Davis Instruments Vantage Pro2 User Manual

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UV MEDs
MED (Minimum Erythemal Dose) is defined as the amount of sunlight exposure neces-
sary to induce a barely perceptible redness of the skin within 24 hours after sun expo-
sure. In other words, exposure to 1 MED will result in a reddening of the skin. Because
different skin types burn at different rates, 1 MED for persons with very dark skin is
different from 1 MED for persons with very light skin.
Both the U.S. Environmental Protection Agency (EPA) and Environment Canada have
developed skin type categories correlating characteristics of skin with rates of sunburn.
T
ABLE A-1: EPA SKIN PHOTOTYPES
Skin Phototype Skin Color Tanning & Sunburn history
1 - Never tans,
always burns
Pale or milky white;
alabaster
Develops red sunburn; painful swelling,
skin peels
2 - Sometimes tans,
usually burns
Very light brown;
sometimes freckles
Usually burns, pinkish or red coloring
appears; can gradually develop light
brown tan
3 - Usually tans,
sometimes burns
Light tan; brown, or
olive; distinctly
pigmented
Rarely burns; shows moderately rapid
tanning response
4 - Always tans;
rarely burns
Brown, dark brown, or
black
Rarely burns; shows very rapid tanning
response

Davis Instruments Vantage Pro2 Specifications

General

Update Interval	2.5 seconds
Wind Direction Resolution	1°
Wind Direction Range	0 to 360°
Rain Collector	Self-emptying tipping bucket
UV Index Range	0 to 16
Solar Radiation Range	0 to 1800 W/m²
Console Display	LCD with backlight
Wireless Transmission Range	1000 feet (300 meters) line of sight
Temperature Range	-40 to 150 °F (-40 to 65 °C)
Humidity Range	1 to 100%
Barometric Pressure Range	16.00 to 32.50 inHg (540 to 1100 hPa)
Wind Speed Range	0 to 200 mph (0 to 322 km/h)
Rain Collector Size	0.01 inch (0.2 mm) resolution
Rain Measurement Accuracy	±4% at rates up to 2 in/hr (50 mm/hr)
Power Supply	Solar-powered with battery backup
Console Power Supply	AC adapter or 3 C batteries