Head Office:
VAISALA Oy
PL 26, FIN-00421 Helsinki
FINLAND
Phone (int.): (+358 0) 894 91
Telefax:
(+358 0) 894 9227
Telex:
122832 vsala fi
I S O 9 0 0 1
C E R T I F I E D
Q U A L I T Y
S Y S T E M
TECHNICAL DATA
Sensor/Transducer type
Optical code disc
Measuring range
0 ... 360°
Starting threshold
< 0.4 m/s
Resolution
5.6°
Damping Ratio
0.14
Overshoot Ratio
0.65
Delay Distance
0.4 m
Accuracy
better than ± 3°
Input power supply
9.5 ... 15.5 VDC, 20 mA typical
Heating power supply
20 VDC or VAC, 500 mA typical
Output
6-bit parallel GRAY code
1)
Transducer output level
(I
out
< +5 mA)
High state > U
in
1.5 V
(I
out
> 5 mA)
Low state < 1.5 V
Settling time after power turn-on
< 100 µs
Electrical connections
MIL-C-26482 type; 10-wire cable
Operating temperature
50 ... +55 °C (with shaft heating)
Storage temperature
60 ... +70 °C
Material
Housing
AlMgSi, grey anodized
Vane
AlSi12, anodized
Dimensions & Weight
300 (h) × 90 (Ø) mm; 660 g
Swept radius of vane: 172 mm
MAINTENANCE AND REPAIR
Ball bearings must be checked once a year visually and by rotating
the sensor shaft. To do this, remove the vane assembly. To ensure
proper operation, the shaft should spin smoothly and it should not
create any detectable noise.
To replace the ball bearings
1
Remove the vane assembly.
There are three screws at the vane assembly center. Do not
loosen the glue filled screw at the far side. The lockscrew
for the vane assembly is the lower one shown in figure 4.
2
Loosen the hex nut of the connector (with 27 mm tool).
Caution: Bending may break the connector pins!
3
Loosen the three pan head screws at the bottom of the sen-
sor body (with 7 mm tool).
4
Remove the lower body assembly by pulling it straight out-
wards.
5
Loosen the spacer screws and the heating element outlet.
6
Remove the printed circuit board. Do not twist nor bend
the connector; bending may break pins.
7
Loosen the code disc fixing screw and remove the disc.
8
Remove the retaining ring (using narrow-pointed pliers).
9
Remove the spacer ring.
10
Remove the external retaining ring at the shaft (using
narrow-pointed pliers).
11
Remove the lower bearing.
12
Push out the shaft through the upper body.
13
Remove the top bearing.
Be careful when handling the ball bearings.
Reverse work order for assembling the sensor.
The disc must be positioned so that it does not touch the opto-
coupler at any rotary position of the shaft.
When placing the lower body assembly, make sure that the O-
ring is correctly positioned between the upper and lower bodies.
It is recommended to replace the O-ring by a new one before re-
assembly.
The heating resistance element cannot be removed without special
tools. It is recommended that replacing of the heating element is
carried out by the manufacturer.
The wind vane has been counterbalanced at the factory but can be
readjusted, if necessary. To do this, loosen the vane assembly and
place it on its side on the table. A correctly balanced vane will stay
in horizontal position.
Spare parts:
Order number:
Wind tail
6386WA
Set of bearings & gasket
16644WA
1)
Output from connector pins C...H:
(°) Output (°)
Output
CDEFGH
CDEFGH
N 0
000000
E 90
011000
6
000001
96
011001
11
000011
101 011011
17
000010
107 011010
23
000110
113 011110
28
000111
118 011111
34
000101
124 011101
39
000100
129 011100
45
001100
135 010100
51
001101
141 010101
56
001111
146 010111
62
001110
152 010110
68
001010
158 010010
73
001011
163 010011
79
001001
169 010001
84
001000
174 010000
(°)
Output (°)
Output
CDEFGH
CDEFGH
S 180
110000
W 270
101000
186
110001
276
101001
191
110011
281
101011
197
110010
287
101010
203
110110
293
101110
208
110111
298
101111
214
110101
304
101101
219
110100
309
101100
225
111100
315
100100
231
111101
321
100101
236
111111
326
100111
242
111110
332
100110
248
111010
338
100010
253
111011
343
100011
259
111001
349
100001
264
111000
354
100000
Figure 4. WAV151 assembly
Ref. WAV151-U185en-1.1