JJG 520-2005 粉尘采样器

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中华人民共和国国家计量检定规程

JJG520-2005

粉尘采样器

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国家质量监督检验检疫总局发布

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本规程经国家质量监督检验检疫总局于2005年4月28日批准，并自

2005年10月28日起实施。

归口单位:全国环境化学计量技术委员会

主要起草单位:国家矿山安全计量站

上海计量测试技术研究院

参加起草单位:国家标准物质研究中心

本规程委托全国环境化学计量技术委员会负责解释

JJG520-2005

本规程主要起草人:

陈福民(国家矿山安全计量站)

金小汉(国家矿山安全计量站)

文」悦(上海计量测试技术研究院)

参加起草人:

张文阁(国家标准物质研究中心)

付建涛(国家矿山安全计量站)

JJG520-2005

目录

1范围···················。········································。·····························……(1)

2术语························································································…·…(1)

2.1粉尘采样器··············································································……(1)

2.2呼吸性粉尘采样器··································································……(1)

2.3飘尘采样器···············································，·····························……(1)

2.4连续粉尘采样器·，······································································……(1)

2.5短时粉尘采样器·······································································……(1)

2.6负载能力·················································································……(1)

2.7采样流量·················································································……(1)

3概述·······························································……(1)

4计量性能要求·············································································……(2)

4.1采样流量误差············································································一(2)

4.2采样流量稳定性········································································……(2)

4.3采样时间误差···········································································……(2)

4.4采样体积误差···········································································……(2)

5通用技术要求··············································································……(2)

5.1外观及标志··············································································……(2)

5.2负载能力·················································································……(2)

5.3气密性····················································································……(2)

5.4绝缘电阻·················································································……(2)

5.5绝缘强度·················································································……(2)

6计量器具控制····························。·················································……(3)

6.1检定条件·················································································……(3)

6.2检定项目········································································，········……(3)

6.3检定方法·················································································……(3)

6.4检定结果处理···········································································……(8)

6.5检定周期·················································································……(8)

附录A粉尘采样器检定装置的技术要求·············································……(9)

附录B检定证书(内页)格式························································…·…(10)

附录C检定结果通知书(内页)格式················································……(11)

附录D检定原始记录格式·······························································……(12)

JJG520-2005

粉尘采样器检定规程

范围

本规程适用于粉尘采样器(含飘尘采样器)的首次检定、后续检定及使用中检验。

2术语

2.1粉尘采样器

用于定量采集悬浮在空气中固体颗粒的仪器。

2.2呼吸性粉尘采样器

具有前级分离器，能够定量采集悬浮于空气中并可进人人体呼吸系统的细微固体颗

粒的仪器。

2.3飘尘采样器

用于定量采集悬浮在大气中的粒径小于10tm的固体颗粒的仪器。

2.4连续粉尘采样器

在一个工作班或更长时间内连续采集空气中粉尘的仪器。

2.5短时粉尘采样器

定点、定时采集空气中粉尘的仪器，通常单个样品的采集时间在1h以内。

2.6负载能力

在规定的采样流量下，采样器克服气路、滤膜和粉尘的阻力大小。

2.7采样流量

采样时，单位时间内通过粉尘采样器采样口的空气体积。

3概述

我国目前测量空气中粉尘质量浓度的方法主要是计重法，其原理是用粉尘采样器抽

取一定体积的含尘空气，粉尘被捕集在质量已知的滤膜上，然后在实验室称量出含尘滤

膜的质量，并根据公式(1)计算出粉尘的质量浓度:

P=卫12-m'x1000(1)

式中:P—粉尘质量浓度，mg/m';

m,滤膜采集粉尘前的质量，mg;

M2滤膜采集粉尘后的质量，mg;

4—采样流量，Umin;

t—采样时间，mina

粉尘采样器主要由采样头、抽气泵、流量计、电源等部分组成。某些采样器还具有

采样时间显示、采样体积显示装置。

粉尘采样器按其工作时间分为短时和连续粉尘采样器;按其采尘粒径范围可分为总

l

JJG520-2005

粉尘和呼吸性粉尘采样器。

呼吸性粉尘采样器前级预捕集器主要有水平淘析器、惯性冲击器、旋风分离器和向

心分离器等类型。

飘尘采样器与粉尘采样器所不同的是其采样头带有10lm的切割器，对大于10tun

的尘粒进行分离，小于10Inn的尘粒随着气流经切割器出口被捕集在已知质量的滤膜

上。

4计量性能要求

4.1采样流量误差

呼吸性粉尘采样器(含飘尘采样器)的采样流