Section 1 Introduction
8 FT722 & FT742 (RS485) – FF & PM Sensors – User Manual
1.4 Major Changes Compared to Previous FT702LT Digital Products
• The FT742 has a higher speed range available (0-75m/s)
• New optional Overspeed Warning Scheme introduced (see Section 2.7). By default this feature
is disabled to match legacy behaviour
• This product has a faster data output rate (was up to 5Hz, now up to 10Hz)
• By default, the averaging filter now samples over the same time period, but averages twice as
many data points
• A new innovative mechanical design incorporating a series of “turbulators” (patent pending)
which condition the air flow to deliver improved accuracy
• An optional Selective Filter can be enabled (see Section 2.5), which rejects invalid wind data
from entering the averaging filter, thus improving data quality and reducing error flags. This
feature is disabled by default to match legacy behaviour
• The Acoustic Temperature and Anemometer Mount features were introduced in software V7.5
It is strongly recommended that customers carry out their own product validation before deployment of
the FT wind sensor.
1.5 FT722 and FT742 differences
The FT722 is capable of recording 0-50m/s wind speeds.
The FT742 is capable of recording 0-75m/s wind speeds.
Since the maximum speeds are different, the optional overspeed warning is triggered at different
speeds.
1.6 Disclaimer
There are no warranties, representations or conditions, expressed or implied of any kind given in this
manual for any particular design application. The Purchaser should independently undertake sufficient
testing to confirm validity and suitability of any design. The Purchaser assumes all risks and liability in
conjunction with the use of the information given.
Any warranty given by FT Technologies in respect of the Equipment is conditional upon the sensor
being handled, installed, integrated and operated in accordance within the guidelines given in this
manual.
FT Technologies can take no responsibility for the effectiveness of any sensor lightning protection
scheme implemented. The wind sensor has passed a wide range of EMC tests but FT Technologies
does not warrant the sensor to survive lightning strikes.
Information supplied by FT Technologies Ltd. shall not be construed as permission to license to operate
under, or recommendation to infringe any existing or pending patent, patent applications or trademarks.
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