Young 03002L User manual

METEOROLOGICAL INSTRUMENTS
INSTRUCTIONS
R.M. YOUNG COMPANY 2801 AERO PARK DRIVE, TRAVERSE CITY, MICHIGAN 49686, USA
TEL: [phone] FAX: [phone] WEB: www.youngusa.com P/N: 03002L-90
REV: D122816
WIND SENTRY
MODEL 03002L

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03002L-90(D)
MODEL 03002L
WIND SENTRY
(WITH 4-20mA OUTPUT)
INCLUDES MODELS 03102L & 03302L
INTRODUCTION
The Wind Sentry Anemometer and Vane measure horizontal wind
speed and wind direction. The small size, simplicity, and corrosion
resistant construction provide a professional quality instrument at
a modest cost. The cup wheel and vane shafts use stainless steel
precision instrument grade ball bearings which are lubricated with
a wide temperature range high quality instrument oil. Standard
bearings have light contacting seals to exclude contamination and
help retain lubricant for longer service life.
Cup wheel rotation produces an AC sine wave voltage signal with
frequency proportional to wind speed. Internal circuitry converts
the raw signal to 4 to 20 mA current output over the specied 0 to
50 m/s wind speed range.
Vane position is sensed by a 10K ohm precision conductive plastic
potentiometer. This signal is also converted to 4 to 20 mA current
output.
The sensor mounts on standard 1 inch pipe, outside diameter
34 mm (1.34") and is supplied with a cross arm and junction box
for cable connections. Wind Sentry anemometers and wind vanes
are available separately with similar mounting and junction box.
INITIAL CHECK-OUT
When the Wind Sentry is unpacked, check it carefully for any signs
of shipping damage.
Place the cup wheel on the anemometer shaft and secure it by
tightening the set screw on the side of the hub. The instrument is
aligned, balanced, and fully calibrated before shipment; however,
it should be checked both mechanically and electrically before
installation. The vane and cup wheel should easily rotate 360°
without friction. Check vane balance by holding the instrument so
the vane surface is horizontal. It should have near-neutral torque
without any particular tendency to rotate. A slight imbalance will
not degrade performance.
INSTALLATION
Proper placement of the instrument is very important. Eddies from trees,
buildings, or other structures can greatly inuence wind speed and
direction observations. To get meaningful data for most applications,
locate the instrument well above or upwind of such obstructions. As a
general rule, the air ow around a structure is disturbed to twice the
height of the structure upwind, six times the height downwind, and
twice the height of the structure above ground. For some applications
it may not be practical or necessary to meet these requirements.
Grounding the Wind Sentry is vitally important. Without proper
grounding, static electrical charge can build up during certain
atmospheric conditions and discharge through the transducers. This
discharge may cause erroneous signals or transducer failure. To
direct the discharge away from the transducers, housings in which the
transducers are mounted are made with a special anti-static plastic.
It is important that the mounting post be connected to a good earth
ground. There are two ways this may be accomplished. First, the
Wind Sentry may be mounted on a metal pipe which is connected
to earth ground. The mounting pipe should not be painted where the
Wind Sentry is mounted. Towers or masts set in concrete should be
connected to one or more grounding rods. If it is difcult to ground the
mounting post in this manner, the following method should be used.
Inside the junction box the screw labeled EARTH GND is connected
to the anti-static housings. This terminal should be connected to an
earth ground (Refer to wiring diagram).
WIND SPEED SPECIFICATION SUMMARY
Range 0 to 50 m/s (112 mph)
Gust Survival 60 m/s (134 mph)
Sensor 12 cm diameter cup wheel assembly
40 mm diameter hemispherical cups
Turning Factor 75 cm (2.46 ft)
Distance Constant 2.3 m (7.5 ft.) for 63% recovery
Threshold Sensitivity 1.1 m/s (2.5 mph)
Transducer Stationary coil, 1300 Ohm nominal DC
resistance
Output Signal 4-20 mA = 0-50 m/s
WIND DIRECTION (AZIMUTH) SPECIFICATION SUMMARY
Range 360° mechanical, 352° electrical (8° open)
Sensor Balanced vane, 16 cm (6.3 in) turning rad.
Damping Ratio 0.2
Delay Distance 0.5 m (1.6 ft) for 50% recovery
Threshold Sensitivity 1.3 m/s (2.9 mph) at 10° displacement
1.9 m/s (4.2 mph) at 5° displacement
Transducer Precision conductive plastic potentiometer,
10K ohm resistance (±20%),
1.0% linearity, life expectancy 50 million
revolutions, rated 1 watt at 40°C,
0 watts at 125°C
Output Signal 4 to 20 m/A = 0 to 360°
GENERAL
Power Requirement: 8 - 30 VDC (5mA @ 12 VDC)
Operating Temperature: -50 to 50°C (-58 to 122°F)

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03002L-90(D)
Vane alignment is most easily done with two people; one to adjust the
instrument position and the other to observe the indicating device.
When anemometer and vane are mounted on the same cross arm
(Model 03002), the azimuth potentiometer has been aligned at the
factory such that the mounting cross arm should be oriented North-
South with the vane on the North end.
To install the Wind Sentry, follow these steps:
1. MOUNT WIND SENTRY
a) Connect sensor cable to Wind Sentry junction box.
b) Place Wind Sentry on mounting post. Do Not tighten band
clamp yet.
c) Connect sensor cable to indicator.
2. ALIGN VANE
a) Select a known azimuth reference point on the horizon.
b) Sighting down vane center line, point counterweight at
reference point on horizon.
c) While holding vane in position, slowly turn base until indicator
displays proper value.
d) Tighten mounting post band clamp.
CALIBRATION
The Wind Sentry is fully calibrated before shipment and should
require no adjustments. Recalibration may be necessary after some
maintenance operations. Periodic calibration checks are desirable
and may be necessary where the instrument is used in programs
which require auditing of sensor performance.
For wind direction calibration, the following method can yield an
accuracy of ±5° or better if carefully done. Begin by connecting
the instrument to a signal conditioning circuit which indicates
wind direction value. This may be an indicator which displays
wind direction values in angular degrees or simply a voltmeter
monitoring the output. Hold or mount the instrument so the vane
center of rotation is over the center of a sheet of paper which has
30° or 45° cross markings. Position the instrument so the mounting
cross arm is oriented north-south with the vane on the north and the
anemometer on the south. With the counterweight pointing directly
at the anemometer the azimuth signal should correspond to 180°
or due south. Looking from above, visually align the vane with each
of the cross markings and observe the indicator display. It should
correspond to vane position within 5°. If not, it may be necessary
to adjust the relative position of the vane skirt and shaft. See step
3 in the MAINTENANCE section under potentiometer replacement.
It is important to note that while the sensor mechanically
rotates through 360°, full scale wind direction signal from the
signal conditioning occurs at 352°. The signal conditioning
electronics must be adjusted accordingly. For example, in a
circuit where 4 to 20 mA represents 0° to 360°, the output must
be adjusted for 19.6 mA when the instrument is at 352° full scale.
[((352°/360° X 16 mA) +4 mA)]
Wind speed calibration is determined by the cup wheel turning factor
and the output characteristics of the transducer. The calibration
formula relating cup wheel rpm to wind speed is shown below.
Standard accuracy is ±0.5 m/s (1.1 mph). For greater accuracy, the
sensor must be individually calibrated in comparison with a wind
speed standard. Contact the factory or your supplier to schedule a
NIST (National Institute of Standards & Technology) traceable wind
tunnel calibration in our facility.
To calibrate wind system electronics, temporarily remove the cup
wheel and connect a Model 18802 Anemometer Drive to the cup
wheel shaft. Apply the calibration formula to the motor rpm and adjust
the signal conditioning electronics for proper value. For example,
with the cup wheel shaft turning at 1800 rpm, adjust the indicator
to display 22.7 meters per second. (0.01250 X 1800 + 0.2 = 22.7)
CALIBRATION FORMULAS
Model 03102L Wind Sentry Anemometer
WIND SPEED vs CUP WHEEL RPM
m/s = (0.01250 x rpm) + 0.2
knots = (0.02427 x rpm) + 0.4
mph = (0.02795 x rpm) + 0.4
km/h = (0.04499 x rpm) + 0.7
WIND SPEED vs mA OUTPUT
m/s = (3.125 x mA) - 12.5
knots = (6.075 x mA) - 24.3
mph = (6.990 x mA) - 28.0
km/h = (11.250 x mA) - 45.0
WIND DIRECTION vs mA OUTPUT
DEGREES = (22.5 x mA)-90
MAINTENANCE
Given proper care, the Wind Sentry should provide years of
service. Because of its durable, corrosion resistant construction,
the instrument requires little maintenance. The only components
likely to require replacement due to normal wear are the precision
ball bearings and the azimuth potentiometer. Replacement of these
components should only be performed by a qualied instrument
technician. If service facilities are not available, return the instrument
to the factory. Refer to the accompanying drawings to become
familiar with part names and locations. Maximum torque on all set
screws is 80 oz-in.
POTENTIOMETER REPLACEMENT
The potentiometer has a life expectancy of fty million revolutions.
As it becomes worn, the element may produce noisy signals or
become non-linear. When the signal noise or non-linearity become
unacceptable, replace the potentiometer as follows:
1. REMOVE POTENTIOMETER
a) Remove three screws which secure upper and lower
sections of main housing.
b) Carefully remove upper housing exposing wiring
connections to circuit board.
c) Unsolder potentiometer wires from circuit board.
Note color coding.
d) Using a knife blade or similar instrument, loosen
potentiometer assembly from upper housing and slide
it out.
2. INSTALL NEW POTENTIOMETER
a) Slide new potentiometer cell into upper housing. Be
sure to engage cell key into housing notch.
b) Solder potentiometer wires to circuit board.
Observe color code.
c) Join two sections of main housing. Secure with screws
removed in step 1a.
3. ALIGN VANE
a) Connect excitation voltage and signal conditioning
electronics to instrument according to wiring diagram.
b) Loosen set screw in side of vane hub.
c) Position instrument so cross arm is oriented north-south
with vane on north side. Orient vane to a known angular
reference. (See CALIBRATION section.)
d) While holding vane in reference position, slowly turn
vane skirt until signal conditioning system indicates
proper value.
e) Ti g h t en se t s c r ew o n s i d e of v a n e h u b.
Do not exceed 80 oz-in torque.

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03002L-90(D)
ANEMOMETER FLANGE BEARING REPLACEMENT
If anemometer bearings become noisy or wind speed threshold
increases above an acceptable level, replace the bearings. Check
bearing condition by hanging an ordinary paper clip (0.5 gm) on the
outside edge of one cup while the instrument is held in a horizontal
position. The cup should rotate downward. Failure to rotate due to
the weight of the paper clip indicates anemometer bearings need
replacement. Repeat this test at different positions to check full
bearing rotation. Replace bearings as follows:
1. REMOVE BEARINGS
a) Loosen set screw on side of cup wheel hub. Remove cup
wheel.
b) Remove three screws which hold two sections of main
housing.
c) Carefully separate upper and lower housing. Remove coil
transducer assembly from upper housing. Do not disconnect
from circuit board.
d) Loosen screw and remove ring magnet on end of shaft
inside upper housing.
e) Slide shaft and skirt assembly out of both upper and lower
bearings.
f) Using knife blade under bearing ange, carefully remove
upper bearing.
g) Using a pencil, gently push out lower bearing from above.
2. INSTALL NEW BEARINGS
a) Insert new upper bearing. Use care not to apply excessive
pressure.
b) Slide cup wheel shaft through upper bearing.
c) Slide lower bearing on shaft inside upper housing.
d) Using ring magnet assembly, push lower bearing into
its seat in upper housing.
e) Secure ring magnet to shaft using screw removed in step
1d. Use a small amount of sealant on screw to prevent it
from loosening.
f) Join two housing sections. Secure using three screws
removed in step 1b.
g) Place cup wheel on shaft. Tighten set screw on side of hub.
Do not exceed 80 oz-in torque.
VANE FLANGE BEARING REPLACEMENT
If vane bearings become noisy or if wind direction threshold increases
above an acceptable level, replace the bearings. Check bearing
condition by adding two ordinary paper clips (0.5 gm each) to the
back edge of the vane n while the instrument and vane are held
in a horizontal position. Gently release the vane. It should rotate
downward. Failure to do so indicates the bearings need replacement.
Repeat this test at various positions to check full bearing rotation.
Since this procedure is similar to anemometer bearing replacement,
only the major steps are shown here:
1. REMOVE BEARINGS
(Remove coupling disc - same as ring magnet)
2. INSTALL NEW BEARINGS
3. ALIGN VANE (See CALIBRATION section)
EMC COMPLIANCE
This device complies with Part 15 of the FCC Rules. Operation
is subject to the following two conditions: (1) this device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own
expense.
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est conforme à Ia norme NMB-001 du Canada.
EN55011/CISPR 11, Group 1, Class B device.
Class B equipment is suitable for use in domestic establishments
and in establishments directly connected to a low voltage power
supply network which supplies buildings used for domestic
purposes.
Note:
Wind Sentry sensors with Line Driver Output may be disrupted
by radiated RF interference at 240-300 MHz. To meet EMC
Compliance, (2) YOUNG 18500 ferrite chokes must be installed
on the cable, one near the sensor, and one near the recording
instrument. (Each choke must have the cable pass through the
center hole at least 2 times, creating 1 loop around the outside as
shown below.)
WARRANTY
This product is warranted to be free of defects in materials and
construction for a period of 12 months from date of initial purchase.
Liability is limited to repair or replacement of defective item. A copy
of the warranty policy may be obtained from R. M. Young Company.
CE COMPLIANCE
This product has been tested and complies with European
CE requirements for the EMC Directive. Please note that shielded
cable must be used.

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03002L-90(D)
18500 FERRITE CHOKE (2)
(SEE EMC SECTION FOR USAGE)
CABLE & WIRING DIAGRAM
MODEL 03002L WIND SENTRY

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03002L-90(D)
CIRCUIT DIAGRAM
MODEL 03002l WIND SENTRY
(03640B WIND LINE DRIVER)

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03002L-90(D)
GENERAL ASSEMBLY & REPLACEMENT PARTS
MODEL 03002L WIND SENTRY
18500 FERRITE CHOKE (2)
WIND SENTRY VANE
MODEL 03302L
WIND SENTRY ANEMOMETER
MODEL 03102L