Vaisala HMD70U Service Manual Page 151

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Technical Data
Vaisala Anemometer WAA151
Wind Speed
Measurement range 0.4 ... 75 m/s
Starting threshold < 0.5 m/s *
Distance constant 2.0 m
Characteristic transfer function U = 0.328 + 0.101 × R
(where U = wind speed [m/s], R = output pulse rate [Hz])
Accuracy (within range 0.4 ... 60 m/s)
with characteristic transfer function ± 0.17 m/s **
with transfer function U = 0.1 × R ± 0.5 m/s***
Vaisala Wind Vane WAV151
Wind Direction
Measurement range at wind speed 0.4 ... 75 m/s 0 ... 360°
Starting threshold <0.4 m/s
Resolution ±2.8°
Damping ratio 0.19
Overshoot ratio 0.55
Delay distance 0.4 m
Accuracy better than ±3°
General
Operating power supply U
in
= 9.5 ... 15.5 VDC, 20 mA typical
Heating power supply AC or DC 20 V, 500 mA nominal
Output 0 ... 750 Hz square wave
Transducer output level
with I
out
< +5 mA high state > U
in
-1.5 V
with I
out
> –5 mA low state < 2.0 V
Settling time after power turn-on < 30 µs
Plug 6-PIN MIL-C-26482 type
Cabling 6-wire cable through crossarm
Recommended connector at cable end SOURIAU MS3116F10-6P
Operating temperature with heating -50 ... +55 °C (-58 ... +131
°F)
Storage temperature -60 ... +70 °C (-76 ... +158 °F)
Material
housing AlMgSi, grey anodized
cups PA, reinforced with carbon fibre
Dimensions 240 (h) × 90 (Ø) mm
Swept radius of cup wheel 91 mm
Weight 570 g
General
Operating power supply U
in
= 9.5 ... 15.5 VDC, 20 mA typical
Heating power supply AC or DC 20 V, 500 mA nominal
Output code 6-bit parallel GRAY
Output levels
With I
out
< +5 mA high state > U
in
–1.5 V
With I
out
> –5 mA low state < 1.5 V
Settling time after power turn-on < 100 µs
Plug 10-PIN MIL-C-26482 type
Cabling 10-wire cable through crossarm
Recommended connector at cable end SOURIAU MS3116F12-10P
Operating temperature with heating -50 ... +55 °C (-58 ... +131 °F)
Storage temperature -60 ... +70 °C (-76 ... +158 °F)
Material
housing AlMgSi, grey anodized
wave Alsi 12 anodized
Dimensions 300 (h) × 90 (Ø) mm
Swept radius of vane 172 mm
Weight 660 g
Test Compliance
Wind tunnel tests ASTM standard method D5366-93
(for starting threshold, distance constant, transfer function)
Exploratory vibration test MIL-STD-167-1
Humidity test MIL-STD-810E, Method 507.3
Salt fog test MIL-STD-810E, Method 509.3
Complies with EMC standard EN61326-1:1997 + Am1:1998;
Am2:2001; Generic Environment
Test Compliance
Wind tunnel tests ASTM standard method D5096-90
Exploratory vibration test MIL-STD-167-1
Humidity test MIL-STD-810E, Method 507.3
Salt fog test MIL-STD-810E, Method 509.3
Complies with EMC standard EN61326-1:1997 + Am1:1998 +
Am2:2001; Generic Environment
* Measured with cup wheel in position least favoured by flow
direction. Optimum position gives approx. 0.35 m/s threshold.
** Standard Deviation
*** Typical error vs. speed with the "simple transfer function" used.
Ref. B210382EN-B ©Vaisala 2009
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
RANGE (m/s) 0-3 3-10 10-17 17-24 24-31 31-37 37-44 44-51 51-58 58-65
ERROR (m/s) -0.4 -0.3 -0.2 -0.1 0.0 +0.1 +0.2 +0.3 +0.4 +0.5
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