Section 1
Introduction
6
FT702LT Flat Front Wind Sensor Manual
1 INTRODUCTION
1.1 Product Overview
The FT702LT is a solid-state ultrasonic wind sensor which uses a patented Acoustic Resonance
airflow sensing technique to measure accurately both wind speed and direction. The FT702LT has
been specifically designed to operate in harsh environments such as offshore and lightning and ice-
prone areas. The wind sensor has no moving parts to degrade or wear-out and is designed for
applications requiring high reliability. The FT702LT helps reduce costly down-time and unscheduled
maintenance visits.
Mounting and aligning the sensor is very straightforward. The mounting flat on the sensor body
defines the 0
°
wind datum so that the sensor automatically aligns to a reference point. For operation in
ice-prone areas the FT702LT
is fitted with a highly effective thermostatically controlled ‘all-body’
heating system. A three element heater (one element located in the top of the sensor and two in the
bottom) is used to ensure that heat is evenly distributed over the entire surface area.
Figure 1: FT702LT Flat Front Wind Sensor
#
#
actual sensor shape varies between build versions
Maximum Sensor
Dimensions
h (mm)
w (mm)
Before build version 22
167
50
Build versions 22 and after
161
55
1.2 Build Versions and Labelling
Each time a substantial revision is made to the design of the wind sensor the build version number is
incremented. All new variants are backwards compatible with the previous build versions. Each uses
the same mounting, connector pin outs and signal characteristics and contains all the original functions.
Where a new function has been introduced the first build version to have it included is stated.
