WeatherHawk SM-28 Skymaster Wind/Weather Meter - Manual (Page 4)

Temperature
Relative Humidity
Barometric Pressure
General Temperature:
Displays the temperature in Fahrenheit or Celsius.
Heat Index:
Displays the measure of how humidity acts along with
high temperatures to reduce the body's ability to cool
itself. In most cases, the heat index will be lower than
the temperature.
Dew point:
Displays the temperature at which air becomes
saturated with moisture (the temperature at which fog
will form).
General Relative Humidity:
Displays the current relative humidity. Relative
humidity is the amount of water vapor measured in
the air, divided by the potential amount of vapor
that the air can hold – at that temperature. The
relative humidity comes factory calibrated.
However, the Skymaster can be calibrated manually
for more demanding field requirements. To calibrate
the relative humidity, see the Humidity Calibration
section.
Unit of Measure:
The Skymaster can display barometric pressure in
inches of mercury (inHg) or in millibars / hectopascals
(hpa mb).
Barometer Indicator:
BAR - Indicates the unit is barometer mode.
Pressure History Bar Graph:
Displays barometric pressure history for the past 16
hours. Note: The unit must be on for 16 hours before
the complete graph is displayed. For more
information, please see section titled Bar Graph.