NRG Product Manual
Hybrid XT Anemometer
HybridXT_Anemometer_Manual
Rev. 15
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02 January 2020
Heater Operation
The heat source for the HXT is a self-regulating, constant-temperature heater. Constant heating
prevents condensation and corrosion and maintains proper bearing temperature for consistent
performance and transfer function. In severe wind and icing conditions, the HXT draws more power to
help remain clear of ice. As conditions improve, the HXT draws less power. The HXT’s self-regulating
feature increases reliability, insuring that the head does not reach excessive temperatures. Excessive
temperatures can stress bearing lubricants, wiring, and present a hazard in the presence of combustible
materials. The HXT’s heater is powered by 24 volt power, AC or DC, making it compatible with a wide
range of turbine controller power supplies and remote site equipment. An optional 120 / 240 V to 24 V
AC transformer is also available.
Following a brief inrush current, after approximately 30 seconds, the heater settles into its
temperature controlled mode.
Use a 15A slow-blow fuse be placed in-line with the heater.
Always power the heater on your HXT sensor! Failure to maintain constant
heating may lead to corrosion or inferior sensor performance. Constant heating
prevents condensation from forming on the bearings, enabling the sensor to
achieve a 10 year service cycle. If the sensor is used without the heater, the
warranty will be void.
Sensor surfaces (particularly the head and the upper body) can become quite hot
and may burn you; especially in warm ambient conditions.
Use caution when the heater power is on.
