21
This segment displays calculated values related to temperature and
pressure. The values that can be displayed are
“
wind chill
”
,
“
heat
index
”
and
“
dew point.
”
by press SET key.
Wind chill and heat index are perceptual values that indicate the air
temperature as experienced by humans, as opposed to the measured
ambient air temperature. The passing flow of lower temperature air
makes it feel
“
colder
”
and this is reflected in the wind chill temperature.
Conversely, if it feels warmer than the measured air temperature due to
the effects of humidity, we use a heat-index temperature to indicate how
warm it feels.
The
“
dew point
”
is not a perceptual value, but it is calculated from the
sensor values (temperature and humidity). The dew point is the
temperature to which air has to be cooled to become saturated and
beyond which airborne water vapor would become liquid (dew).
If the arrow symbol
“
”
is in this segment, following information with
time stamp will appear on message panel:
1) Min wind chill temperature of the current day
2) Min wind chill temperature since last reset
3) Max dew point temperature of the current day
4) Min dew point temperature of the current day
5) Max dew point temperature since last reset
6) Min dew point temperature since last reset
7) Max heat index of the day of the current day.
8) Max heat index of the day since last reset
1.8 Rainfall
