Young WIND MONITOR-AQ 05305 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: 05305-90
REV: T102811
WIND MONITOR-AQ
MODEL 05305

Page 1 05305-90(T)
MODEL 05305
WIND MONITOR - AQ
INTRODUCTION
The Wind Monitor measures horizontal wind speed and direction.
Developed for air quality applications, it is accurate, sensitive, and
corrosion resistant. The main housing, nose cone, propeller, and
other internal parts are injection molded U.V. stabilized plastic. The
tail section is lightweight expanded polystyrene. Both the propeller
and vertical shafts use stainless steel precision grade ball bearings.
Bearings have shields to help exclude contamination and moisture.
Propeller rotation produces an AC sine wave signal with
frequency proportional to wind speed. This AC signal is induced in a
stationary coil by a six pole magnet mounted on the propeller shaft.
Three complete sine wave cycles are produced for each propeller
revolution.
Vane position is transmitted by a 10K ohm precision conductive
plastic potentiometer which requires a regulated excitation voltage.
With a constant voltage applied to the potentiometer, the output signal
is an analog voltage directly proportional to azimuth angle.
The instrument mounts on standard one inch pipe, outside diameter
34 mm (1.34"). An orientation ring is provided so the instrument can
be removed for maintenance and reinstalled without loss of wind
direction reference. Both mounting post assembly and orientation
ring are secured to the mounting pipe by stainless steel band clamps.
Electrical connections are made in a junction box at the base. A
variety of devices are available for signal conditioning, display, and
recording of wind speed and direction.
INITIAL CHECKOUT
When the Wind Monitor is unpacked it should be checked carefully
for any signs of shipping damage.
Remove the plastic nut on the propeller shaft. Install the propeller on
the shaft with the serial number of the propeller facing forward (into
the wind). The instrument is aligned, balanced and fully calibrated
before shipment; however, it should be checked both mechanically
and electrically before installation. The vane and propeller should
easily rotate 360° without friction. Check vane balance by holding
the instrument base 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.
The potentiometer requires a stable DC excitation voltage. Do not
exceed 15 volts. When the potentiometer wiper is in the 5° deadband
region, the output signal is “oating” and may show varying or
unpredictable values. To prevent false readings, signal conditioning
electronics should clamp the signal to excitation or reference level
when this occurs. NOTE: Young signal conditioning devices
clamp the signal to excitation level. Avoid a short circuit between
the azimuth signal line and either the excitation or reference lines.
Although there is a 1K ohm current limiting resistor in series with
the wiper for protection, damage to the potentiometer may occur if a
short circuit condition exists.
Before installation, connect the instrument to an indicator as
shown in the wiring diagram and check for proper wind speed
and azimuth values. To check wind speed, temporarily remove the
propeller and connect the shaft to an Anemometer Drive. Details
appear in the CALIBRATION section of this manual.
INSTALLATION
Proper placement of the instrument is very important. Eddies from
trees, buildings, or other structures can greatly inuence wind
speed and wind direction observations. To get meaningful data for
most applications, locate the instrument well above or upwind from
obstructions. As a general rule, the air ow around a structure is
WIND SPEED SPECIFICATION SUMMARY
Range 0 to 50 m/s (112 mph)
Sensor 20 cm diameter 4-blade helicoid
propeller carbon ber thermoplastic
Distance Constant 2.1 m (6.9 ft.) for 63% recovery
Threshold Sensitivity 0.4 m/s (0.9 mph)
Transducer Centrally mounted stationary coil,
2K ohm nominal DC resistance
Transducer Output AC sine wave signal induced by rotating
magnet on propeller shaft. 80 mV p-p at
100 rpm. 8.0 V p-p at 10,000 rpm.
Output Frequency 3 cycles per propeller revolution
(0.102 m/s per Hz)
WIND DIRECTION (AZIMUTH) SPECIFICATION SUMMARY
Range 360° mechanical, 355° electrical
(5° open)
Sensor Balanced vane, 48.3 cm (19 in) turning
radius.
Damping Ratio 0.45
Delay Distance 1.2 m (3.9 ft) for 50% recovery
Threshold Sensitivity 0.5 m/s (1.0 mph) at 10° displacement
0.7 m/s (1.6 mph) at 5° displacement
Damped Natural
Wavelength 4.9 m (16.1 ft)
Undamped Natural
Wavelength 4.4 m (14.4 ft)
Transducer Precision conductive plastic potentiometer,
10K ohm resistance (±20%), 0.25%
linearity, life expectancy 50 million
revolutions, rated 1 watt at 40°C, 0 watts
at 125°C
Transducer Excitation
Requirement Regulated DC voltage, 15 VDC max
Transducer Output Analog DC voltage proportional to azimuth
angle with regulated excitation voltage
applied across potentiometer.
GENERAL
Operating temperature: -50 to 50°C (-58 to 122°F)

Page 2
05305-90(T)
disturbed to twice the height of the structure upwind, six times the
height downwind, and up to twice the height of the structure above
ground. For some applications it may not be practical or necessary
to meet these requirements.
FAILURE TO PROPERLY GROUND THE WIND MONITOR
MAY RESULT IN ERRONEOUS SIGNALS
OR TRANSDUCER DAMAGE.
Grounding the Wind Monitor is vitally important. Without proper
grounding static electrical charge can build up during certain
atmospheric conditions and discharge through the transducers. This
discharge can potentially cause erroneous signals or transducer
failure. To direct the discharge away from the transducers, the
mounting post assembly in which the transducers are mounted is
made with a special antistatic plastic. Therefore it is very important
that the mounting post be connected to a good earth ground. There
are two ways this may be accomplished. First, the Wind Monitor may
be mounted on a metal pipe which is connected to earth ground.
The mounting pipe should not be painted where the Wind Monitor 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 an alternative method should be used. Inside the
junction box the terminal labeled EARTH GND is internally connected
to the antistatic mounting post. This terminal should be connected to
an earth ground (Refer to wiring diagram).
Initial installation is most easily done with two people; one to adjust
the instrument position and the other to observe the indicating device.
After initial installation, the instrument can be removed and returned
to its mounting without realigning the vane since the orientation ring
preserves the wind direction reference. Install the Wind Monitor
following these steps:
1. MOUNT WIND MONITOR
a) Place orientation ring on mounting post.
Do Not tighten band clamp yet.
b) Place Wind Monitor on mounting post. Do Not tighten band
clamp yet.
2. CONNECT SENSOR CABLE
a) Slide junction box cover up.
b) Route cable thru strain relief opening at bottom of junction box.
Secure cable by tightening packing nut.
c) Connect sensor cable to terminals. See wiring diagram.
d) Slide junction box cover down.
3. ALIGN VANE
a) Connect instrument to an indicator.
b) Choose a known wind direction reference point on the horizon.
c) Sighting down instrument centerline, point nose cone at
reference point on horizon.
d) While holding vane in position, slowly turn base until indicator
shows proper value.
e) Tighten mounting post band clamp.
f) Engage orientation ring indexing pin in notch at instrument
base.
g) Tighten orientation ring band clamp.
CALIBRATION
The Wind Monitor 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.
Accurate wind direction calibration requires a Model 18112 Vane
Angle Bench Stand. Begin by connecting the instrument to a
signal conditioning circuit which has some method of indicating
azimuth value. This may be a display which shows azimuth values
in angular degrees or simply a voltmeter monitoring the output.
Orient the base with the junction box at 180°. Visually align the
vane with the crossmarkings and observe the indicator output. If
the vane position and indicator do not agree within 5°, adjust the
potentiometer coupling inside the main housing. Details for making
this adjustment appear in the MAINTENANCE, potentiometer
replacement outline, step 7.
It is important to note that, while the sensor mechanically
rotates through 360°, the full scale wind direction signal from the
instrument occurs at 355°. The signal conditioning electronics
must be adjusted accordingly. For example, in a circuit where 0
to 1.000 VDC represents 0° to 360°, the output must be adjusted
for 0.986 VDC when the instrument is at 355°. (355°/360° X 1.000
volts = 0.986 volts)
Wind speed calibration is determined by propeller pitch and the
output characteristics of the transducer. Calibration formulas
showing wind speed vs. propeller rpm and output frequency are
included below. Standard accuracy is ± 0.3 m/s (0.6mph). For
greater accuracy, the device 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 using a signal from the
instrument, temporarily remove the propeller and connect an
Anemometer Drive (18802 or equivalent) to the propeller shaft.
Apply the appropriate calibration formula to the calibrating motor
rpm and adjust the electronics for the proper value. For example,
with the propeller shaft turning at 3600 rpm, adjust an indicator to
display 18.4 meters per second. (3600 rpm X 0.00512 m/s/rpm =
18.4 m/s).
CALIBRATION FORMULAS
Model 05305 Wind Monitor-AQ w / 08254 Propeller
WIND SPEED vs PROPELLER RPM
m/s = 0.00512 x rpm
knots = 0.00995 x rpm
mph = 0.01145 x rpm
km/h = 0.01843 x rpm
WIND SPEED vs OUTPUT
FREQUENCY
m/s = 0.1024 x Hz
knots = 0.1990 x Hz
mph = 0.2290 x Hz
km/h = 0.3686 x Hz
MAINTENANCE
Given proper care, the Wind Monitor should provide years of service.
The only components likely to need replacement due to normal wear
are the precision ball bearings and the wind direction potentiometer.
Only a qualied instrument technician should perform the replace-
ment. If service facilities are not available, return the instrument to the
company. Refer to the drawings to become familiar with part names
and locations. The asterisk * which appears in the following outlines
is a reminder that 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 begin to produce noisy signals
or become nonlinear. When signal noise or non-linearity becomes
unacceptable, replace the potentiometer. Refer to exploded view
drawing and proceed as follows:

Page 3 05305-90(T)
1. REMOVE MAIN HOUSING
a) Unscrew nose cone from main housing. Set o-ring aside for
later use.
b) Gently push main housing latch.
c) While pushing latch, lift main housing up and remove it from
vertical shaft bearing rotor.
2. UNSOLDER TRANSDUCER WIRE
a) Slide junction box cover up, exposing circuit board.
b) Remove screws holding circuit board.
c) Unsolder three potentiometer wires (white, green, black),
two wind speed coil wires (red, black), and earth ground wire
(red) from board.
3. REMOVE POTENTIOMETER
a) Loosen set screw on potentiometer coupling and remove it
from potentiometer adjust thumbwheel.
b) Loosen set screw on potentiometer adjust thumbwheel
and remove it from potentiometer shaft.
c) Loosen two set screws at base of transducer assembly
and remove assembly from vertical shaft.
d) Unscrew potentiometer housing from potentiometer
mounting & coil assembly.
e) Push potentiometer out of potentiometer mounting & coil
assembly by applying rm but gentle pressure on potentiometer
shaft.
4. INSTALL NEW POTENTIOMETER
a) Push new potentiometer into potentiometer mounting & coil
assembly.
b) Feed potentiometer and coil wires through hole in bottom
of potentiometer housing.
c) Screw potentiometer housing onto potentiometer
mounting & coil assembly.
d) Gently pull transducer wires through bottom of
potentiometer housing to take up any slack. Apply a
small amount of silicone sealant around hole.
e) Install transducer assembly on vertical shaft allowing 0.5
mm (0.020") clearance from vertical bearing. Tighten set
screws* at bottom of transducer assembly.
f) Place potentiometer adjust thumbwheel on potentiometer
shaft and tighten set screw*.
g) Place potentiometer coupling on potentiometer adjust
thumbwheel. Do Not tighten set screw yet.
5. RECONNECT TRANSDUCER WIRES
a) Using needle-nose pliers or a paper clip bent to form a small
hook, gently pull transducer wires through hole in junction box.
b) Solder wires to circuit board according to wiring diagram.
Observe color code.
c) Secure circuit board in junction box using two screws removed
in step 2b. Do not overtighten.
6. REPLACE MAIN HOUSING
a) Place main housing over vertical shaft bearing rotor. Be careful
to align indexing key and channel in these two assemblies.
b) Place main housing over vertical shaft bearing rotor until
potentiometer coupling is near top of main housing.
c) Turn potentiometer adjust thumbwheel until potentiometer
coupling is oriented to engage ridge in top of main housing.
Set screw on potentiometer coupling should be facing the front
opening.
d) With potentiometer coupling properly oriented, continue
pushing main housing onto vertical shaft bearing rotor until
main housing latch locks into position with a “click”.
7. ALIGN VANE
a) Connect excitation voltage and signal conditioning
electronics to terminal strip according to wiring diagram.
b) With mounting post held in position so junction box is facing
due south, orient vane to a known angular reference. Details
appear in CALIBRATION section.
c) Reach in through front of main housing and turn potentiometer
adjust thumbwheel until signal conditioning system indicates
proper value.
d) Tighten set screw* on potentiometer coupling.
8. REPLACE NOSE CONE
a) Screw nose cone into main housing until o-ring seal is
seated. Be certain threads are properly engaged to avoid
crossthreading.
FLANGE BEARING REPLACEMENT
If anemometer bearings become noisy or wind speed threshold
increases above an acceptable level, bearings may need
replacement. Check anemometer bearing condition using a Model
18310 Propeller Torque Disc. Bearings are replaced as follows.
1. REMOVE OLD BEARINGS
a) Unscrew nose cone. Set o-ring aside for later use.
b) Loosen set screw on magnet shaft collar and remove magnet.
c) Slide propeller shaft out of nose cone assembly.
d) Remove front bearing cap which covers front bearing.
e) Remove both front and rear bearings from nose cone
assembly. Insert edge of a pocket knife under bearing ange
and lift it out.
2. INSTALL NEW BEARINGS
a) Insert new front and rear bearings into nose cone.
b) Replace front bearing cap.
c) Carefully slide propeller shaft thru bearings.
d) Place magnet on propeller shaft allowing 0.5 mm (0.020")
clearance from rear bearing.
e) Tighten set screw* on magnet shaft collar.
f) Screw nose cone into main housing until o-ring seal is
seated. Be certain threads are properly engaged to avoid
crossthreading.
VERTICAL SHAFT BEARING REPLACEMENT
Vertical shaft bearings are much larger than the anemometer
bearings. Ordinarily, these bearings will require replacement less
frequently than anemometer bearings. Check bearing condition using
a Model 18331 Vane Torque Gauge.
Since this procedure is similar to POTENTIOMETER REPLACEMENT,
only the major steps are listed here.
1. REMOVE MAIN HOUSING
2. UNSOLDER TRANSDUCER WIRES AND REMOVE
TRANSDUCER ASSEMBLY Loosen set screws at base of
transducer assembly and remove entire assembly from vertical
shaft.
3. REMOVE VERTICAL SHAFT BEARING ROTOR by sliding it
upward off vertical shaft.
4. REMOVE OLD VERTICAL BEARINGS AND INSTALL NEW
BEARINGS. When inserting new bearings, be careful not to
apply pressure to bearing shields.
5. REPLACE VERTICAL SHAFT BEARING ROTOR.
6. REPLACE TRANSDUCER & RECONNECT WIRES
7. REPLACE MAIN HOUSING
8. ALIGN VANE
9. REPLACE NOSE CONE
*Max set screw torque 80 oz-in

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05305-90(T)
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 shown to comply with European
CE requirements for the EMC Directive. Please note that shielded
cable must be used.
Declaration of Conformity
R. M. Young Company
2801 Aero Park Drive
Traverse City, MI 49686 USA
Model 05305 WIND MONITOR - AQ
The undersigned hereby declares on behalf of R. M.
Young Company that the above-referenced product, to
which this declaration relates, is in conformity with the
provisions of:
Council Directive 2004/108/EC (December 15, 2004)
on Electromagnetic Compatibility
David Poinsett
R&D Manager

Page 5 05305-90(T)
CABLE & WIRING DIAGRAM

Page 6
05305-90(T)
BEARING REPLACEMENT & POTENTIOMETER ADJUSTMENT

Page 7 05305-90(T)
GENERAL ASSEMBLY & REPLACEMENT PARTS

Calibration Accessories
Model 18802
Anemometer Drive
Model 18112
Vane Angle Bench Stand
Model 18310
Propeller Torque Disc
Model 18331 Vane Torque Gauge
Model 18301
Vane Alignment Rod
Model 18212
Vane Angle Fixture-Tower Mount

Model 18802 Anemometer Drive provides a convenient and accurate way to rotate an anemometer shaft at
a known rate. The motor may be set to rotate clockwise or counter-clockwise at any rate between 200 and
15,000 RPM in 100 RPM increments. The LCD display is referenced to an accurate and stable quartz timebase.
For completely portable operation, the unit can be operated on internal batteries. For extended operation, an
AC wall adapter is included.
Model 18811 Anemometer Drive is identical to Model 18802 except the drive motor incorporates a
gear reducer for operation in the range of 20 to 990 RPM in 10 RPM increments. The lower range
is recommended for cup anemometer calibration.
Model 18112 Vane Angle Bench Stand is used for benchtop wind direction calibration of the Wind Monitor
family of sensors. The mounting post engages the direction orientation notch on the Wind Monitor. An easy to
read pointer indicates 0 to 360 degrees with 1/2 degree resolution.
Model 18212 Vane Angle Fixture - Tower Mount similar to the Model 18112, the tower mount feature allows use
on the tower as well as the bench top. The fixture is temporarily placed on the tower between the Wind Monitor
and its tower mounting. Index keys and notches are engaged to preserve direction reference.
Model 18310 Propeller Torque Disc checks anemometer bearing torque with 0.1 gm/cm resolu-
tion. The disc temporarily replaces the propeller for torque measurement or simple yet accurate pass/fail
checks. Charts included with the unit relate torque to propeller threshold with limits for acceptable
bearing performance.
Model 18312 Cup-Wheel Torque Disc checks cup anemometer bearing torque.
Model 18331 Vane Torque Gauge checks vane bearing torque of the Wind Monitor family sensors. Slip the
fixture over the main housing and make simple yet accurate vane torque measurements. Charts relating vane
torque to vane threshold provide limits for acceptable bearing performance.
Model 18301 Vane Alignment Rod helps align the vane of a wind sensor to a known direction reference during
installation. The base of the device has an index key that engages the direction orientation notch in the sensor
allowing the sensor to be removed without losing wind direction reference.
Specifications subject to change without notice.
YOUNG
Specifications
Ordering Information MODEL
R.M. YOUNG COMPANY
2801 Aero Park Drive
Traverse City, Michigan 49686 USA
TEL: [phone] FAX: [phone]
E-mail: [email protected]
Web Site: www.youngusa.com
ANEMOMETER DRIVE 200 to 15,000 RPM .............................................. 18802
ANEMOMETER DRIVE 20 TO 990 RPM .................................................. 18811
230V / 50-60 HZ INPUT POWER ................................................... ADD SUFFIX “H”
VANE ANGLE BENCH STAND .......................................................... 18112
VANE ANGLE FIXTURE - TOWER MOUNT ........................................... 18212
PROPELLER TORQUE DISC............................................................ 18310
CUP-WHEEL TORQUE DISC ........................................................... 18312
VANE TORQUE GAUGE ................................................................. 18331
VANE ALIGNMENT ROD ................................................................ 18301
Copyright © 2000 R.M. Young Company, Printed in U.S.A. 11/00
Range:
200 to 15,000 RPM in 100 RPM increments
Rotation:
Clockwise or Counter-Clockwise
Display Resolution:
1 RPM
Quartz Timebase Reference:
0.1 RPM
Power Requirement:
2x 9 V (alkaline or lithium) batteries
115 VAC wall adapter included
(230 VAC – add suffix H)
Range:
20 to 990 RPM in 10 RPM increments
Display Resolution:
0.1 RPM
Range:
0 to 360 degrees
Resolution:
0.5 degree
Range:
0 to 5.4 gm-cm
Resolution:
0.1 gm-cm
Range:
0 to 50 gm-cm
Resolution:
5 gm-cm
MODEL 18802 ANEMOMETER DRIVE
(Replaces 18801)
MODEL 18310, 18312 TORQUE DISC DEVICES
Calibration Accessories
MODEL 18811 ANEMOMETER DRIVE
(Replaces 18810)
MODEL 18112, 18212 VANE ANGLE
CALIBRATION DEVICES
MODEL 18331 VANE TORQUE GAUGE