Young 05501 User Manual
METEOROLOGICAL INSTRUMENTS
INSTRUCTIONS
WIND MONITOR
INTRINSICALLY SAFE WITH 4-20mA OUTPUTS
MODEL 05501LM
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: 05501-90
REV: D102811
MODEL 05501LM
WIND MONITOR
Intrinsically Safe with 4-20 mA Outputs
INTRODUCTION
Model 05501LM Wind Monitor IS is an intrinsically safe wind sensor
that converts horizontal wind speed and direction measurements to
calibrated 4-20 mA signals. Each signal is derived from independent
2-wire loop-powered circuits. The sensor operates over a wide
ambient temperature range.
Intrinsic safety is achieved when the sensor is used with approved
barriers. Intrinsically safe systems are recognized as practical
and effective means of operating instruments in an explosive
environment. The technique limits the amount of energy available to
ignite explosive gases or ignitable mixtures. This is accomplished by
controlling the amount of voltage and current in the hazardous area.
When used with an approved Intrinsically Safe barrier, the Wind
Monitor IS can be used in Class 1, Division 1, Group A,B,C,D
hazardous areas. The categories are dened as follows:
WIND SPEED SPECIFICATION SUMMARY
Operating Range 0 to 60 m/s (134 mph)
Gust Survival 100 m/s (220 mph)
Sensor Type 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)
Output Signal 4-20 mA for 0 to 50 m/s (100 m/s optional)
Power Requirement: 10 to 30 VDC at 20 mA max
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
Natural Wavelength 7.4 m (24.3 ft) Damped
7.2 m (23.6 ft) Undamped
Output Signal 4-20 mA for 0 to 360°
Power Requirement: 10 to 30 VDC at 20 mA max
GENERAL
Ambient Temperature -50 to 50°C (-58 to 122°F)
Intrinsic Safety Class I, Division 1, Groups A, B, C, D
when installed with approved
Intrinsically Safe Barrier
(see Wiring Diagram)
Entity Approval Vmax = 30V
Imax = 100 mA
Ci = 0.01 uF
Li = 0.0 uH
Class I Locations in which ammable gases or vapors are or may
be present in quantities sufcient to produce explosive or
ignitable mixtures.
Division 1 Locations in which hazardous concentrations in the air
exist continuously, intermittently, or periodically under
normal operating conditions.
Group A Atmospheres containing acetylene
Group B Atmospheres containing hydrogen, or gases or vapors of
equivalent hazard, such as manufactured gas.
Group C Atmospheres containing ethyl-ether vapors, ethylene, or
cyclo-propane
Group D Atmospheres containing gasoline, hexane, naptha,
benzine, butane, propane, alcohol, acetone, benzol,
lacquer solvent vapors, or natural gas.
The Wind Monitor IS is rugged and corrosion resistant, yet accurate
and lightweight. Housing, nose cone, propeller, and other components
are injection molded with U.V. stabilized plastic. 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. Internal circuitry converts this signal to a
calibrated 4 to 20 mA current output.
Vane position is sensed by a 10K ohm precision conductive plastic
potentiometer. This signal is also converted to 4 to 20mA output.
The instrument mounts directly on a standard one inch pipe, outside
diameter 34 mm (1.34"). An orientation ring is provided so the
instrument can be removed for maintenance and re-installed 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 at the base.
INITIAL CHECK-OUT
When the instrument is unpacked, check it carefully for signs of
shipping damage.
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05501LM-90(D)
Remove the plastic nut on the propeller shaft. Install the propeller on
×+=
360
164
angle
mA
4
360
355
168.19 +
×≈
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.
INSTALLATION
PROPER ELECTRICAL CONNECTION IS CRITICAL
FOR SAFE USE IN HAZARDOUS LOCATIONS.
FAILURE TO DO SO COULD RESULT IN INJURY TO PERSONS
OR PROPERTY DAMAGE.
AN APPROVED INSTRINSICALLY SAFE BARRIER
MUST BE USED.
REFER TO WIRING DIAGRAM FOR CONNECTION DETAILS.
FOLLOW BARRIER MANUFACTURER'S GUIDELINES FOR
CORRECT INSTALLATION.
OBSERVE NEC CODES FOR WIRING IN HAZARDOUS
LOCATIONS OR EQUIVALENT.
The Wind Monitor IS must be connected through an approved
Intrinsically Safe barrier or its equivalent. Examples of approved
barriers include the following models from MTL (www.mtl-inst.com):
MTL 7087+ Passive diode barrier with resistors
MTL 7106 Diode barrier with active electronics
MTL 7206 Diode barrier with active electronics
MTL 5041 Isolated barrier with active electronics
MTL 5044 2-ch version of MTL5041
Entity Parameters for the Wind Monitor IS are as follows:
Accurate wind measurements require proper instrument placement.
Eddies from trees, buildings, or other structures can greatly inuence
wind speed and 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
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.
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. 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) Refer to diagram W05501L 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 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.
Vmax = 30 VDC
Imax = 100 mA
Li = 0.0 uH
Ci = 0.01 uF
Any approved barrier may be used provided that its specications and
the wiring connections fulll the following relationship:
Vmax > Voc
Imax > Isc
La > Li + Lw
Ca > Ci + Cw
Where:
Vmax = 30 VDC Max Open Circuit Voltage of 05501LM
Imax = 100 mA Max Short Circuit Current of 05501LM
Li = 0.0 uH Inductance of 05501LM
Ci = 0.01 uF Capacitance of 05501LM
Lw = Connecting Wire Inductance
Cw = Connecting Wire Capacitance
Voc = Maximum Open Circuit Voltage of IS Barrier
Isc = Maximum Short Circuit Current of IS Barrier
La = Maximum Allowed Inductance of IS Barrier
Ca = Maximum Allowed Capacitance of IS Barrier
CALIBRATION CHECK
The Wind Monitor IS is fully calibrated before shipment and should
require no adjustments. Periodic calibration checks are desirable and
may be necessary if the instrument is used in programs which require
auditing of sensor performance.
WIND DIRECTION
Place the instrument on a Young Model 18112 Vane Angle Bench
Stand. Connect the instrument to a signal conditioning circuit
which indicates wind direction. Move the vane to various angular
orientations on the Vane Angle Bench Stand and observe the Wind
Monitor output. Indicated vane angle should agree with actual angle
within ±3°. If measuring current output, use the following formula:
Note that while the sensor mechanically rotates through a full 360°,
the active region of the sensor ends at 355°. This means that the
highest obtainable reading occurs at 19.8 mA.
05501LM-90(D)
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