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Campbell Met One 034B Instruction Manual

Manual is about: Wind Set

Summary of Met One 034B

  • Page 1

    Inst ruct io n manual met one 034b wind set revision: 9/16 c o p y r i g h t © 1 9 8 0 - 2 0 1 6 c a m p b e l l s c i e n t i f i c , i n c ..

  • Page 3: Guarantee

    Guarantee this equipment is guaranteed against defects in materials and workmanship. We will repair or replace products which prove to be defective during the guarantee period as detailed on your invoice, provided they are returned to us prepaid. The guarantee will not apply to: equipment which has ...

  • Page 5: Please Read First

    Please read first about this manual please note that this manual was originally produced by campbell scientific inc. Primarily for the north american market. Some spellings, weights and measures may reflect this origin. Some useful conversion factors: area: 1 in 2 (square inch) = 645 mm 2 length: 1 ...

  • Page 7: Precautions

    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 mai...

  • Page 9: Table Of Contents

    I 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. Precautions .........................................

  • Page 10

    Table of contents ii c. Wind direction sensor orientation ....................... C-1 d. Wind direction measurement theory ................... D-1 figures 7-1. 034b mounted on a crossarm using a #17953 nu-rail® crossover fitting ..........................................................................

  • Page 11: Met One 034B Wind Set

    1 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. This manual provides information...

  • Page 12: 4.  Quickstart

    Met one 034b wind set 2 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 short cut is an easy way to program you...

  • Page 14: 5.  Overview

    Met one 034b wind set 4 4. After selecting the sensor, click wiring diagram to see how the sensor is to be wired to the datalogger. The wiring diagram can be printed now or after more sensors are added. 5. Select any other sensors you have, then finish the remaining short cut steps to complete the p...

  • Page 15: 6.  Specifications

    Met one 034b wind set 5 table 5-1. Recommended cable lengths cm106 cm110 cm115 cm120 ut10 ut20 ut30 11 ft 14 ft 19 ft 24 ft 14 ft 24 ft 37 ft the 034b’s cable can terminate in: • pigtails that connect directly to a campbell scientific datalogger (option –pt). • connector that attaches to a prewired ...

  • Page 16: 7.  Installation

    Met one 034b wind set 6 threshold: 0.4 m s –1 (0.9 mph) accuracy: ± 4° resolution: potentiometer resistance: 0 to 10 kΩ open at crossover 6.3 general specifications operating temperature range: –30 to 70 °c weight: 907 g (2.0 lb) 7. Installation if you are programming your datalogger with short cut,...

  • Page 17

    Met one 034b wind set 7 4. Cover the set screw hole with one of the small round stickers included with the 034b. One of these labels is already installed on the hub covering the set screw that attaches the hub to the sensor. Extra labels are included with the 034b to recover the holes if the sensor ...

  • Page 18

    Met one 034b wind set 8 figure 7-1. 034b mounted on a crossarm using a #17953 nu-rail® crossover fitting figure 7-2. Cm200 series crossarm with cm220 right angle mounting bracket cm220 cm200 series crossarm.

  • Page 19

    Met one 034b wind set 9 7.2.2 mount to top of tripod the 034b can be attached to the top of a cm106b, cm110, cm115, or cm120 tripod via the cm216 sensor mounting kit (figure 7-3 ). The cm216 extends 10 cm (4 in) above the mast of the tripod. Figure 7-3. Cm216 mount 7.3 wiring connections to campbell...

  • Page 20

    Met one 034b wind set 10 the dataloggers can also measure wind speed on a control port. With this option the black wire is connected to the 5 v terminal. 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 ...

  • Page 21

    Met one 034b wind set 11 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 metres/second or miles/hour when the pulse count instruction is configured to output the r...

  • Page 22

    Met one 034b wind set 12 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 ...

  • Page 23: 9. References

    Met one 034b wind set 13 symptom: incorrect wind direction 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 (p. 6) . 8.2.2 wind speed symptom: no wind speed...

  • Page 24

    Met one 034b wind set 14.

  • Page 25: Into Crbasic Editor

    A-1 appendix a. Importing short cut code into crbasic editor 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 short cut creates files, which can be imported i...

  • Page 27

    B-1 appendix b. Example program the following cr1000 program measures the 034b every 5 seconds, and stores mean wind speed, unit vector mean direction, and standard deviation of the direction every 60 minutes. Wiring for the example is given in table b-1 . Table b-1. Wiring for example program colou...

  • Page 29: Orientation

    C-1 appendix c. Wind direction sensor orientation to get optimum wind direction data from your weather station, it is recommended that you set up your wind direction sensor with reference to true north (rather than magnetic north). This appendix provides advice on how to achieve this. C.1 magnetic d...

  • Page 30: Weather Station

    03002, 03101 & 03001 wind sentry c-2 figure c-2 declination angles – true north to west of magnetic north figure c-3 magnetic declination at 2012.5 (degrees relative to true north, positive is east) c.3 setting up the wind direction sensor on the basic weather station setting up the wind direction s...

  • Page 31

    Appendix c. Wind direction sensor orientation c-3 1. Fully install your weather station and establish communications with the datalogger. 2. Establish a reference point on the horizon coinciding with true north. 3. Sight down the centre line of the direction sensor and aim its nose cone at this refe...

  • Page 33: Measurement Theory

    D-1 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 th...

  • Page 34

    Campbell scientific companies campbell scientific, inc. 815 west 1800 north logan, utah 84321 united states www.Campbellsci.Com • info@campbellsci.Com campbell scientific africa pty. Ltd. Po box 2450 somerset west 7129 south africa www.Campbellsci.Co.Za • cleroux@csafrica.Co.Za campbell scientific s...