User's Guide ______________________________________________________________________
126 _________________________________________________________________ M210455EN-B
Heated Ultrasonic Wind Sensor
WS425
Table 50
WS425 Specifications
Property
Description/Value
Sensor type
Ultrasonic 100 kHz
Fully compensated for temperature, humidity,
and altitude.
Measuring range
0 ... 56 m/s (0 ... 125 mph, 0 ... 107 knots)
0 … 130 m/s (survival)
Delay distance
Virtually zero
Starting threshold
Virtually zero
Response
characteristics
Maximum reading rate: 1 per second
Sonic measurement time: 0.2 second
Signal processing time: 0.15 second
Response time: 0.35 second
Accuracy (wind speed)
±
0.135 m/s (0.3 mph, 0.26 knots) or 3 % of
reading, whichever is greater
Accuracy (wind direction)
±
2 degrees
Resolution (wind speed)
0.1 m/s (0.1 mph, 0.1 knots, 0.1 km/h)
Resolution (wind direction) 1 degree
Power (operating)
10 ... 15 VDC, 12 mA (analog)
Power (heating)
36 VDC
±
10 %, 0.7 A
Heater
Thermostatically controlled heaters in the
transducer heads prevent freezing rain or
snow build up.
Output (analog wind
speed)
10 Hz/0.894 m/s (0 ... 625 Hz at 0 ... 55.88
m/s) (frequency)
10 mV/0.558 (0 ... 1.0 volt at 0 ... 55.88 m/s)
(voltage)
Output (analog wind
direction)
(0 to V
ref
at 0 to 359
°
) (simulated
potentiometer)
1.0 ... 4.0 VDC, for 5.0 VDC reference an
additional -2
°
error occurs for angles greater
than 291
°
(reference voltage)
Available averages
1 ... 9 seconds (RS-232)
Dead band (wind direction) None
Material
Stainless steel body and sensor arms
Silicone rubber and PVC transducer heads
Operating temperature
-50 ... +50
°
C (-58 ... -122
°
F)
Dimensions w
×
d
×
h
250
×
286
×
355 mm (9.8
×
11.2
×
13.9 in)
Weight
1.7 kg (3.7 lb)
Mean time between failure
(MTBF)
26 years calculated per the standard
assumptions of
MIL-HDBK-217, Revision E.
EMC compliance
EMC standard EN61326-1:1997 + Am1: 1998;
Generic Environment