JJF 1659-2017Calibration Specification for PM2.5 Mass Concentration Measurement Instruments (English PDF)

5.1 Flow indication error (2)

5.2 Average flow deviation (2)

5.3 Traffic Repeatability (2)

5.4 Flow Stability (2)

5.5 Timing error indication (2)

5.6 Temperature indication error (2)

5.7 Atmospheric pressure indication error (2)

5.8 Zero drift (2)

5.9 Concentration indication error (2)

6.1 Calibration of environmental conditions (2)

6.2 Instrument Requirements (2)

6.3 Measurement standards and other equipment (2)

7.1 Preparation before calibration (3)

7.2 Flow indication error (3)

7.3 Average flow deviation (3)

7.4 Traffic Repeatability (3)

7.5 Flow Stability (4)

7.6 Timing indication error (4)

7.7 Temperature indication error (4)

7.8 Atmospheric pressure indication error (5)

7.9 Zero drift (5)

7.10 Concentration indication error (5)

16.67 L/min, calibration range of PM2.5 measuring instrument (10 ~ 1000) µg/m3. other

Principle, flow and measuring range of mass concentration measuring instrument can be calibrated with reference to this specification.

2 reference documents this specification cites the following documents.

Atmospheric aerosol observation terminology GB/T 31159-2014 HJ93-2013 Ambient Air Particulate Matter (PM10 and PM2.5) Sampler Technical Requirements and Test Methods HJ653-2013 Environmental Air Particles (PM10 and PM2.5) Continuous Automatic Monitoring System Technical Requirements and Inspection Test method for dated references, only the dated version applies to this specification; for undated references the latest version of this specification applies to this specification.

3 Terms and measurement units

3.1 Aerodynamic diameter the particles have the same movement speed, the density of 1g/cm3 spherical particles diameter.

3.2 Fine Particle (PM2.5) Aerosol particles with aerodynamic diameters less than or equal to 2.5 µm.

3.3 cutter particleseparatedevice Refers to the separation of particles with different particle size device.

3.4 Working point flowrateraterate Under working conditions, the sample flow remains constant and the flow of cutting characteristics is guaranteed.

4 Overview

PM2.5 mass concentration meter (hereinafter referred to as instrument) is used to measure the ambient air aerodynamic diameter is not an instrument with a mass concentration of particles larger than 2.5 µm. According to the different principle of measuring instruments, divided into filter weighing method, Oscillating balance method, beta-ray absorption method. Instrument generally by the sample acquisition unit (including the sampling port, PM2.5 cutter and Sampling tube, etc.), sample measurement unit, data processing unit and display unit. Its working principle is. Instruments to constant Constant flow extraction of ambient air samples, the sample collection unit will be cut and separated particles sent to the sample measurement sheet Yuan, the sample measurement unit for PM2.5 particulate matter measurement, the data processing unit will measure the results of the analyzer Count, the final output by the display unit measurement results. Instrument structure diagram shown in Figure 1.