ASTM F649-1980(1999)
用比较法对空中游离微粒计数器进行的二次校正的标准实施规程

Standard Practice for Secondary Calibration of Airborne Particle Counter Using Comparison Procedures

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标准号

ASTM F649-1980(1999)

发布日期

1980年

实施日期

废止日期

无

中国标准分类号

A50

国际标准分类号

17.020 (Metrology and measurement in general)

发布单位

美国材料与试验协会

适用范围

1.1 This practice covers procedures for adjusting the size ranges of an airborne discrete particle counter (DPC) to match size/concentration data from a reference DPC that has been calibrated for counting and sizing accuracy in accordance with Practice F 328 and is kept in good working order. The practice is applied in situations where time, capabilities, or both, required for carrying out procedures in Practice F 328 are not available. It is particularly useful where more than one DPC may be required to observe an environment where the particulate material being counted and sized is different in composition from the precision spherical particulate materials used for calibration in Practice F 328 and/or all of the DPCs in use are not similar in optical or electronic design.

1.2 Procedures covered here include those to measure sampled and observed air volume or flow rate, zero count level, particle sizing and counting accuracy, particle sizing resolution, particle counting efficiency, and particle concentration limit.