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68
Appendix D — Humidity Equations and Conversion
Appendix D — Humidity Equations and
Conversion Charts
Introduction
The equations and charts in this appendix are supplied for users
who are interested in more information about the relationships
between vapor pressure, humidity, temperature, and dew point.
Symbols used
e
= Vapor Pressure, millibars
e
i
= Vapor Pressure with respect to ice, millibars
e
w
= Vapor Pressure with respect to water, millibars
e
is
= Saturation vapor pressure, ice, millibars
e
ws
= Saturation vapor pressure, water, millibars
P
= Total Pressure, millibars
T
= Temperature, ºC
T
a
= Ambient temperature, ºC
T
d
= Dew point temperature, ºC
T
f
= Frost point temperature, ºC
Vapor pressure
Saturation vapor pressure with respect to water is a function of
temperature only and is given by the following:
ews
6.1121
17.502
T
240.97
T
+
-------------------------
exp
=
Содержание HumiLab
Страница 43: ...Chapter 5 Maintenance and Troubleshooting Page 39 Figure 13 Mirror Check and Mirror Sensor Balancing Procedure ...
Страница 75: ...Appendix D Humidity Equations and Conversion Charts Page 71 Figure 16 Graphical Conversion Chart ...
Страница 76: ...Page 72 Appendix D Humidity Equations and Conversion Figure 17 Psychrometric Chart ...
Страница 80: ...Page 76 Appendix E Warranty information and return ...