Vaisala WAA151 - Manual (Page 27)

Chapter 6 _______________________________________________Technical Data
VAISALA__________________________________________________________25
CHAPTER 6
TECHNICAL DATA
This chapter provides the technical data of the WAA151
Anemometer.
Specifications
Table 5 WAA151 Anemometer Specifications
Property Description/Value
Sensor/Transducer type Cup anemometer/Opto-chopper
Measuring range
0.4 ... 75 m/s
Starting threshold < 0.5 m/s 1)
Distance constant 2.0 m
Transducer output
0 ... 75 m/s
Characteristic Transfer
Function
0 ... 750 Hz square wave
U
f
= 0.1007
× R + 0.3278
(U
f
= wind speed; R = o/p pulse rate)
Accuracy (within 0.4 ...
60 m/s)
With Characteristic
Transfer Function
With "simple transfer
function" U
f
= 0.1
× R
± 0.17 m/s
2)
± 0.5 m/s
Transducer output level
(I
out
< +5 mA)
(I
out
> -5 mA)
High state > U
in
-1.5 V
Low state < 2.0 V
Settling time after
power turn-on < 30 µs
Operating power supply 9.5 ... 15.5 VDC, 20 mA typical
Heating power supply
20 VDC or VAC, 500 mA typical
Electrical connections MIL-C-26482 type; 6-wire cable