Campbell Scientific WXT520 User Manual

WXT520 Weather Transmitter

Revision: 8/12

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 (435) 227-9000. 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 repair@campbellsci.com or faxed to (435) 227-9106. 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.

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1. Introduction.................................................................1

2. Cautionary Statements...............................................1

3. Initial Inspection .........................................................1

4. Overview......................................................................1

4.1 Wind Speed and Direction ...................................................................1

4.2 Precipitation .........................................................................................1

4.3 Barometric Pressure, Temperature, and Relative Humidity.................2

5. Specifications .............................................................2

5.1 Wind Speed..........................................................................................2

5.2 Wind Direction.....................................................................................2

5.3 Precipitation .........................................................................................2

5.4 Barometric Pressure .............................................................................2

5.5 Air Temperature...................................................................................3

5.6 Relative Humidity ................................................................................3

5.7 Assembly..............................................................................................3

6. Installation...................................................................3

6.1 Mounting to a Campbell Scientific Crossarm ......................................3

6.2 IP66 Mounting Device .........................................................................3

6.3 Bird Spike Kit ......................................................................................4

6.4 Wiring Table ........................................................................................5

6.5 Commands ...........................................................................................6

6.6 Programming........................................................................................6

6.6.1 CRBasic ........................................................................................6

6.6.1.1 Example CR1000 Program.................................................7

6.6.1.2 Example CR200(X) Program .............................................8

6.6.2 Edlog Programming ......................................................................9

6.6.2.1 CR10X Program.................................................................9

Appendix

Configuring the WXT520 ........................................ A-1

Table of Contents

Figures

6-1. Optional WXT520 IP66 Mounting Kit................................................ 4

6-2. Optional bird spike device................................................................... 5

A-1. Connection Setup screen ................................................................. A-1

A-2. Device Settings screen..................................................................... A-2

A-3. Sensor Settings screen ..................................................................... A-3

A-4. Message Settings screen .................................................................. A-3

Tables

6-1. Connections to Campbell Scientific Dataloggers ................................ 5

6-2. SDI-12 Commands.............................................................................. 6

WXT520 Weather Transmitter

1. Introduction

The WXT520 Weather Transmitter, manufactured by Vaisala, measures wind speed and direction, precipitation, barometric pressure, temperature, and relative humidity—all in a single device that has no moving parts. The WXT520’s SDI-12 signal can be measured by any of our SDI-12 equipped dataloggers. The WXT520 is about the size of our larger Gill radiation shield, making it ideal for use with our CR200(X)-series dataloggers in applications requiring quick, short-term deployment. However, the WXT520 is not intended for weather stations that require research-grade performance.

Before installing the sensor, please study

• Section 2, Cautionary Statements

• Section 3, Initial Inspection

2. Cautionary Statements

• Although the WXT20 is rugged, it should be handled as precision

scientific instrument.

3. Initial Inspection

• Upon receipt of the WXT20, inspect the packaging and contents for

damage. File damage claims with the shipping company.

4. Overview

4.1 Wind Speed and Direction

The WXT520's wind sensor consists of three equally spaced transducers that produce ultrasonic signals. Wind speed and direction are determined by measuring the time it takes for the ultrasonic signal of one transducer to travel to the other transducers. Wind direction is not calculated when the wind speed drops below 0.05 m/s. In this case, the last calculated direction output remains until wind speed increases. The computed wind speeds are independent of altitude, temperature, and humidity. The WXT520 is preconfigured to provide the minimum, average, and maximum values for both wind speed and direction. Default wind speed units are m/s.

4.2 Precipitation

The WXT520 uses the RAINCAP® Sensor to measure accumulated rainfall, rain intensity, and rain duration. Precipitation is measured one raindrop at a time. Whenever a raindrop hits the precipitation sensor, an electrical signal is produced that is proportional to the volume of the drop.

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