P2546A-L Anemometer 8/12 C o p y r i g h t © 2 0 1 2 C a m p b e l l S c i e n t i f i c , I n c .
Warranty “PRODUCTS MANUFACTURED BY CAMPBELL SCIENTIFIC, INC. are warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless otherwise specified in the corresponding Campbell pricelist or product manual. Products not manufactured, but that are re-sold by Campbell, 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.
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 4. Quickstart ....................................................................2 4.1 4.
P2546A-L Anemometer 1. Introduction The P2546A is a Class 1 anemometer used in wind energy applications. It primarily provides wind speed resource assessment, and wind turbine power performance monitoring. Wind speed is sensed by a three-cup rotor assembly. Magnets mounted on the shaft cause a switch to close and open two times per revolution. Our dataloggers measure the switch closure and convert the signal to engineering units (mph, m/s, knots).
P2546A-L Anemometer 4. Quickstart 4.1 Step 1 — Mount the Sensor To mount the sensor, do the following. 1. Mount a CM202, CM204, or CM206 crossarm to a tripod or tower. 2. Orient the crossarm north-south, with the CM220 Mount on the north end. 3. Place the 27739 30 inch pole in the bottom of the P2546A. 4. Place the bottom of the 27739 pole in the CM220's u-bolt and tighten the nuts (see FIGURE 4-1). 5. Use a bubble level to ensure that the anemometer is level. 6.
P2546A-L Anemometer 4.2 Step 2 — Use SCWin ShortCut to Program Datalogger and Generate Wiring Diagram The simplest method for programming the datalogger to measure an P2546A is to use Campbell Scientific's SCWin Short Cut Program Generator. 1. Open Short Cut and click on New Program. 2. Select datalogger and enter scan interval.
P2546A-L Anemometer 4 3. Select P2546A and select the right arrow to add it to the list of sensors to be measured then select next. 4. Select the outputs then select finish.
P2546A-L Anemometer 5. 5. Wire according to the wiring diagram generated by SCWin Short Cut. Overview The P2546A-L cup anemometer is a sturdy device that senses wind speed with a three-cup rotor assembly (see FIGURE 5-1). Permanent magnets mounted on the shaft cause a switch to close and open two times per revolution. The switch has no bounce, and is equipped with a special mechanism that reduces the variation in operating time over the frequency range.
P2546A-L Anemometer The P2546A anemometer is manufactured by Windsensor and cabled by Campbell Scientific. Lead length for the P2546A is specified when the sensor is ordered. The P2546A's cable can terminate in: • • 6. Pigtails that connect directly to a Campbell Scientific datalogger (option –PT). Connector that attaches to a prewired enclosure (option –PW). Refer to www.campbellsci.com/prewired-enclosures for more information.
P2546A-L Anemometer 6.1 Nonlinearity: < 0.04 m/s Temperature Influence (-15° to 60°C): < 0.05 m/s Calibration Standard: 6.2 U=A0+B0×f , Where: U=Wind speed in m/s f = Output frequency in Hz A0 = 0.27 m/s B0 = 0.620 m Switching Characteristics Signal Type: potential free contact closure Duty Cycle: 40% to 60% Maximum Switching Voltage: 30 V 7.
P2546A-L Anemometer TABLE 7-1. Connections to Campbell Scientific Dataloggers Pulse Channels Color Wire Label CR800 CR850 CR5000 CR3000 CR1000 White Signal Pulse Brown Signal Reference G Clear Shield G CR510 CR500 CR10X 21X CR7 CR23X Pulse Pulse TABLE 7-2. Connections to Campbell Scientific Dataloggers Control Ports 7.
P2546A-L Anemometer The following table lists the multiplier and offset to obtain meters per second (m/s) when the pulse count instruction is configured to output the result in Hz. TABLE 7-3. Wind Speed Multiplier and Offset Standard Calibration is listed below. Using the MEASNET calibration will give measurements in m/s. MEASNET calibration multiplier and offset will be listed on the MEASNET calibration sheet included with each sensor. Model m/s P2546A Multiplier = 0.6207 Offset = 0.27 7.2.
P2546A-L Anemometer 'Call data tables CallTable Test NextScan EndProg 8. Troubleshooting Symptom: No wind speed 1. Check that the sensor is wired to the pulse channel specified by the pulse count instruction. 2. Verify that the Configuration Code, and Multiplier and Offset parameters for the Pulse Count instruction are correct for the datalogger type. Symptom: Wind speed does not change 1. 9.
P2546A-L Anemometer 10. References IEC 61400 Part 12-1, “Wind turbine generator systems Part 12: Wind Turbine Power Performance Testing”. The following references give detailed information on siting wind speed and wind direction sensors. EPA, 1989: Quality Assurance Handbook for Air Pollution Measurements System, Office of Research and Development, Research Triangle Park, NC, 27711.
P2546A-L Anemometer 12
Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za • cleroux@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA) PO Box 8108 Garbutt Post Shop QLD 4814 AUSTRALIA www.campbellsci.com.au • info@campbellsci.com.au Campbell Scientific do Brazil Ltda.