INSTRUCTION MANUAL Met One 034B Wind Set Revision: 9/14 C o p y r i g h t © 1 9 8 0 - 2 0 1 4 C a m p b e l l S c i e n t i f i c , I n c .
Limited Warranty “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service for twelve months from the date of shipment unless otherwise specified in the corresponding product manual. (Product manuals are available for review online at www.campbellsci.com.) Products not manufactured by CSI, but that are resold by CSI, are warranted only to the limits extended by the original manufacturer.
Assistance Products may not be returned without prior authorization. The following contact information is for US and international customers residing in countries served by Campbell Scientific, Inc. directly. Affiliate companies handle repairs for customers within their territories. Please visit www.campbellsci.com to determine which Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA), contact CAMPBELL SCIENTIFIC, INC., phone (435) 227-9000.
Precautions DANGER — MANY HAZARDS ARE ASSOCIATED WITH INSTALLING, USING, MAINTAINING, AND WORKING ON OR AROUND TRIPODS, TOWERS, AND ANY ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC. FAILURE TO PROPERLY AND COMPLETELY ASSEMBLE, INSTALL, OPERATE, USE, AND MAINTAIN TRIPODS, TOWERS, AND ATTACHMENTS, AND FAILURE TO HEED WARNINGS, INCREASES THE RISK OF DEATH, ACCIDENT, SERIOUS INJURY, PROPERTY DAMAGE, AND PRODUCT FAILURE.
Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction ................................................................. 1 2. Cautionary Statements ............................................... 1 3. Initial Inspection ......................................................... 1 3.1 Ships With List ....................................................................................
Table of Contents B. Example Program.................................................... B-1 C. Wind Direction Sensor Orientation ....................... C-1 C.1 Determining True North and Sensor Orientation ............................ C-1 D. Wind Direction Measurement Theory.................... D-1 Figures 4-1. D-1. 034B mounted on a crossarm using a 17953 NU-RAIL crossover fitting................................................................................................
Met One 034B Wind Set 1. Introduction The 034B Wind Set combines a 3-cup anemometer and vane into a single integrated package to measure wind speed and direction. It is cabled for use with our dataloggers, and can provide measurements for a variety of applications. NOTE 2. 3. This manual provides information only for CRBasic dataloggers. It is also compatible with most of our retired Edlog dataloggers. For Edlog datalogger support, see an older manual at www.campbellsci.
Met One 034B Wind Set 3.1 Ships With List The 034B Wind Set ships with: (1) 1/16-inch Allen wrench (1) Bushing from Met One (1) Calibration Sheet (3) Direction hub stickers (1) ResourceDVD (1) Wind Vane (1) Sensor cable of user-specified length 4. Quickstart 4.
Met One 034B Wind Set determining True North using a compass and the magnetic declination for the site. 7. Remove the alignment screw at the base of the 034B (FIGURE 4-1). 8. Insert the 034B into the aluminum bushing provided with the sensor (see FIGURE 4-1). 9. Align the hole in the bushing with that in the 034B base and replace the screw (see FIGURE 4-1). 10. Insert the 034B/bushing into the NU-RAIL fitting (FIGURE 4-1) or the CM220’s U-bolt (FIGURE 4-2). 11.
Met One 034B Wind Set CM220 CM200 Series Crossarm FIGURE 4-2. CM200 Series Crossarm with CM220 Right Angle Mounting Bracket 4.2 Step 2—Use Short Cut to Program Datalogger and Generate Wiring Diagram Short Cut is an easy way to program the datalogger to measure the 034B and assign terminals. The following procedure shows using Short Cut to program the 034B. 4 1. Install Short Cut by clicking on the install file icon. Get the install file from either www.campbellsci.
Met One 034B Wind Set 3. When Short Cut opens, select New Program. 4. Select Datalogger Model and Scan Interval (default of 5 seconds is OK for most applications). Click Next.
Met One 034B Wind Set 5. Under the Available Sensors and Devices list, select the Sensors | Meteorological | Wind Speed & Direction folder. Select 034A/034B Wind Speed & Direction Sensor. Click to move the selection to the Selected device window. The wind speed defaults to meters/second. This can be changed by clicking the Wind Speed box and selecting one of the other options. 6 6.
Met One 034B Wind Set 5. 8. If LoggerNet, PC400, RTDAQ, or PC200W is running on your PC, and the PC to datalogger connection is active, you can click Finish in Short Cut and you will be prompted to send the program just created to the datalogger. 9. If the sensor is connected to the datalogger, as shown in the wiring diagram in step 6, check the output of the sensor in the datalogger support software data display to make sure it is making reasonable measurements.
Met One 034B Wind Set 6.1 6.2 6.3 7. Wind Speed Operating Range: 0 to 75 m s–1 (0 to 167 mph) Threshold: 0.4 m s–1 (0.9 mph) Accuracy: ±0.12 m s–1 (±0.25 mph) for wind speed < 10.1 m s–1 (22.7 mph) ±1.1% of reading for wind speeds > 10.1 m s–1 (22.7 mph) Output Signal: contact closure (reed switch) Resolution: (1.789 mph) / (scan rate in seconds) or (0.7998 m s–1) / (scan rate in seconds) Anemometer Height: 24.4 cm (9.6 in) Anemometer Radius: 10.7 cm (4.2 in) Wind Direction Length: 11.
Met One 034B Wind Set 7.2 Mounting Options The 034B can be attached to a CM200-series crossarm via a 17953 NU-RAIL fitting or a CM220, Right Angle Mounting Bracket. Procedure for using these mounts is provided in the Quickstart (Section 4.1, Step 1—Mount the Sensor). Alternatively, the 034B can be attached to the top of a CM106B, CM110, CM115, or CM120 tripod via the CM216, Sensor Mounting Kit. The CM216 extends 10 cm (4 in) above the mast of the tripod. FIGURE 7-1. CM216 mount 7.
Met One 034B Wind Set The dataloggers can also measure wind speed on a control port. With this option the black wire is connected to the 5 V terminal. NOTE 7.4 A 034B-L Wind Set purchased directly from Met One Instruments has a different configuration on the 6-pin connector. In addition, they do not have the 10 kΩ resistance on the excitation line. The wiring diagram and the multiplier and offset, for wind direction, are different than the examples in this document.
Met One 034B Wind Set The expression for wind speed (U) is: U = MX + B where M = multiplier X = number of pulses per second (Hertz) B = offset TABLE 7-2 lists the multipliers (M) and offsets (Off) to obtain meters/second or miles/hour when the Pulse Count instruction is configured to output the result in Hz. TABLE 7-2. Wind Speed Multiplier* Model Meters/Second Miles/Hour 034B M = 0.7989 Off = 0.28 M = 1.787 Off = 0.
Met One 034B Wind Set 7.4.4 Long Lead Lengths When sensor lead length exceeds 100 feet, the settling time allowed for the measurement of the vane should be increased to 20 milliseconds. For dataloggers programmed with CRBasic, increase the Settling Time parameter of the CRBasic instruction to 20 milliseconds (20,000 microseconds). 8. Sensor Maintenance Monthly • Do a visual/audio inspection of the anemometer at low wind speeds. Verify that the cup assembly and wind vane rotate freely.
Met One 034B Wind Set Symptom: Incorrect wind direction 9.2 1. Verify that the excitation voltage, range code, multiplier and offset parameters are correct for the datalogger type. 2. Check orientation of sensor as described in Section 7, Installation. Wind Speed Symptom: No wind speed 1. Check that the sensor is wired to the pulse channel specified by the pulse count instruction. 2. Disconnect the sensor from the datalogger and use an ohm meter to check the reed switch.
Met One 034B Wind Set 14
Appendix A. Importing Short Cut Code This tutorial shows: • • How to import a Short Cut program into a program editor for additional refinement How to import a wiring diagram from Short Cut into the comments of a custom program A.1 Importing Short Cut Code into a Program Editor Short Cut creates files that can be imported into CRBasic Editor program editor. These files normally reside in the C:\campbellsci\SCWin folder and have the following extensions: • • • • • • • .
Appendix A. Importing Short Cut Code After pasting, edit the information such that a ' character (single quotation mark) begins each line. This character instructs the datalogger compiler to ignore the line when compiling the datalogger code.
Appendix B. Example Program The following CR1000 program measures the 034B every 5 seconds, and store mean wind speed, unit vector mean direction, and standard deviation of the direction every 60 minutes. Wiring for the examples is given in TABLE B-1. TABLE B-1. Wiring for Example Program Color Description CR1000 Red Wind Spd. Signal P1 Black Wind Spd. Reference Green Wind Dir. Signal SE 1 Blue Wind Dir. Excitation EX 1 White Wind Dir. Reference Clear Wind Dir.
Appendix B.
Appendix C. Wind Direction Sensor Orientation C.1 Determining True North and Sensor Orientation Orientation of the wind direction sensor is done after the datalogger 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.
Appendix C. Wind Direction Sensor Orientation FIGURE C-1.
Appendix C. Wind Direction Sensor Orientation FIGURE C-2. Declination angles east of True North are subtracted from 0 to get True North FIGURE C-3.
Appendix C.
Appendix D. Wind Direction Measurement Theory It is not necessary to understand the concepts in this section for the general operation of the 034B, Wind Set with a Campbell Scientific datalogger. A 034B purchased from Campbell Scientific has a 9.53 kΩ fixed resistor and a variable resistor on the excitation line. The variable resistor is adjusted by the manufacturer so its resistance plus the 9.53 kΩ resistor equals the resistance of the potentiometer (Rf = Rs + Rt). FIGURE D-1.
Appendix D.
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