DAVIS Vantage Pro2 User Manual

Weather Data Measured & Calculated
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T. B. Fitzpatrick of the Harvard Medical School developed a categorization of
skin types 1 through 6 which were adopted by Environment Canada. These
skin types are detailed in Table 3b below.
Note: More about the Fitzpatrick Skin Types is available in: Fitzpatrick TB. Editorial: the
validity and practicality of sun-reactive skin types I through VI. Arch Dermatol 1988;
124:869-871
UV Dose and Sunburn - Use this plot to estimate the MED dose leading to
sunburn. A person with Type II (Environment Canada) skin type might choose
0.75 MED as the maximum for the day; in contrast, a person with Type V
(Environment Canada) Skin Type might consider 2.5 MEDs a reasonable dose
for the day. NOTE: the Weather Envoy assumes a Fitzpatrick (Environment
Canada) Skin Type of II.
4 - Always tans;
rarely burns
Brown, dark brown, or
black
Rarely burns; shows very rapid tanning
response
Table A2: Environment Canada Skin Types and Reaction to the Sun
Skin
Type
Skin Color History of Tanning & Sunburning
I White Always burns easily, never tans
II White Always burns easily, tans minimally
III Light Brown Burns moderately, tans gradually
IV
Moderate
Brown
Burns minimally, tans well
V Dark Brown Burns rarely, tans profusely
VI Black Never burns, deep pigmentation
Table A1: EPA Skin Phototypes
Skin Phototype Skin color Tanning & Sunburn history

DAVIS Vantage Pro2 Specifications

General

Update Interval	2.5 seconds
Temperature Accuracy	±1°F (±0.5°C)
Barometric Pressure Range	16.00 to 32.50 inHg (540 to 1100 hPa)
Rain Collector Type	Tipping bucket
Wind Speed Range	0 to 200 mph (0 to 322 km/h)
Wind Speed Accuracy	±2 mph (±3 km/h) or ±5%, whichever is greater
Wind Direction Resolution	1°
Wind Direction Accuracy	±3°
Solar Radiation Range	0 to 1800 W/m²
Solar Radiation Sensor Accuracy	±5%
UV Index Range	0 to 16
UV Index Accuracy	±5%
Wireless Transmission Range	Up to 1000 ft (300 m)
Temperature Range	-40°F to +150°F (-40°C to +65°C)
Humidity Range	0 to 100%
Humidity Accuracy	±3%
Rain Collector Resolution	0.01 in (0.2 mm)
Rain Measurement Accuracy	±4%
Wind Direction Range	0 to 360°
Power Supply	Solar powered with battery backup