Chapter 3
– Mechanical & Electrical Installation
14
FT742-DM (4-20mA)
– Sensors
- User Manual
3 MECHANICAL & ELECTRICAL INSTALLATION
The wind sensor has no moving parts to degrade or wear-out and is designed for applications requiring high
reliability and cold weather operation.
Figure 7: Direct-Mount Wind Sensor
Direct Mount sensors are mounted vertically with the cable connector routed through a 33.7mm (outer diameter)
hollow pipe (EN10255 standard sizes). 4 M6 screws are required to secure the sensor onto the pipe (Figure 11).
The sensor body is manufactured from hard-anodised aluminium and the cavity has a water-repellent coating.
A suitable compass (not supplied) can be used to align the sensor with magnetic North using th
e convenient ‘N’
alignment marking and the alignment flat. The magnetic North marking indicates 0° and rotates clockwise when
viewed from above (Figure 10). The alignment flat is used with a square-sided compass for rotational alignment.
Magnetic North should be lined up to face parallel to the
‘N’ marking feature (Figure 12).
Ensure the airflow into the sensor is not obstructed or influenced by nearby objects.
In order to keep the pressure within the sensor equalised with the atmospheric pressure, a small breather hole
is located within the connector housing compartment that should not be blocked.
See safety instruction requirements on pages 4 and 5.
The wind sensor installation must be properly designed to ensure the correct operation of
the sensor. This section is for guidance only. It is the responsibility of the designer and
installer to ensure that the installation and its design are safe and fit for purpose. Please
see disclaimer Section 1.4.
