Vaisala WS425 - Manual (Page 79)

Chapter 7 ____________________________________________________________ Technical Data
VAISALA _______________________________________________________________________ 79
CHAPTER 7
TECHNICAL DATA
This chapter gives the technical data on the product.
Specifications
Table 16 Technical Specifications
Wind Speed
Measurement range
serial
output
analog output
0 ... 65 m/s (0 ... 144 mph, 0 ... 125 knots)
0 ... 56 m/s (0 ... 124 mph, 0 ... 107 knots)
Starting threshold virtually zero
Delay distance virtually zero
Resolution 0.1 m/s (0.1 mph, 0.1 knots, 0.1 km/h)
Accuracy (range 0 ... 65 m/s)
±0.135 m/s (0.3 mph, 0.26 knots) or 3 % of reading,
whichever is greater
Wind Direction
Measurement range
0 ... 360°
Starting threshold virtually zero
Delay distance virtually zero
Resolution 1°
Accuracy (wind speed over 1 m/s)
±2°
Outputs
Digital outputs
type RS-232, RS422 or RS485, four different message
formats
bit rate adjustable from 1200 to 19200 bit/s
available averages RS-232: 1 to 9 seconds
SDI12- Standard Data Interface
type 3 wires for ground, signal and supply
bit rate fixed 1200 bit/s
available averages 1 to 3600 seconds
Analog outputs
wind speed
frequency 5 Hz/mph
voltage 8.0 mV/mph
output impedance 10 kohm
wind direction
simulated potentiometer 0 ...V
ref
represents 0 ... 359°
reference voltage 1.0 ... 4.0 V
output impedance 24 kohm