Output Parameters Explained; Table 5 Parameters Supported By Gmw90 Series - Vaisala CARBOCAP GMW90 Series User Manual

User's Guide _______________________________________________________________________

Output Parameters Explained

NOTE
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Table 5 Parameters Supported by GMW90 Series
Parameter Symbol
Carbon CO2
dioxide
Temperature T
Relative RH
humidity
Dewpoint Td
Dewpoint Tdf
Dewpoint dTd
depression
Wet bulb Tw
temperature
Absolute a
humidity
Mixing ratio x
Enthalpy h
All of these parameters are visible and selectable using the service port
(serial line and MI70 indicator use) even if your transmitter model does
not have a humidity sensor. However, the transmitter will not show any
measurement results for parameters that it cannot measure or calculate.
Unit(s) Description
ppm Concentration of carbon dioxide
gas (CO
°C Temperature in Celsius or
°F Fahrenheit scale.
% Ratio of the partial pressure of
water vapor in the air to the
saturation vapor pressure of air
at the current temperature.
°C Temperature at which the water
°F vapor in the air will condense into
water at the current pressure.
°C Same as Td, except when the
°F dewpoint is below 0 °C, the
transmitter outputs frostpoint (Tf)
instead of dewpoint.
°C Difference between ambient
°F temperature and dewpoint (Tdf).
°C The minimum temperature that
°F can be reached by evaporative
cooling in the current conditions.
g/m3 Quantity of water in a cubic meter
gr/ft3 (or cubic foot) of air.
g/kg Ratio of water vapor mass per
gr/lb kilogram (or pound) of dry air.
kJ/kg Sum of the internal energy of a
btu/lb thermodynamic system.
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