Relative Humidity (Outside)

Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1%

Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 to 100% RH

Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±2%

Temperature Coefficient . . . . . . . . . . . . . . . . . . . . . . . . . 0.03% per °F (0.05% per °C), reference 68°F (20°C)

Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.5% per year

Rainfall

Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01" or 0.2 mm (user-selectable) (1 mm at totals ?3; 2000 mm)

Daily/Storm Rainfall Range . . . . . . . . . . . . . . . . . . . . . . . 0 to 99.99" (0 to 999.8 mm)

Monthly/Yearly/Total Rainfall Range. . . . . . . . . . . . . . . . . 0 to 199.99" (0 to 6553 mm)

Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . For rain rates up to 4"/hr (100 mm/hr): ±4% of total or ± one tip of the bucket (0.01"/0.2mm), whichever is greater.

Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 to 24 seconds

Rain Rate

Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01" or 0.1 mm (user-selectable) at typical rates (see Fig. 2 and 3)

Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0, 0.04"/hr (1 mm/hr) to 96"/hr (0 to 2438 mm/hr)

Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5% for rates less than 5" per hour (127 mm/hr)

Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 to 24 seconds

Solar Radiation

Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 W/m2

Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 1800 W/m2

Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5% of full scale (Reference: Eppley PSP at 1000 W/m2)

Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to ±2% per year

Cosine Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3% for angle of incidence from 0° to 75°

Temperature Coefficient . . . . . . . . . . . . . . . . . . . . . . . . . . -0.067% per °F (-0.12% per °C); reference temperature = 77°F (25 °C)

Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 seconds to 1 minute (5 minutes when dark)

Temperature (Outside)

Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1°F or 1°F or 0.1°C or 1°C nominal °C is converted from °F rounded to the nearest 1°C

Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to +150°F (-40° to +65°C)

Sensor Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.5°F (±0.3°C) See Fig. 1

Radiation Induced Error (Passive Shield) . . . . . . . . . . . . . +4°F (2°C) at solar noon (insolation = 1040 W/m2, avg. wind speed £ 2 mph (1 m/ s)) (reference: RM Young Model 43408 Fan-Aspirated Radiation Shield)

Radiation Induced Error (Fan-Aspirated Shield) . . . . . . . . +0.6°F (0.3°C) at solar noon (insolation = 1040 W/m2, avg. wind speed £ 2 mph (1 m/s)) (reference: RM Young Model 43408 Fan-Aspirated Radiation Shield) Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 to 12 seconds

Wind

Wind Direction

Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 - 360°

Display Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . 16 points (22.5°) on compass rose, 1° in numeric display

Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3°

Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 to 3 seconds

Wind Speed

Resolution and Units. . . . . . . . . . . . . . . . . . . . . . . . . 1 mph, 1 km/h, 0.4 m/s, or 1 knot (user-selectable). Measured in mph, other units are converted from mph and rounded to nearest 1 km/hr, 0.1 m/s, or 1 knot.

Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 to 200 mph, 1 to 173 knots, 0.5 to 89 m/s, 1 to 322 km/h

Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant Reading: 2.5 to 3 seconds, 10-minute Average: 1 minute

Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±2 mph (2 kts, 3 km/h, 1 m/s) or ±5%, whichever is greater

Maximum Cable Length . . . . . . . . . . . . . . . . . . . . . . 240’ (73 m) (See note on page 1)