ASHRAE 41.6 : 2014

Foreword
1 Purpose
2 Scope
3 Definitions
4 Classifications
5 Requirements
6 Instruments and Calibration
7 Humidity Measurement Methods
8 Uncertainty Analysis
9 Test Report
10 Normative References
Informative Appendix A: Bibliography
Informative Appendix B: Example of an Uncertainty Estimate
                        for the Humidity Ratio Using an RH
                        Sensor, Dry-Bulb RTD, and Barometric
                        Sensor
Informative Appendix C: Example of an Uncertainty Estimate
                        for the Humidity Ratio Using a Wet-Bulb
                        RTD RH Sensor, Dry-Bulb RTD, and
                        Barometric Sensor
Informative Appendix D: Example of an Uncertainty Estimate for
                        the Humidity Ratio Using a Dew-Point
                        Sensor, Dry-Bulb RTD, and Barometric
                        Sensor

Describes methods for measuring the humidity of moist air with instruments.

This standard applies to the measurement of humidity of moist air from sea level to 3048 m (10,000 ft), within the drybulb temperature range of –50°C to 160°C (–58°F to 320°F),and within the dew-point temperature range of –50°C to 99°C (–58°F to 210°F). 2.2 This standard applies to methods for the direct measurement of wet-bulb temperature, dew-point temperature, relative humidity (RH), and humidity ratio. 2.3 This standard requires determining the uncertainty of direct humidity measurements due to various sources of errors