65
•
The PERCEIVED TEMPERATURE → the HEAT INDEX → the WIND CHILL→ the DEW POINT are shown in a
loop in conjunction with the corresponding temperature.
1
‘FEELS LIKE’
• The perceived temperature index determines how people actually feel – subjectively – in the open air.
2
‘HEAT INDEX’
The heat index is determined on the basis of the temperature and air humidity data from the outdoor sensor, if the
temperature is between 27 °C and 50 °C.
Heat index
Warning
Meaning
27 °C to 32 °C
Caution
Possibility of heat exhaustion
33 °C to 40 °C
Extreme caution
Possibility of thermal dehydration
41 °C to 54 °C
Attention
Heat exhaustion likely
≥55 °C (≥130 °F)
Extreme danger
High risk of dehydration and heat stroke
3
‘WIND CHILL’
A combination of the temperature and wind speed data from the outdoor sensor determines the current wind chill
factor.
4
‘DEW POINT’
• The dew point is the temperature at which water vapour in the air condenses to liquid water at constant air pressure
at the same speed as it evaporates. The condensation water is referred to as dew when it forms on a solid surface.
• The dew point temperature is determined by the temperature and humidity data from the outdoor sensor.
d) Precipitation measurement
The ‘RAIN’ display area shows the precipitation information. The precipitation measurement units are adjustable.
1
Setting the unit for precipitation
1. Press and hold the Rain button (9) for 2 seconds to enter unit setting mode.
2. Press the Up button (16) or the Down button (15) to toggle between ‘mm’ and ‘in’ as the precipitation unit.
3. Press the Rain
button to confirm the setting and exit.
