METEOROLOGICAL INSTRUMENTS

INSTRUCTIONS

WIND MONITOR

MODEL 05103V-45

R.M. YOUNG COMPANY

2801 AERO PARK DRIVE, TRAVERSE CITY, MICHIGAN 49686, USA

TEL: (231) 946-3980 FAX: (231) 946-4772 WEB: www.youngusa.com

P/N: 05103V-45-90

REV: B062309

MODEL 05103V-45

WIND MONITOR

WIND SPEED SPECIFICATION SUMMARY

Range

Sensor

Transducer

Output Signal

0 to 100 m/s (224 mph)

14 cm diameter 4-blade helicoid polypropylene propeller, 29.4 cm air passage per revolution

Distance Constant 2.7 m (8.9 ft.) for 63% recovery

Threshold Sensitivity 1.0 m/s (2.2 mph)

Centrally mounted stationary coil,

2K Ohm nominal DC resistance

50 mV per M/S

WIND DIRECTION (AZIMUTH) SPECIFICATION SUMMARY

Range

Sensor

Damping Ratio

Delay Distance

360° mechanical, 355° electrical (5° open)

Balanced vane, 38 cm (15 in) turning radius.

0.3

1.3 m (4.3 ft) for 50% recovery

Threshold Sensitivity 1.1 m/s (2.4 mph) at 10° displacement

Damped Natural

Wavelength

Undamped Natural

Wavelength

Transducer

7.4 m (24.3 ft)

Output Signal

7.2 m (23.6 ft)

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

13.9 mV per degree

GENERAL

Power Requirement: 8 - 24 VDC (5mA @ 12 VDC)

Operating Temperature: -50 to 50°C (-58 to 122°F)

I

NTRODUCTION

The Wind Monitor-Alpine model measures horizontal wind speed and direction. It is rugged and corrosion resistant, yet accurate and light weight. External housing surfaces are coated with a special ice resistant coating to improve performance in harsh alpine conditions. Both the propeller and vertical shafts use stainless steel precision grade ball bearings.

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 wind direction 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 the mounting post assembly and the 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 so the serial number on the propeller faces forward

(into the wind). Engage the propeller into the molded ribs on the propeller shaft 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 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 "floating" 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 wind direction 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 wind direction 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.

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INSTALLATION

Proper placement of the instrument is very important. Eddies from trees, buildings, or other structures can greatly influence 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 flow around a structure is 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 cause erroneous signals or transducer failure.

To direct the discharge away from the transducers, the mounting post assembly is made with a special antistatic plastic. 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 difficult to ground the mounting post in this manner, the following 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) Refer to wiring diagram located at back of manual.

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 wind direction value. This may be a display which shows wind direction values in angular degrees or simply a voltmeter monitoring the output. Orient the base so the junction box faces due south. 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 signal conditioning 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 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 using a signal from the instrument, temporarily remove the propeller and connect an

Anemometer Drive 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 17.6 meters per second [3600 rpm X 0.00490 (m/s)/rpm =17.6 m/s]

Details on checking bearing torque, which affects wind speed and direction threshold, appear in the following section.

CALIBRATION FORMULAS

Model 05103V-45 Wind Monitor

WIND SPEED vs PROPELLER RPM m/s knots mph km/h

=

=

=

=

0.00490 x rpm

0.00952 x rpm

0.01096 x rpm

0.01764 x rpm

WIND SPEED vs 0-5 VDC OUTPUT m/s knots mph km/h

=

=

=

= mV x 0.0200

mV x 0.0389

mV x 0.0447

mV x 0.0720

WIND DIRECTION vs 0-5 VDC OUTPUT

DEGREES = mV x 0.072

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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 qualified instrument technician should perform the replacement. 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 fifty 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:

1. REMOVE MAIN HOUSING

a) Unscrew nose cone from main housing. Set o-ring aside for later use.

b) Remove 4 screws attaching housing.

c) Gently push main housing latch. (Inside housing)

d) While pushing latch, lift main housing up and remove it from vertical shaft bearing rotor.

2. UNSOLDER TRANSDUCER WIRES

a) Remove junction box cover, 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 extension.

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 firm but gentle pressure on potentiometer shaft extension. Set o-ring aside for later use.

f) Loosen set screw on potentiometer shaft extension and remove it from potentiometer shaft.

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”.

e) Replace 4 screws in housing skirt.

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 isseated.

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. If needed, bearings are replaced as follows.

4. INSTALL NEW POTENTIOMETER

a) Place potentiometer shaft extension with o-ring on new potentiometer (Gap 0.040") and tighten set screw*.

Regrease o-ring if necessary.

b) Push new potentiometer into potentiometer mounting & coil assembly.

c) Feed potentiometer and coil wires through hole in bottom of potentiometer housing.

d) Screw potentiometer housing onto potentiometer mounting

& coil assembly.

e) Gently pull transducer wires through bottom of potentiometer housing to take up any slack. Apply a small amount of silicone sealant around hole.

f) Install transducer assembly on vertical shaft allowing

0.5 mm (0.020") clearance from vertical bearing. Tighten set screws* at bottom of transducer assembly.

g) Place potentiometer adjust thumbwheel on potentiometer shaft extension and tighten set screw*.

h) Place potentiometer coupling on potentiometer adjust thumbwheel. Do Not tighten set screw yet.

*Max set screw torque 80 oz-in

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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 flange 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 cross-threading.

05103V-45-90

VERTICAL SHAFT BEARING REPLACEMENT

Vertical shaft bearings are much larger than the anemometer bearings. Ordinarily, these bearings 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

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 (see Declaration of

Conformity below). 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 05103V-45 Wind Monitor

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

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Calibration Accessories

Model 18802

Anemometer Drive

Model 18331 Vane Torque Gauge

Model 18112

Vane Angle Bench Stand

Model 18310

Propeller Torque Disc

Model 18301

Vane Alignment Rod

Model 18212

Vane Angle Fixture-Tower Mount

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YOUNG Calibration Accessories

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 resolution. 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.

Ordering Information MODEL

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

Specifications

MODEL 18802 ANEMOMETER DRIVE

(Replaces 18801)

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:

2x9 V (alkaline or lithium) batteries

115 VAC wall adapter included

(230 VAC – add suffix H)

MODEL 18811 ANEMOMETER DRIVE

(Replaces 18810)

Range:

20 to 990 RPM in 10 RPM increments

Display Resolution:

0.1 RPM

MODEL 18112, 18212 VANE ANGLE

CALIBRATION DEVICES

Range:

0 to 360 degrees

Resolution:

0.5 degree

MODEL 18310, 18312 TORQUE DISC DEVICES

Range:

0 to 5.4 gm-cm

Resolution:

0.1 gm-cm

MODEL 18331 VANE TORQUE GAUGE

Range:

0 to 50 gm-cm

Resolution:

5 gm-cm

Specifications subject to change without notice.

Copyright © 2000 R.M. Young Company, Printed in U.S.A. 11/00

R.M. YOUNG COMPANY

2801 Aero Park Drive

Traverse City, Michigan 49686 USA

TEL: (231) 946-3980 FAX: (231) 946-4772

E-mail: [email protected]

Web Site: www.youngusa.com

05103V-45-90

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