Vaisala WXT520 - Manual (Page 143)

Chapter 11 ____________________________________________________ Technical Specifications
VAISALA______________________________________________________________________ 141
Table 15 Relative Humidity
Property Description/Value
Range 0 ... 100 %RH
Accuracy ±3 %RH at 0 ... 90 %RH
±5 %RH at 90 ... 100 %RH
Output resolution 0.1 %RH
PTU Measuring interval 1 ... 3600 s (= 60 min), at one second steps
Table 16 Precipitation
Property Description/Value
Rainfall cumulative accumulation after the latest
auto or manual reset
collecting area
60 cm
2
output resolution 0.01 mm (0.001 in)
field accuracy for daily
accumulation
better than 5 %
1
, weather dependent
units available mm, in
Rain duration counting each 10-second increment
whenever droplet detected
output resolution 10 s
Rain intensity running one minute average in 10-second
steps
range 0 ... 200 mm/h (broader range with reduced
accuracy)
units available mm/h, in/h
Hail cumulative amount of hits against collecting
surface
output resolution
0.1 hit/cm
2
, 1 hit/in
2
, 1 hit
units available
hits/cm 2 , hits/in 2 , hits
Hail duration counting each 10-second increment
whenever hailstone detected
output resolution 10 s
Hail intensity one-minute running average in 10-second
steps
output resolution
0.1 hit/cm
2
h, 1 hit/in
2
h, 1 hit/h
units available
hits/cm
2
h, hits/in
2
h, hits/h
1. Due to the nature of the phenomenon, deviations caused by spatial
variations may exist in precipitation readings, especially in short time
scale. The accuracy specification does not include possible wind induced
error.