User`s guide

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VAISALA ________________________________________________________________________ 3
Table of Contents
CHAPTER 1
GENERAL INFORMATION............................................................................7
About This Manual ................................................................... 7
Contents of This Manual ....................................................... 7
Version Information...............................................................8
Feedback............................................................................... 8
Safety.......................................................................................10
General Safety Considerations ........................................... 10
Product Related Safety Precautions ...................................10
Inverted Mounting ..........................................................10
Absolute Maximum Voltages .........................................10
ESD Protection....................................................................11
Regulatory Compliances.......................................................12
EN55011 Class A Group 1 & EN50082-2........................... 12
MIL-STD-426 Method RS03................................................ 12
MIL-STD 810 Method 501 Process 1.................................. 12
MIL-STD 202 Method 213................................................... 12
MIL-STD-167-1 (SHIPS) .....................................................12
Third-Party Testing (Field Tests Included).......................... 13
NWS ASOS Mechanical Wind Sensor Replacement .... 13
Lawrence Livermore Labs..............................................13
Tennessee Valley Authority ...........................................13
CETIAT (Centre Technique des Industries Aéraulique et
Thermiques)...................................................................13
Trademarks............................................................................. 14
License Agreement ................................................................ 14
Warranty..................................................................................14
CHAPTER 2
PRODUCT OVERVIEW................................................................................15
Introduction to WS425 ........................................................... 15
Measuring Principle.............................................................15
Sensor Operating Modes .................................................... 16
Sensor Features .....................................................................17
Polar Wind Speed and Direction......................................... 18
Wind Speed X and Y Components ..................................... 18
Scalar Averaging of Wind Speed and Direction.................. 18
Vector Averaging of Wind Speed and Direction..................19
Wind Direction Coasting...................................................... 19
Gust Wind Speed and Direction Over Time........................20
CHAPTER 3
INSTALLATION............................................................................................21
Selecting Location ................................................................. 21
Installation Procedure............................................................21
Unpacking Instructions........................................................21