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Campbell UT20 Product Manual

Universal towers
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UT20 and
UT30
Universal Towers
Revision: 8/18
Copyright © 1993 – 2018
Campbell Scientific, Inc.

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Summary of Contents for Campbell UT20

  • Page 1 UT20 and UT30 Universal Towers Revision: 8/18 Copyright © 1993 – 2018 Campbell Scientific, Inc.

  • Page 2: Limited Warranty

    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.
  • Page 3 Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA) number, contact CAMPBELL SCIENTIFIC, INC., phone (435) 227-9000. Please write the issued RMA number clearly on the outside of the shipping container. Campbell Scientific’s shipping address is: CAMPBELL SCIENTIFIC, INC.
  • Page 4 Periodically (at least yearly) check electrical ground connections. • WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC.

  • Page 5: Table Of Contents

    Solar Radiation ..................5 Soil Temperature .................. 5 Siting References ................. 5 5. Overview ..............6 6. Specifications ............. 7 7. UT20/UT30 Tower Installation ........8 Installing the UT20/UT30 ..............8 7.1.1 Base and Guy Anchor Layout ............8 7.1.2 Tower Base Installation ..............
  • Page 6 7-10. UTDUK duckbill in load-lock position ..........14 7-11. Guy wire attached to tower ............... 15 7-12. UT20/30 lightning rod and mounting bracket ........16 7-13. Guy wire/turnbuckle attached to the UTEYE anchor ......16 7-14. Ground rod and clamp ............... 17 7-15.

  • Page 7: Introduction

    UT20 and UT30 Universal Towers Introduction The UT20 and UT30 are durable, lightweight instrument towers used for a variety of applications. They support a 6 m (20 ft) or 9 m (30 ft) measurement height for wind sensors as well as sturdy attachment points for antennas, solar panels, environmental enclosures, radiation shields, and crossarms.

  • Page 8: Initial Inspection

    Locate a suitable site for the tower (Section 4, Siting and Exposure (p. 3) • Prepare the tower base (Section 7, UT20/UT30 Tower Installation (p. 8) Install sensors to be mounted above a height of 3 m. Raise the tower (Section 7, UT20/UT30 Tower Installation (p.

  • Page 9: Siting And Exposure

    UT20 and UT30 Universal Towers Siting and Exposure DANGER If any part of the weather station comes into contact with power lines, death or serious injury could occur. Contact local utilities for the location of buried utility lines before digging or driving ground rods.

  • Page 10: Temperature And Relative Humidity

    (EPA, AASC) the height of the obstruction. Position the height of the opening as low as possible, but high enough to avoid splashing from the ground. Wind shields, such as Campbell Scientific’s 260-953 Alter-Type Rain Gage Wind Screen, are recommended for open areas.

  • Page 11: Solar Radiation

    Reflective surfaces and sources of artificial radiation must be avoided. Heated pyranometers, such as the SP230-L from Campbell Scientific, are available for use in areas where snow, frost, or dew may accumulate. The height the sensor is mounted is not critical.

  • Page 12: Overview

    UT20 and UT30 Universal Towers Overview The UT20 and UT30 towers provide a versatile mount for sensors, antennas, solar panels, environmental enclosures, radiation shields, and mounting crossarms. Its 6 m (20 ft) or 9 m (30 ft) height allows for wind measurements at those levels.

  • Page 13: Specifications

    UT20 and UT30 Universal Towers Specifications UT20 UT30 Measurement Height 6 m (20 ft) 10 m (30 ft) Shipping Weight 23 kg (50 lb) 29 kg (65 lb) Material Hardened drawn 6063-T832 Aluminum Top 3 m Tube OD (outside diameter) 2.5 cm (1 in)

  • Page 14: Ut20/Ut30 Tower Installation

    Drive a stake where the base of the tower will be located. Attach a line to the stake and scribe a circle with an 11.5 ft radius for the UT20 or a 17 ft radius for the UT30. The tower will be positioned so two legs will be parallel to the equator as well as closest to the equator.

  • Page 15: Tower Base Installation

    29.5 ft from the first anchor to the scribed line on either side of the base stake (FIGURE 7-2). When using a UT20 on level ground, lay out the two remaining anchor locations 20 ft from the first anchor to the scribed line on either side of the base stake.

  • Page 16: B18 Base Installation

    UT20 and UT30 Universal Towers 7.1.2.1 B18 Base installation Dig a hole 36 inches square and 48 inches deep where the tower base will be located. FIGURE shows these dimensions. FIGURE 7-3. Concrete base dimensions Optional: construct a concrete form out of 2-inch x 4-inch lumber, 36 inches square (inside dimensions).

  • Page 17: Rfm18 Base Installation

    UT20 and UT30 Universal Towers Center the bottom tower section with the base attached in the hole. Orient the tower so one side is aimed toward the equator, but the angle of the hinges will allow the tower to tilt away from the equator at an angle.

  • Page 18: Rfm18 Base Dimensions

    UT20 and UT30 Universal Towers FIGURE 7-6. RFM18 base dimensions Attach the bottom section of the tower to the RFM18 base by using one 9/16-inch bolt per leg (FIGURE 7-7). Position the base over the anchor holes. Secure the base to the anchors by using appropriate hardware (user supplied).

  • Page 19: Guy Anchor Installation

    UT20 and UT30 Universal Towers RFM18 Mounting Hole (4) places FIGURE 7-7. RFM18 flat roof mounting base 7.1.3 Guy Anchor Installation There are two types of anchors for the tower guy wires: the UTEYE eye bolts are poured in concrete; the UTDUK duckbill anchors are driven into the soil.

  • Page 20: Utdk Duckbill Guy Anchor Being Driven Into The Ground

    UT20 and UT30 Universal Towers the guy wires (FIGURE 7-9). Insert the steel drive bar into the anchor body and drive the anchor into the ground by using a fence post driver or sledgehammer until only the top half of the loop remains above the ground.

  • Page 21: Tower Assembly

    UT20 and UT30 Universal Towers 7.1.4 Tower Assembly After installing the base and bottom tower section (Section 7.1.3, Guy ), remove the bolt from the rear tower leg, and Anchor Installation (p. 13) loosen the bolt in the side legs so the bottom tower section is free to hinge.

  • Page 22: Ut20/30 Lightning Rod And Mounting Bracket

    UT20 and UT30 Universal Towers FIGURE 7-12. UT20/30 lightning rod and mounting bracket “Walk” the tower to its upright position and install the remaining bolts in the tower base. Attach the guy wires to the anchors (FIGURE 7-13). Unscrew the jaw and eye bolts until 1 inch of thread extends through the turnbuckle body.

  • Page 23: Utgnd Tower Grounding Kit

    UT20 and UT30 Universal Towers 7.1.5 UTGND Tower Grounding Kit Drive the ground rod close to the tower (FIGURE 7-15) using a fence post driver or sledgehammer. Drive the rod at an angle if an impenetrable hardpan layer exists. In hard clay soils, a gallon milk jug of water can be used to “prime”...

  • Page 24: Attaching The Lightning Rod

    UT20 and UT30 Universal Towers FIGURE 7-15. Tower grounding clamp 7.1.6 Attaching the Lightning Rod Install the lightning rod to the mast as shown in FIGURE 7-16. Loosen the two screws on the lightning rod mounting bracket. Position the mounting bracket 2 inches down from the top of the mast and tighten both screws evenly.

  • Page 25: Crossarms And Mounting Brackets

    Campbell Scientific provides a variety of lengths in aluminum or stainless steel. TABLE shows the different lengths available.

  • Page 26: Cmb200 Crossarm Brace Kit

    7.2.2 CMB200 Crossarm Brace Kit The CMB200 Crossarm Brace Kit (FIGURE 7-18) is designed to provide additional stability to crossarms mounted on Campbell Scientific tripods and towers. It provides additional support for crossarms with heavier sensor loads, and added stability in high winds.

  • Page 27: Assembly

    UT20 and UT30 Universal Towers FIGURE 7-19. CMB200 components 7.2.2.2 Assembly Consult FIGURE 7-20 and TABLE to determine which brackets are needed at either end of the brace to attach it to the crossarm and tower. The figure also indicates what orientation is needed when the small bracket is used.

  • Page 28: Bracket Requirements

    UT20 and UT30 Universal Towers FIGURE 7-20. Bracket selection TABLE 7-2. Bracket Requirements Mast/Crossarm/ Example Small Bracket Tower Diameter Mast/Crossarm/Tower Brackets Needed Orientation UT10/20/30 Tower Leg (1) Small Bracket Angled toward 1.00 in (excludes bottom section (1) Medium Bracket mast/tripod...
  • Page 29 Campbell Scientific Worldwide Offices Australia Germany Location: Garbutt, QLD Australia Location: Bremen, Germany Email: Email: info@campbellsci.com.au info@campbellsci.de Website: www.campbellsci.com.au Website: www.campbellsci.de Brazil South Africa Location: São Paulo, SP Brazil Location: Stellenbosch, South Africa Email: andread@campbellsci.com.br Email: sales@csafrica.co.za Website: Website: www.campbellsci.com.br www.campbellscientific.co.za...

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Ut30

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