, displacement and wear of optical components in electronic circuits. Before performing the calibration of the particle counter, it is important to ensure that the instrument is functioning properly, whether there have been any malfunctions since the last calibration, whether it has been returned to the factory for repair, and whether the sensor has been replaced. These issues may affect the result deviation during the calibration process.

The sampling volume refers to the actual volume of particles counted by a particle counter each time, which directly affects the particle counting results. Therefore, the accuracy of the sampling volume has a significant impact on the final test results of the particle counter. The vast majority of solid particle pollution levels are classified based on the number of particles per 100mL of liquid. When calibrating a particle counter, if the sampling volume is inaccurate, it will increase the calibration error, resulting in significant deviation in the results when measuring the solid pollution level of oil.