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MODEL 86004-SDI
ULTRASONIC ANEMOMETER
1.0 SPECIFICATIONS
WIND SPEED
Range:
0-65 m/s (145 mph)
Resolution:
0.01 m/s
Accuracy:
0 to 30 m/s ±2% or 0.1 m/s
30 to 65 m/s ±3%
WIND DIRECTION
Azimuth Range:
0-360 degrees
Resolution:
0.1 degree
Accuracy:
± 2 degrees
SERIAL CONNECTION
Interface Type:
SDI-12 v1.3
GENERAL
Power Supply:
22 to 26 VDC 2.5A
Protection Class:
IP65
EMC Compliance:
FCC Class A digital device
IEC standard 61326-1
Dimensions:
29 cm high x 11 cm wide
Weight:
0.4 kg (0.9 lb)
Shipping Weight:
1.6 kg (3.5 lb)
Operating
Temperature:
-40 to +60°C
2.0 INTRODUCTION
The YOUNG 86004-SDI Ultrasonic Anemometer is a dynamically
heated 2-axis, no-moving-parts wind sensor with SDI-12 interface.
The heater minimizes snow and ice accumulation in harsh
cold-temperature environments where accurate and reliable
measurements are required. The sensor features wide operating
range, compact size, and easy installation.
The 86004-SDI measures wind speed and direction based on the
transit time of ultrasonic pulses between three transducers.
Measurement results are available in either polar (speed and
direction) or Cartesian (u and v) format using standard SDI-12
commands. Extended SDI-12 commands can be used to set all
significant operating parameters.
The sensor uses ultraviolet-stabilized thermoplastic for superior
environmental resistance. It is easily mounted on standard 1 inch
(IPS) pipe. An orientation ring preserves mounting position when
the sensor is removed.
The 86004-SDI arrives fully calibrated and ready to use. Connect
as shown in wiring diagram.
TEST COMPLEX CONFIGURATIONS
BEFORE INSTALLATION IN THE FIELD.
3.0 INSTALLATION
3.1 PLACEMENT
Proper instrument placement is important. Eddies from buildings,
trees, or other structures can influence measurements. For most
applications, locate the sensor well above or upwind of obstructions.
As a general rule, air flow around a structure is disturbed to 2 times
the height of the structure upwind, 6 times the height downwind, and
up to 2 times the height of the structure above ground.
3.2 MOUNTING AND ALIGNMENT
Mount the sensor to standard 1-inch (IPS) pipe that has an outside
diameter of 1.34 inches (34 mm).
Most applications require aligning the sensor to geographic north
(0 degrees). In this orientation the sensor junction box faces SOUTH
(180 degrees). See the diagram in APPENDIX B.
3.2.1 Place orientation ring over pipe with guide pin up.
3.2.2 Place sensor mounting post over pipe.
3.2.3 Using the transducers as a sighting aid, align the sensor
with a feature on the horizon that represents the proper
orientation. After alignment, tighten the mounting post
band clamp to secure the position. DO NOT OVER-
TIGHTEN.
3.2.4 Slide the orientation ring up so its guide pin is fully engaged
in the sensor mounting post notch. Tighten the orientation
ring band clamp to secure its position. DO NOT OVER-
TIGHTEN.
If the sensor needs to be removed later, leave the orientation ring on
the pipe to preserve sensor alignment.
3.3 WIRING CONNECTIONS
With long cable lengths, resistance in the power supply wires reduces
the available voltage at the sensor. Power at the sensor must be
in the range of 22 to 26 VDC when the sensor is operating. See
WIRING DIAGRAMS on following pages.
Page 1
86004-SDI-90(D)
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