Manual
Chapter 2 _______________________________________________________________Introduction 
VAISALA _______________________________________________________________________ 11 
CHAPTER 2 
INTRODUCTION 
This chapter provides general information on upgrading from WS425 to 
WMT700 wind sensor series. 
NOTE 
In this manual, product types WMT701, WMT702 and WMT703 are 
commonly referred to as WMT700. 
When upgrading to WMT700, you have the following installation 
options: 
-  Basic installation procedure, which consists of mounting WMT700 
with the FIX70 mounting kit and the WMT700 mounting adapter. 
To upgrade to WMT700 according to this procedure, uninstall the 
WS425 wind sensor and mounting kit and follow the installation 
instructions in Vaisala WINDCAP
®
 Ultrasonic Wind Sensor Series 
WMT700 User's Guide. 
-  Retrofit installation procedure, which consists of mounting WMT700 
with a WS425 mounting kit and the WMT700 mounting adapter for 
FIX30/60. 
To upgrade to WMT700 according to this procedure, follow the 
instructions in Chapter 2, Retrofit Installation, on page 13 in this 
manual. 
After WMT700 has been installed and configured, you can start 
operating the wind sensor as follows: 
-  To receive wind measurement data messages, use serial 
communication. 
When using the WMT700 or MES12 profile, see the operating 
instructions in Vaisala WINDCAP
®
 Ultrasonic Wind Sensor Series 
WMT700 User's Guide. 
When using the WS425 or SDI-12 profiles, see the operating 
instructions in Chapter 5, Operating WMT700 with WS425 and SDI-
12 , on page 41 in this manual. 










