05305-L RM Young Wind Monitor AQ

Name: 05305-L - RM Young Wind Monitor AQ
Brand: Campbell Scientific

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Wind Speed and Wind Direction Sensors / 05305-L

Reliable, Accurate Wind Measurements
Suitable for air quality applications

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Detailed Description
Compatibility
Specifications
Documents
Videos and Downloads
FAQs

Overview

The 05305 is a lightweight, high-performance wind-speed and wind-direction sensor designed specifically for your air-quality measurements. It is more responsive but less rugged than the other wind monitors. Manufactured by R. M. Young, this sensor is cabled for use with Campbell Scientific dataloggers.

Compatible with most Campbell Scientific data loggers
Constructed with thermoplastic material that resists corrosion from sea-air environments and atmospheric pollutants
Lower starting threshold, faster response, and higher accuracy than the other wind monitors
Meets or exceeds requirements of the following regulatory agencies: U.S. Environmental Protection Agency, U.S. Nuclear Regulatory Agency, and American Nuclear Society
Compatible with the LLAC4 4-channel Low-Level AC-Conversion Module, which increases the number of anemometers one data logger can measure
Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network

The "-L" on a product model indicates that the cable length is specified at the time of order.

Images

Detailed Description

The 05305 is made out of lightweight, UV-stabilized thermoplastic with stainless steel and anodized aluminum fittings. The thermoplastic material resists corrosion from sea air environments and atmospheric pollutants. It uses stainless-steel precision-grade ball bearings for the propeller shaft and vertical shaft bearings.

The 05305 measures wind speed with a helicoid-shaped, four-blade propeller. Rotation of the propeller produces an ac sine wave that has a frequency directly proportional to wind speed. The ac signal is induced in a transducer coil by a six-pole magnet mounted on the propeller shaft. The coil resides on the non-rotating central portion of the main mounting assembly, eliminating the need for slip rings and brushes.

Wind direction is sensed by the orientation of the fuselage-shaped sensor body, which is connected to an internal potentiometer. The datalogger applies a known precision excitation voltage to the potentiometer element. The output is an analog voltage signal directly proportional to the azimuth angle.

Designed specifically for air quality measurements, the 05305 provides a lower starting threshold, faster response, and higher accuracy than the other wind monitors. It meets or exceeds the requirements published by the following regulatory agencies:

U.S. Environmental Protection Agency—Ambient Monitoring Guidelines for Prevention of Significant Deterioration (PSD) and On-Site Meteorological Instrumentation Requirements to Characterize Diffusion from Point Sources
U.S. Nuclear Regulatory Agency—NRC Regulatory Guide 1.23 Meteorological Programs in Support of Nuclear Power Plants
American Nuclear Society—Standard for Determining Meteorological Information at Nuclear Power Plants

Compatibility

Mounting

The 05305 can be attached to a crossarm via a 17953 NU-RAIL fitting or CM220 Right Angle Mounting Bracket. Alternatively, it can be attached to the top of a CM106B or a stainless-steel tripod via the CM216 Sensor Mounting Kit.

Programming

The 05305's propeller is measured by the PulseCount Instruction in CRBasic and by Instruction 3 (Pulse Count) in Edlog. The wind vane is measured by the BrHalf Instruction in CRBasic and by Instruction 4 (Excite-Delay-SE) in Edlog. The measurements are typically processed for output with the Wind Vector instruction (not present in the CR500 or CR9000 but is present in the CR9000X).

Specifications

Applications	General (Rain with light snow. Little or no riming or blowing sand. No salt spray.) Air quality (Designed to meet specific government standards for air-quality applications.)
Sensor	Helicoid-shaped, 4-blade propeller and fuselage-shaped sensor body
Measurement Description	Wind speed and direction
Operating Temperature Range	-50° to +50°C (assuming non-riming conditions)
Mounting Pipe Description	34 mm (1.34 in.) OD Standard 1.0-in. IPS schedule 40
Housing Diameter	5 cm (2.0 in.)
Height	38 cm (15.0 in.)
Length	65 cm (25.6 in.)
Propeller Diameter	20 cm (7.9 in.)
Weight	1.1 kg (2.5 lb)

Wind Speed
Range	0 to 50 m/s (0 to 112 mph)
Accuracy	±0.2 m/s (±0.4 mph) or 1% of reading
Starting Threshold	0.4 m/s (0.9 mph)
Distance Constant	2.1 m (6.9 ft) 63% recovery
Output	ac voltage (three pulses per revolution) 90 Hz (1800 rpm) = 9.2 m/s (20.6 mph)
Resolution	(0.1024 m s^-1) / (scan rate in seconds) or (0.2290 mph) / (scan rate in seconds)

Wind Direction
Mechanical Range	0 to 360°
Electrical Range	355° (5° open)
Accuracy	±3°
Starting Threshold	0.5 m/s (1.0 mph) at 10° displacement
Distance Constant	1.2 m (3.9 ft) 50% recovery
Damping Ratio	0.45
Damped Natural Wavelength	4.9 m (16.1 ft)
Undamped Natural Wavelength	4.4 m (14.4 ft)
Output	Analog dc voltage from potentiometer (resistance 10 kohm) Linearity is 0.25%. Life expectancy is 50 million revolutions.
Voltage	Power switched excitation voltage supplied by data logger

Documents

Brochures

Manuals

05103, 05103-45, 05106, 05108, 05108-45, and 05305 Wind Monitors

Videos & Tutorials

Wind Monitor | Bearing Replacement - 3:14

Frequently Asked Questions

Number of FAQs related to 05305-L: 13

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Are replacement fins and nose cones available for the 05305-L?

Yes.
If the speed indicator on a wind monitor stops working, is there a part that can be replaced, or does the whole unit need to be replaced?

This depends on what is broken. Typically, Campbell Scientific can repair the unit, and the user does not have to purchase a new one.
Can the output of a wind monitor (05103-L, 05103-45-L, 05106-L, or 05305-L) be changed to analog dc voltage?

No.
If an existing wind set is replaced with a wind monitor (05103-L, 05103-45-L, 05106-L, 05305-L), will more than the multiplier and offset have to be changed in the data logger program?

The measurement instructions will likely remain the same. However, in addition to the multiplier and offset, the type of pulse may change for the wind speed, and the excitation voltage may change for the wind direction. For an explanation of how the data logger needs to be programmed, see the instruction manual.
What is the procedure for orienting a wind monitor (05103-L, 05103-45-L, 05305-L, or 05106-L) to the cardinal directions so that the wind direction readings are correct?

Orientation of the wind monitor is done after the data logger has been programmed, and the location of True North has been determined. True North is usually found by reading a magnetic compass and applying the correction for magnetic declination, where magnetic declination is the number of degrees between True North and Magnetic North. Magnetic declination for a specific site can be obtained from a USFA map, local airport, or through a computer service.
What is the power consumption (mA) of the 05103-L, 05103-45-L, 05305-L, and 05106-L anemometers?

The short answer is less than 0.01 mA. The wind speed signal requires no power. The wind direction portion of the sensor only uses a maximum of 0.5 mA when excited with 5 Vdc, and then it is only on for 0.016 s for every measurement. When the wind direction is measured every second (typical), the average current drain is less than 0.01 mA.
What is needed to connect a sensor that is compatible with wireless sensor interfaces to a CR800, CR1000, or CR3000 in a wireless network?

To incorporate a sensor that is compatible with wireless sensor interfaces into a wireless network, a CWS900-series wireless sensor interface is needed, as well as an A205 CWS-to-PC interface to configure it.
If the original calibration sheet gets lost, can another copy be requested?
This depends on the information contained in the calibration sheet:
- If the calibration sheet contains coefficient information, Campbell Scientific keeps a copy, and a replacement copy can be requested.
- If the calibration sheet does not contain coefficients, Campbell Scientific does not keep a copy. It may be possible to contact the original manufacturer for a replacement copy.
If a sensor automatically ships with a calibration sheet, what information is included on it?

The information included on a calibration sheet differs with each sensor. For some sensors, the sheet contains coefficients necessary to program a data logger. For other sensors, the calibration sheet is a pass/fail report.
Using Short Cut, how can the average wind direction be calculated?
1. Using Short Cut, click the applicable wind direction sensor in the Selected Sensors list of the Outputs screen.
2. The two output options enabled are Sample and WindVector. Select WindVector.
3. The WindVector instruction has output options. Select an option with mean wind direction in it.

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