General Tools and Instruments DAF4000 - Manual (Page 9)

5. Mode for measuring the current wind speed with the wind chill temperature DAF3010, DAF3300, DAF4000
Low temperatures present a danger to the human body and this danger is aggravated by the speed of the wind. The
Mini Airflow meters show immediately the temperature felt by the body and warns of risks of frostbite and
hypothermia.
WHICH MEANS : The wind chill factor is calculated on the basis of ambient temperature and wind speed. In the event
of wind, it gives an indication of the loss of heat by the body if the temperature is less than 10°C. This is the formula
which was adopted in January 2003 by the United States Federal Office for Meteorological Coordination with the
Meteorological Service of Canada (MSC), the US Department of Defence (DoD) and the United States National
Oceanic and Atmospheric Administration (NOAA).
Example: an ambient temperature of 0°C and a wind of 30 km/h act on your body as if the temperature were -7.8°C !
Choice of the unit of measurement for temperature :
See section 4, choice of the unit of measurement.
Display:
The display of the instant wind speed is made on the large digits and the wind chill temperature on the small digits with the indication .
Resolution (temperature) : to the tenth of a degree
Measuring cycle: 2 measurements per second
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