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。

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.

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不间断的校准或比较链，可以通过不同的、能证明溯源性的实验室以过若干步骤来实现。

NOTE 8 The unbroken chain of calibrations or comparisons may be achieved in several steps carried out by different laboratories that can demonstrate traceability.

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