This Standard describes methods for determining air velocity and flow direction, carbon monoxide (CO), nitric oxide (NO) and nitrogen dioxide (NO2) concentrations and visibility in road tunnels using direct-reading instruments. This Standard applies to the measurement of air quality and air velocity inside road tunnels.
Table of contents
Header
About this publication
Preface
Foreword
1 Scope
2 Referenced documents
3 Definitions
4 Test parameter—air velocity
4.1 Scope
4.2 Principle
4.3 Apparatus
4.3.1 Instrument
4.3.2 Reference path length measurement device
4.3.3 Transfer standard flow sensor
4.4 Procedure
4.5 Instrument checks and calibrations
4.5.1 General
4.5.2 Measurement path length
4.5.3 Initial check
4.5.4 Zero check
4.5.5 System component check
4.5.6 Operational precision check
4.6 Maintenance
4.6.1 General
4.6.2 On site checks
4.7 Calculation and expression of results
4.8 Measurement uncertainty
5 Test parameters—carbon monoxide, nitric oxide and nitrogen dioxide
5.1 Scope
5.2 Principle
5.3 Apparatus
5.3.1 Instrument
5.3.2 Reference barometer
5.3.3 Reference thermometer
5.3.4 Reference path length measurement device
5.3.5 Reference flow through calibration cell length measurement device
5.4 Procedure
5.5 Instrument checks and calibrations
5.5.1 General
5.5.2 Open path instruments
5.5.3 Single point instruments
5.5.4 Measurement path length
5.5.5 Flow through calibration cell length
5.5.6 Temperature and pressure checks
5.5.7 Zero air
5.5.8 Reference test atmosphere
5.5.9 Zero check
5.5.9.1 Open path instruments
5.5.9.2 Single point instruments
5.5.10 Zero calibration
5.5.11 Span check
5.5.11.1 Open path instruments
5.5.11.2 Single point instruments
5.5.12 Span calibration
5.5.13 Multipoint precision check
5.5.14 System component check
5.6 Maintenance
5.6.1 General
5.6.2 Window clean
5.6.3 Lamp change
5.6.4 Optical alignment
5.7 Calculation and expression of results
5.8 Measurement uncertainty
6 Testing parameter—visibility
6.1 Scope
6.2 Principle
6.3 Apparatus
6.3.1 Instrument
6.3.2 Reference path length measurement device
6.4 Procedure
6.5 Instrument checks and calibrations
6.5.1 General
6.5.2 Measurement path length
6.5.3 Zero check
6.5.4 Span check
6.5.5 Zero and span calibration
6.5.6 Multipoint precision check
6.5.7 System component check
6.6 Maintenance
6.6.1 General
6.6.2 Window clean
6.6.3 Lamp change
6.6.4 Optical alignment
6.7 Calculation and expression of results
6.8 Measurement uncertainty
7 Quality assurance and control
7.1 General
7.2 Instrument log
7.3 Data acquisition and transfer
7.4 Data validation
8 Test report
Cited references in this standard
Content history
DR AS/NZS 3580.18:2016
Please select a variation to view its description.
