Chapter 3
– Mechanical & Electrical Installation
19
FT742-DM (4-20mA)
– Sensors
- User Manual
1. Pass the cable through the mounting pipe and pipe insert
2.
Push the slotted end of the pipe insert into the mounting pipe.
Apply a continuous seam of all-weather adhesive sealant
around each of the two channels, before pushing the insert
fully into the pipe, ensuring the shoulder is flat and any surplus
sealant is wiped away. This insert provides a smooth transition
for the sensor O ring to facilitate easy mounting of the DM with
no damage to the internal O ring (for alternative pipe sizes use
the available size adaptors)
3. Connect the cable to the wind sensor and lower the DM base
onto the pipe
4.
Rotate the sensor to align the central North (‘N’ datum,
feature) with magnetic North (or an alternative reference)
5. Tighten the four self-locking fasteners (4x part FT034)
ensuring an even distribution of pressure and firm contact with
the mounting pipe. The fixings use a thread-locking insert and
will provide resistance before they are fully engaged. In highly
corrosive environments (such as coastal installations) the use
of marine grade self-adhesive tape (such as USCGFP by 3M)
is recommended to apply over the top of the mounting
fasteners to ensure ease of removal. In these environments, it
is also beneficial to apply sealant around the base of the
sensor at the pipe interface to reduce build-up of corrosion that
could make sensor removal difficult.
Confirm the installation is safe and appropriate for the
environment.
FT provides optional size adaptors to suit mounting diameters of
25mm (FT031) and 50mm (FT032). Ensure the internal diameter
allows the interface cable to pass through.
Pipe Insert (FT033)
25mm size adaptor (FT031)
50mm size adaptor (FT032)
Figure 11: Direct-Mount Sensor Pipe Installation
– Including tapered pipe insert and size adaptors
