NRG Systems HYBRID XT VANE WRA User manual

NRG User Manual
Hybrid XT Vane & Anemometer | WRA
Hybrid_ XT_Vane_&_Anemometer_WRA_Manual
Rev. 4.0
[e-mail] | Page 2
TABLE OF CONTENTS
Customer Support....................................................................................................................4
Introduction.............................................................................................................................5
Transport and Handling............................................................................................................5
Sensor Identification ................................................................................................................5
Electrostatic Discharge (ESD) & Circuit Protection .....................................................................5
Using This Manual....................................................................................................................6
Hybrid XT Anemometer............................................................................................................7
Operation ...................................................................................................................................................... 7
Calibration.....................................................................................................................................................7
Hybrid XT Vane ........................................................................................................................7
Operation ...................................................................................................................................................... 7
South Mark....................................................................................................................................................7
Sensor Heater ..........................................................................................................................8
Operation ...................................................................................................................................................... 8
Power Considerations....................................................................................................................................8
Heater Power Supply Requirements ..............................................................................................................8
Sensor Power Supply Requirements............................................................................................................... 9
Sensor Installation.................................................................................................................. 10
Parts Required............................................................................................................................................. 10
Mounting Mast Orientation.................................................................................................... 12
Prepare Shield........................................................................................................................ 12
Mount Connector................................................................................................................... 13
Mount Sensor ........................................................................................................................ 14
Vane:........................................................................................................................................................... 15
Note: This configuration requires the external sense resistor NRG # 17884 (RES 125 OHM 1-2W 0.1% Axial)
.................................................................................................................................................................... 15
Boom bearing should be entered as actual, based on the site. Vane Mounting Angle is always
270 based on the bolt hole alignment, if "toward rotor" is away from the tower. Vane
Mounting Angle would be 90 if "toward rotor" is towards the tower............................................. 15
Logger Wiring:............................................................................................................................................. 15
Logger Programming................................................................................................................................... 16
Anemometer: .............................................................................................................................................. 16
Vane:........................................................................................................................................................... 16

NRG User Manual
Hybrid XT Vane & Anemometer | WRA
Hybrid_ XT_Vane_&_Anemometer_WRA_Manual
Rev. 4.0
[e-mail] | Page 3
Note: This configuration requires the external sense resistor NRG # 17884 (RES 125 OHM 1-2W 0.1% Axial)
.................................................................................................................................................................... 16
Boom bearing should be entered as actual, based on the site. Vane Mounting Angle is always
270 based on the bolt hole alignment, if "toward rotor" is away from the tower. Vane
Mounting Angle would be 90 if "toward rotor" is towards the tower............................................. 16
Logger Wiring:............................................................................................................................................. 17
Junction Box Wiring..................................................................................................................................... 17
Transformer Wiring ..................................................................................................................................... 19
Sensor Maintenance.................................................................................................................................... 19
Sensor Diagrams | Wind Vane #5762 ...................................................................................... 20
Table of Specifications | Wind Vane #5762 ............................................................................. 21
Table of Specifications | Anemometer #4718.......................................................................... 24
Power Requirements:............................................................................................................. 26
Two Year Limited Warranty.................................................................................................... 27

NRG User Manual
Hybrid XT Vane & Anemometer | WRA
Hybrid_ XT_Vane_&_Anemometer_WRA_Manual
Rev. 4.0
[e-mail] | Page 4
Customer Support
NRG Systems offers a variety of support options to help you get the most from your NRG
Systems product. If you have questions about your NRG Systems product, first look in the
product documentation and Knowledge Base contained in the Tech Support section of the NRG
Systems web site. If you cannot find the answer, contact your salesperson or NRG Systems
Technical Support for assistance using the information below. Customer support is available
8:30 AM to 5:00 PM EST, Monday through Friday.
NRG Systems
110 Riggs Road
Hinesburg, Vermont,
05461
USA
T | 802-482-2255
E | [email protected]
When you call or email, you should have the appropriate product documentation at hand and
be prepared to give the following information:
•Customer name
•Item number or description
•Serial number
•When equipment was purchased
•Where equipment is installed - terrain conditions
•Description of the problem with some detail
•What events took place leading up to the problem?
•What you have tried while attempting to solve the problem
NRG Systems maintains an extensive website which includes an in-depth customer
support area for NRG Systems customers. If you need assistance at times other than our regular
business hours, we suggest visiting our website, www.nrgsystems.com.
All instruments, sensors, software, and towers manufactured by NRG Systems are
designed to be reliable and easy to use. We welcome your comments and appreciate your help
in making NRG Systems products the best available.

NRG User Manual
Hybrid XT Vane & Anemometer | WRA
Hybrid_ XT_Vane_&_Anemometer_WRA_Manual
Rev. 4.0
[e-mail] | Page 5
Introduction
The Hybrid XT anemometer and wind direction vane are proven and reliable heated sensors
ideal for maximizing wind measurement data availability on meteorological towers in climates
that experience frequent icing. The Hybrid XT anemometer and vane can be used with all NRG
Systems data loggers.
Because the heaters and sensor signal require more power than typical meteorological sensors,
careful planning is necessary to ensure optimal performance.
The following document has been created to assist in the planning and installation of Hybrid XT
sensors on meteorological towers.
Transport and Handling
This sensor is a precision instrument. Please use care in its handling to protect the bearings and
shaft. It is recommended that the sensor be carefully placed on its side instead of standing up.
Use care when handling sensors. If a sensor tips over onto a hard surface, bearing or
shaft damage may occur.
Sensor Identification
Serial Number | The serial number is located on the name plate just under the bar code.
Electrostatic Discharge (ESD) & Circuit Protection
−Do not apply greater than 30V to the outputs at any time.
−Do not mount the sensor until proper grounding has been completed. When installing the
sensor, protect the signal wires and connect the ground wire first.
−There are internal TVS diodes on the output. If the output voltage is pulled above 30V, or below
ground, the diode will clamp the output to the ground.
−Do not apply constant reverse voltages to the outputs. The sensors are not designed to protect
against this type of voltage.
Failure to adequately ground the sensor may result in ESD damage and/or impaired
sensor function.
ESD damage is not covered by warranty.

NRG User Manual
Hybrid XT Vane & Anemometer | WRA
Hybrid_ XT_Vane_&_Anemometer_WRA_Manual
Rev. 4.0
[e-mail] | Page 6
Using This Manual
Read this manual completely before installing and operating the Hybrid XT anemometer. Follow
all instructions and recommendations closely.
This document and the sensor may use the following symbols:
Earth (Ground)
Chassis Ground
AC Voltage
AC or DC Voltage
DC Voltage
Hot Surface
This typeface within the body of the manual is used for general descriptions and instructions to
the user.
This typeface is used to warn users of a potential danger, either to themselves or to the sensor.

NRG User Manual
Hybrid XT Vane & Anemometer | WRA
Hybrid_ XT_Vane_&_Anemometer_WRA_Manual
Rev. 4.0
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Hybrid XT Anemometer
Kit #18015 | FG #4718
Square wave Output | 5m Cable
Operation
The Hybrid XT anemometer provides a high-level square wave output where the frequency (Hz)
is proportional to the wind speed. The square wave amplitude is determined by the power
supply voltage.
A typical logger/controller input stage may consist of overvoltage protection, low pass filter
(corner frequency of 100 Hz), limiter, and comparator. If unsure of your input circuit design,
please consult with NRG.
Calibration
If the Hybrid XT sensor has been calibrated, an individual calibration report has been shipped
with the sensor. If the calibration report should get lost, you may contact NRG with the sensor
serial number for a copy.
Hybrid XT Vane
Kit # 18016 | FG # 5762
4-20mA | 5m Cable
Operation
The Hybrid XT 4-20 mA Vane provides an industry-standard 4-20 mA output signal sourced by
the sensor. The output range of 4-20 mA corresponds to 0-359 degrees.
South Mark
The Hybrid XT vane uses the mounting bolt hole and “Toward Rotor label as the South mark
(180°).

NRG User Manual
Hybrid XT Vane & Anemometer | WRA
Hybrid_ XT_Vane_&_Anemometer_WRA_Manual
Rev. 4.0
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Sensor Heater
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.
Operation
The heat source for the Hybrid XT 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, ensuring that the head does not
reach excessive temperatures. This prevents excessive stress on bearing lubricants and wiring.
The Hybrid XT heater is powered by 24 volt power, AC or DC, making it compatible with a wide
range of remote site equipment. An optional 120/240V - 24 VAC transformer and AC switching
power converters are also available.
Power Considerations
−Hybrid XT sensors require 24V AC or DC power for the heater (+/- 3V).
−Upon initial startup, there is an in-rush current of approximately 9A with a duration of roughly 3
seconds.
−After 1 minute, the current settles under 3A constant (1A typical). This operating current can
range from 0.8A (~ 20W) up to 3A (~70W).
−The heater is self-regulating at a constant internal temperature of 170°C and will draw the
appropriate current to maintain the right temperature.
−When possible, use grid power. Connecting the 120/240 VAC to 24 VAC Transformer to the grid
is simple and dependable.
−If necessary, a remote power supply can be built and used to provide 24 VDC to the heaters.
−Following a brief inrush current, the heater quickly settles into its temperature-controlled mode.
−It is recommended that a 15 Amp slow-blow fuse or 10A circuit breaker be placed in line with
the heater.
Heater Power Supply Requirements
When designing a remote power supply to provide power to the heater, enough capacity is
needed to provide the maximum power (3A per sensor) for a predetermined amount of time.
Roughly, 3A for 24 hours is 72 Ah (or 144 Ah for a pair of sensors). If you expect to have 3 days
of worst-case conditions in a row, then your battery bank should be rated for 216 Ah (or 432 Ah

NRG User Manual
Hybrid XT Vane & Anemometer | WRA
Hybrid_ XT_Vane_&_Anemometer_WRA_Manual
Rev. 4.0
[e-mail] | Page 9
for a pair of sensors). Ultimately, power supply sizing is dependent on multiple factors and is a
judgment call.
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,
increasing accuracy, and enabling the sensor to achieve a 10-year
service cycle. If the sensor is used without the heater, the warranty
will be void.
Sensor Power Supply Requirements
Hybrid XT sensors require power, in addition to the heaters, for the signal measurements to be
read by the logger. Each sensor draws a maximum of 40mA constantly, so constant power of
80mA at 12V is required to power an anemometer and vane. In wattage: A total of 1 watt is
required for the pair of sensors. 80mA x 24 hours = 2 Amp-hours per day or 24 watt-hours per
day.
Once the power requirement has been determined, grid power or a power supply will need to
be created. Combinations of deep cycle 24V batteries, PV panels and/or a small wind turbine
(1kW) have been used successfully in the past.
Always power Hybrid XT sensors with external power. Utilizing the iPack
battery to power your Hybrid XT sensors will result in power failing to
the logger and loss of measurement data.

NRG User Manual
Hybrid XT Vane & Anemometer | WRA
Hybrid_ XT_Vane_&_Anemometer_WRA_Manual
Rev. 4.0
[e-mail] | Page 10
Sensor Installation
Parts Required
The diagram & table in this section show the part numbers required for installing Hybrid XT
sensors onto a tubular tower (8-10” diameter).