Young 05103L User Manual

METEOROLOGICAL INSTRUMENTS

INSTRUCTIONS

WIND MONITOR

WITH 4-20 mA OUTPUTS

MODEL 05103L

R.M. YOUNG COMPANY 2801 AERO PARK DRIVE, TRAVERSE CITY, MICHIGAN 49686, USA

TEL: [phone] FAX: [phone] WEB: www.youngusa.com

P/N: 05103L-90

REV: H102811

MODEL 05103L

WIND MONITOR
with 4-20mA OUTPUTS

INTRODUCTION

The 05103L Wind Monitor measures wind speed and direction
and provides calibrated win d speed and dir ection signals via
independent loop-powered 4-20 mA analog transmitters. Sensor
housing, nose cone, propeller, and other components use molded
UV-stabilized plastic for strength, corrosion resistance, light weight,
and fast response . Both the propell er and verti cal sh afts u se
stainless steel precision grade ball bearings.

The sensor mounts directly on standard one inch pipe, outside
di ame ter 34 mm (1.34 "). An o rie nta tio n ri ng all ows sen sor
removal without loss of wind direction reference. Both sensor and
orientation ring are secured to the mounting pipe by stainless steel
band clamps. Electrical connections are made in a junction box on
the mounting post.

INITIAL CHECK-OUT

Carefully unpack and check the Wind Monitor for any signs of
shipping damage. Remove the plastic nut on the propeller shaft.
Install th e prope ller on the shaft with t he seri al number of the
propeller facing forward (into the wind) and replace the nut.

Vane and propeller should easily rotate 360° without friction. Check
vane balance by holding the instrument mounting post so the vane
surface is horizontal. It should have near neutral torque. A slight
imbalance will not degrade performance.

WIND SPEED SPECIFICATION SUMMARY

Range 0 to100 m/s (224 mph)
Sensor 18 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)
Transducer Centrally mounted stationary coil, 2K Ohm

nominal DC resistance
Output Signal 4 to 20 mA = 0 to 100 m/s

WIND DIRECTION (AZIMUTH) SPECIFICATION SUMMARY

Range 360° mechanical, 355° electrical (5° open)
Sensor Balanced vane, 38 cm (15 in) turning radius.
Damping Ratio 0.3
Delay Distance 1.3 m (4.3 ft) for 50% recovery
Threshold Sensitivity 1.1 m/s (2.4 mph) at 10° displacement
Damped Natural
Wavelength 7.4 m (24.3 ft)
Undamped Natural
Wavelength 7.2 m (23.6 ft)
Transducer Conductive plastic potentiometer,
10K ohm resistance (±20%),

0.25% linearity, life expectancy 50 million

revolutions

Output Signal 4 to 20 mA = 0 to 360°

GENERAL

Power Requirement: 12 to 30 VDC, 20 mA per channel
Operating Temp: -50 to 50°C (-58 to 122°F)

Che ck operation wit h displays, data loggers, o r other dev ices
before installation.

INSTALLATION

As a general rule, air ow 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. To obtain
meaningful data for most applications, locate the instrument well
above or upwind from obstructions. For some applications it may
not be practical or necessary to meet these requirements.

CONNECT THE WIND MONITOR TO EARTH GROUND

AS SHOWN IN THE WIRING DIAGRAM TO AVOID

ERRONEOUS SIGNALS OR SENSOR DAMAGE.

Initial installation is most easily performed using two people; one
to adjust instrument position and the other to observe an indicating
device. After initial installation with the included orientation ring, the
instrument can be removed and returned to its mounting without
re-alignment. Install the Wind Monitor following these steps:

1. MOUNT WIND MONITOR
a) Place orientation ring on mounting post. Do Not tighten band

clamp yet. (Orientation ring may be omitted when portable
tripod is used.)

b) Place Wind Monitor on mounting post. Do Not tighten band

clamp yet.

2. CONNECT SENSOR CABLE.
a) Connect sensor cable according to wiring diagram located at

back of manual.

3. ALIGN VANE
a) Connect instrument to indicator.
b) Choose a known wind direction reference point on the

horizon.

c) Sighting down instrument center line, point nose cone at

reference point on horizon.

d) While holding vane in position, slowly turn base until indicator

shows proper value.

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05103L-90(H)

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 05103L Wind Monitor is fully calibrated before shipment and
requires no additional adjustment. Check sensor calibration once
per year or as needed. Please see the wiring diagram for output
scaling information.

Calibration checks can be easily performed in the eld using the
calibration accessories available from YOUNG. NIST traceable
win d tunnel calibration is also availab le. Contact YOUNG for
details.

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

CALIBRATION FORMULAS

Model 05103L Wind Monitor w / 08234 Propeller

WIND SPEED vs PROPELLER RPM

m/s = 0.00490 x rpm
knots = 0.00952 x rpm
mph = 0.01096 x rpm
km/h = 0.01764 x rpm

WIND SPEED vs mA OUTPUT

m/s = ( 6.250 x mA)-25
knots = (12.141 x mA)-48.6
mph = (13.980 x mA)-56
km/h = (22.500 x mA)-90

WIND DIRECTION vs mA OUTPUT
DEGREES = (22.5 x mA)-90

MAINTENANCE

Given pro per ca re, the Wi nd Mon itor should provi de years of
service. The only components likely to need replacement due to
normal wear are the precision ball bearings and the wind direction
potentiomet er. Only a qualif ie d instrument techni ci an 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 fty million revolutions.
As it becomes worn, the element may begin to prod uce noisy
signals or become non-linear. When signal noise or non-linearity
beco me s unac ce pt able, repl ac e the pot en ti ometer. Ref er 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) 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) 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.

05103L-90(H)

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 firm but gentle pressure on

potentiometer shaft. Make sure that the shaft o-ring

comes out with the potentiometer. If not, then gently

push it out from the top of the coil assembly.

4. INSTALL NEW POTENTIOMETER
a) Push new potentiometer into potentiometer mounting &

coil assembly making sure o-ring is on shaft.
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

cross-threading.

*Max set screw torque 80 oz-in

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