AS/NZS 3580.9.12:2022 sets out the method for the determination of suspended particulate matter in ambient air using a beta attenuation monitor (BAM). The method can provide a measure of the time-integrated mean particle concentrations for periods ranging from 10 min to 24 h.
Table of contents
Header
About this publication
Preface
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
4.1 Principle of measurement
4.2 Limitations and interferences
5 Apparatus
5.1 General
5.2 Types of beta attenuation monitors
5.2.1 General
5.2.2 Step-wise
5.2.3 Continuous
5.3 PM10 size selective inlet
5.4 PM2.5 particle size separator
5.5 Heated air inlet system
5.6 Measurement system
5.6.1 General
5.6.2 Filter system
5.6.3 Beta particle measurement system
5.6.4 Flow control system
5.6.5 Internal computer and data logger
5.7 Vacuum pump
5.8 Calibration equipment
5.8.1 Mass calibration foil kit
5.8.2 Reference flow meter
5.8.3 Reference thermometer
5.8.4 Reference barometer
5.8.5 Reference relative humidity device
5.8.6 Zero noise check particle filter
5.9 Instrument performance
6 Sampling
6.1 Location
6.2 Sampling environment
6.2.1 General
6.2.2 Heated air inlet system
7 Procedure
7.1 Instrument operation
7.2 Calibration
7.2.1 General
7.2.2 Particle mass checks and calibration
7.2.2.1 Particle mass — Factory calibration
7.2.2.2 Particle mass precision check
7.2.2.3 Particle mass calibration
7.2.2.4 Mass membrane/mass calibration foil kit check
7.2.3 Leak check
7.2.4 Temperature sensor check and calibration
7.2.5 Pressure transducer check and calibration
7.2.6 Flow rate check and calibration
7.2.7 Relative humidity sensor check and calibration
7.2.8 Zero noise check
7.3 Instrument maintenance
7.3.1 General
7.3.2 PM10 size selective inlet and PM2.5 particle size separator
