There should be traceability to standards (e. g. national, regional or international standards) used in the calibration.
应当有可追溯的校准标准(如国家标准、地区标准或国际标准等)。
2
Traceability of airborne particle counter has its own specialty, there is a big difficulty, at home and abroad many people are working to the calibration of airborne particle counter for many years.
尘埃粒子计数器的量值溯源因其特殊性，存在很大难度，多年来国内外都在致力于尘埃粒子计数器的校准研究。
3
Then, according to calibration requirements of automatic test systems, the traceability design was presented.