Manual
Chapter 1 ________________________________________________________ General Information 
VAISALA ________________________________________________________________________ 9 
Safety 
Vaisala WINDCAP
®
 Ultrasonic Wind Sensor WMT701, WMT702, or 
WMT703 delivered to you has been tested for safety and approved as 
shipped from the factory. Note the following precautions: 
WARNING 
Make sure that you connect only de-energized wires. 
WARNING 
Using a long cable between different units (sensors, transmitters, power 
supplies, and displays) can cause a lethal surge voltage, if a lightning 
strike occurs in the vicinity. Always apply proper grounding procedures 
and follow the requirements of the local Electrical Code. 
WARNING 
To protect personnel (and the wind sensor), a lightning rod must be 
installed with the tip at least one meter above WMT700. The rod must be 
properly grounded, compliant with all local applicable safety regulations. 
Do not install the wind sensor above the top of the lightning protection 
rod. 
WARNING 
Do not install WMT700 when there is a risk of thunderstorm or lightning 
activity in the area. 
CAUTION 
When handling WMT700, do not rotate, pull, strike, bend, scrape or 
touch the transducers with sharp objects. Any impact on the wind sensor 
array damages the device. 
Trademarks 
Vaisala WINDCAP
®
 is a registered trademark of Vaisala Oyj. 
Windows
®
 is a registered trademark of Microsoft Corporation in the 
United States and/or other countries. 










