Campbell Scientific 024A-L User Manual

Model 024A Met One

Wind Direction Sensor

Revision: 10/12

Copyright © 1989-2012

Campbell Scientific, Inc.

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. Batteries, fine-wire thermocouples, desiccant, and other
consumables have no warranty. Campbell's obligation under this warranty is
limited to repairing or replacing (at Campbell's option) defective products,
which shall be the sole and exclusive remedy under this warranty. The
customer shall assume all costs of removing, reinstalling, and shipping
defective products to Campbell. Campbell will return such products by surface
carrier prepaid within the continental United States of America. To all other
locations, Campbell will return such products best way CIP (Port of Entry)
INCOTERM® 2010, prepaid. This warranty shall not apply to any products
which have been subjected to modification, misuse, neglect, improper service,
accidents of nature, or shipping damage. This warranty is in lieu of all other
warranties, expressed or implied. The warranty for installation services
performed by Campbell such as programming to customer specifications,
electrical connections to products manufactured by Campbell, and product
specific training, is part of Campbell’s product warranty. CAMPBELL
EXPRESSLY DISCLAIMS AND EXCLUDES ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. Campbell is not liable for any special, indirect,
incidental, and/or consequential damages.”

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 [phone]. After an applications engineer
determines the nature of the problem, an RMA number will be issued. Please
write this number clearly on the outside of the shipping container. Campbell
Scientific's shipping address is:

CAMPBELL SCIENTIFIC, INC.
RMA#_____
815 West 1800 North
Logan, Utah 84321-1784

For all returns, the customer must fill out a "Statement of Product Cleanliness
and Decontamination" form and comply with the requirements specified in it.
The form is available from our web site at www.campbellsci.com/repair. A
completed form must be either emailed to [e-mail] or faxed to
[phone]. Campbell Scientific is unable to process any returns until we
receive this form. If the form is not received within three days of product
receipt or is incomplete, the product will be returned to the customer at the
customer's expense. Campbell Scientific reserves the right to refuse service on
products that were exposed to contaminants that may cause health or safety
concerns for our employees.

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 Step 1 — Mount the Sensor .................................................................2

4.2 Step 2 — Use SCWin Short Cut to Program Datalogger and

Generate Wiring Diagram.................................................................4

5. Overview......................................................................6

6. Specifications .............................................................7

7. Installation...................................................................7

7.1 Siting ....................................................................................................7

7.2 Mounting Options ................................................................................8

7.3 Wiring ..................................................................................................9

7.4 Programming........................................................................................9

7.4.1 Datalogger Instruction...................................................................9

7.4.2 Calibration and Orientation.........................................................10

7.4.3 Example Programs......................................................................11

8. Maintenance ..............................................................13

8.1 6 to 12 Month Periodic Service *.......................................................13

8.2 24 to 36 Month Service *...................................................................13

9. References ................................................................17

Appendix

Wind Direction Sensor Orientation ....................... A-1

A.

A.1 Determining True North and Sensor Orientation ............................ A-1

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Table of Contents

Figures

Tables

4-1. Bushing installation on 024A sensor ................................................... 2

4-2. The 024A mounted to a crossarm via the 17953 NU-RAIL................ 3

7-1. CM220 mount attached to a crossarm................................................. 8

7-2. CM216 mount...................................................................................... 8

7-3. Schematic of 024A Wind Direction Sensor......................................... 9

8-1. Cable diagram.................................................................................... 14

8-2. Parts diagram..................................................................................... 15

A-1. Magnetic declination for the contiguous United States (2004)........ A-2

A-2. Declination angles east of True North are subtracted from 0 to

get True North.............................................................................. A-3

A-3. Declination angles west of True North are added to 0 to get

True North ................................................................................... A-3

5-1. Recommended Cable Lengths............................................................. 6

7-1. Connections to Campbell Scientific Dataloggers ................................ 9

7-2. Parameters for Wind Direction.......................................................... 10

8-1. Met-One Parts List Reproduced by Campbell Scientific, Inc............ 16

ii

024A Met-One Wind Direction Sensor

1. Introduction

The 024A is a wind vane manufactured by Met One. It measures wind
direction only and is traditionally used in tandem with Met One’s 014A Wind
Speed Sensor.

Before installing the 024A, please study

• Section 2, Cautionary Statements

• Section 3, Initial Inspection

• Section 4, Quickstart

2. Cautionary Statements

• The 024A is a precision instrument. Please handle it with care.

• If the 024A is to be installed at heights over 6 feet, be familiar with tower

safety and follow safe tower climbing procedures.

• Danger—Use extreme care when working near overhead electrical wires.

Check for overhead wires before mounting the 024A or before raising a
tower.

• The black outer jacket of the cable is Santoprene® rubber. This

compound was chosen for its resistance to temperature extremes, moisture,
and UV degradation. However, this jacket will support combustion in air.
It is rated as slow burning when tested according to U.L. 94 H.B. and will
pass FMVSS302. Local fire codes may preclude its use inside buildings.

3. Initial Inspection

• Upon receipt of the 024A, inspect the packaging and contents for damage.

File damage claims with the shipping company. Immediately check
package contents against the shipping documentation. Contact Campbell
Scientific about any discrepancies.

• The model number and cable length are printed on a label at the

connection end of the cable. Check this information against the shipping
documents to ensure the expected product and cable length are received.

1

024A Met-One Wind Direction Sensor

4. Quickstart

4.1 Step 1 — Mount the Sensor

Please review Section 7, Installation, for siting and other guidelines.

Install the 024A using:

• CM220 Right-Angle Mounting Kit, or

• 17953 1 x 1 inch NURAIL Crossover Fitting

1. Remove the Allen hex screw in the lower part of the sensor housing (see

FIGURE 4-1).

2. Insert the 024A in the mounting bushing (see FIGURE 4-1).

3. Tighten the screw in the bushing onto the sensor housing (see FIGURE

4-1).

2

FIGURE 4-1. Bushing installation on 024A sensor

4. Mount a CM202, CM204, or CM206 crossarm to a tripod or tower.

5. Orient the crossarm north-south, with the CM220 or 17953 NU-RAIL on

the north end. Appendix A contains detailed information on determining
True North using a compass and the magnetic declination for the site.

6. Insert the sensor in the CM220 or NU-RAIL fitting (see FIGURE 4-2).

024A Met-One Wind Direction Sensor

7. Align the sensor so that the counter weight points to True South and

tighten the U-bolts on the CM220 or tighten the set screws on the NU­RAIL fitting.

8. Connect the cable assembly to the sensor receptacle.

9. Route the sensor cable along the underside of the crossarm to the tripod or

tower, and to the instrument enclosure.

10. Secure the cable to the crossarm and tripod or tower using cable ties.

FIGURE 4-2. The 024A mounted to a crossarm via the 17953 NU-RAIL

3