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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

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