Chapter 6 ____________________________________________________________ Technical Data
VAISALA ______________________________________________________________________ 147
Present Weather Detector PWD11A
Table 27
PWD11A Present Weather Detector Specifications
Property
Description/Value
Measurement range of
MOR
10 ... 20 000 m (32 ... 65 600 feet)
Accuracy
±
10 %, range 10 ... 10 000 m (<32800 ft)
±
15 %, range 10 ... 20 km (32800 ... 65600 ft)
Maximum power
consumption
15 W without heating,
max 20 W 10 ... 50 VDC
Time constant
60 seconds
Update interval
15 seconds
Precipitation detection
sensitivity
0.05 mm/h or less, within 10 minutes
Weather type identification 7 different types of precipitation (rain, freezing
rain, drizzle, freezing drizzle, mixed rain/snow,
snow, ice pellets)
Precipitation (unknown type)
Fog (mist), haze (smoke, sand) or clear
WMO code table 4680
Weather type reporting
Code letters for precipitation, NWS (National
Weather Service, USA)
Range 0.00 ... 999 mm/h
Precipitation intensity
measurement
Accuracy
±
30 % (range 0.5 ... 20 mm/h, liquid
precipitation)
Sun orientation
Sunlight into the light receiver must be
avoided
Material
Anodized aluminum, black
Wind speed
Up to 60 m/s (116 knots)
Operating temperature
range
-40 ... +55
°
C (-40 ... 131
°
F)
Operating humidity range
Up to 100 %RH
Dimensions w
×
d
×
h
720
×
320
×
220 mm (28.3
×
12.6
×
8.66 in)
Weight
2.8 kg (6.17 lb.)