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Campbell UT20 Product Manual

Universal towers
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Revision: 03/2020
Copyright © 1993 – 2020
Campbell Scientific, Inc.

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Summary of Contents for Campbell UT20

  • Page 1 Revision: 03/2020 Copyright © 1993 – 2020 Campbell Scientific, Inc.

  • Page 2: Table Of Contents

    Table of contents 1. Introduction 2. Precautions 2.1 Site selection 2.2 Tower mounting 2.3 Tower installation 3. Initial inspection 3.1 Indoors 3.2 Outdoors 3.3 Tools required 4. Siting and exposure 4.1 Wind speed and direction 4.2 Temperature and relative humidity 4.3 Precipitation 4.4 Solar radiation 4.5 Soil temperature...
  • Page 3 7.1.6 Attaching the lightning rod 7.2 Crossarms and mounting brackets 7.2.1 CM202, CM203, CM204, CM206 Crossarms 7.2.2 CM230, CM230XL adjustable angle mounting kits 7.2.3 CMB200 crossarm brace kit 7.2.3.1 Components 7.2.3.2 Assembly Appendix A. UTBASE paper template Paper template, page 1 Paper template, page 2 Paper template, page 3 Table of Contents - ii...

  • Page 4: Introduction

    1. 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 5: Tower Installation

    Inspect the shipping cartons for visible damage. Report any damage to the shipping company. Open all shipping cartons. Check the contents of the cartons against the invoice. Contact Campbell Scientific immediately if any parts are missing. 3.2 Outdoors Locate a suitable site for the tower (Siting and exposure (p.

  • Page 6: Tools Required

    (p. 9)). Install sensors to be mounted below a height of 3 m. 3.3 Tools required Tools required to install and maintain a Campbell Scientific tower: Shovel Rake Open end wrenches: 3/8 in, 7/16 in, 1/2 in, (2) 9/16 in...

  • Page 7: Wind Speed And Direction

    30 m (EPA ) from paved areas. Sensors must be protected from thermal radiation and adequately ventilated. UT20 and UT30 Universal Towers...

  • Page 8: Precipitation

    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 260 953 Alter-Type Rain Gage Wind Screen, are recommended for open areas.

  • Page 9: Soil Temperature

    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.
  • Page 10 FIGURE 5-1. UT20 tower UT20 and UT30 Universal Towers...

  • Page 11: Specifications

    177 km/h (110 mph) for gusts (UTBASE base, unguyed) recommendations 177 km/h (110 mph) for gusts (RBM18 base with/UTGUY) (note 2) Notes: 1. The concrete pad requirements assume heavy soil. Light, shifting, or sandy soils require a bigger concrete pad. UT20 and UT30 Universal Towers...

  • Page 12: Tower Installation

    The tower provides a support structure for mounting the weather station components. FIGURE 7- (p. 9) shows a typical tower equipped with an instrumentation enclosure, meteorological sensors, and a solar panel. FIGURE 7-1. Weather tower UT20 and UT30 Universal Towers...

  • Page 13: Base And Guy Anchor Layout

    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 14: Tower Base Installation

    For the wood frames, the following parts are needed: 38 x 89 mm (2 x 4) lumber of the following lengths: Two 152.4 cm (60 in) Two 91.4 cm (36 in) One 109.2 cm (43 in) Two 25.4 cm (10 in) UT20 and UT30 Universal Towers...
  • Page 15 (FIGURE 7-4 (p. 13)). Level the form using a torpedo level and secure it in position by driving 65 mm (2 1/2 in) screws through the stakes and into the form. FIGURE 7-3. Concrete form and template frame dimensions UT20 and UT30 Universal Towers...
  • Page 16 3. Assemble the template and anchor bolts as shown in FIGURE 7-5 (p. 14). If the metal template was not purchased, refer to UTBASE paper template (p. 37) for instructions on printing a paper pattern used to make a wooden template. UT20 and UT30 Universal Towers...
  • Page 17 FIGURE 7-6 (p. 15). This placement optimizes the position of the anchor bolts inside the concrete. Anchor the template frame to the concrete form with 65 mm (2 1/2 in) screws. UT20 and UT30 Universal Towers...
  • Page 18 (p. 16)). Adjust the bolt position in the template until the correct clearance is set. Wrap the visible threads at the top of each anchor bolt with masking tape to keep the threads clean as the concrete is poured. UT20 and UT30 Universal Towers...
  • Page 19 6. Fill the hole with concrete (FIGURE 7-8 (p. 17)). Remove the masking tape from the anchor bolt threads once the concrete has been leveled. Allow three to four days for the concrete to cure. UT20 and UT30 Universal Towers...
  • Page 20 (p. 18). Leg 1 will be one of the two legs along the side aimed at the equator. This positioning allows a solar panel to be attached to two tower legs while providing easy access to sensors at the top of the tower. UT20 and UT30 Universal Towers...
  • Page 21 FIGURE 7-9. Clevis angle for proper tilt direction 9. Place a universal connecting tube inside each clevis and attach it with two 3/8-16 x 2.75- inch bolts and locknuts. Finger-tighten the nuts (FIGURE 7-10 (p. 19)). UT20 and UT30 Universal Towers...
  • Page 22 Check the tower section again to see if it is plum. If not, repeat steps a through c to refine the tower position as needed. e. Reattach the 3/8-16 x 2.75-inch bolts and locknuts on legs 2 and 3 (FIGURE 7-10 19)). UT20 and UT30 Universal Towers...

  • Page 23: Rfm18 Base Installation

    (p. 21)). Position the base over the anchor holes. Secure the base to the anchors by using appropriate hardware (user supplied). Check the tower for plumb and shim the RFM18, if necessary, before fully tightening the bolts. UT20 and UT30 Universal Towers...

  • Page 24: Guy Anchor Installation

    (inside dimensions) for each hole. Center the forms over the holes and level them by using a carpenter’s level and stakes. 3. Fill the holes with concrete and install the eyebolts as shown in FIGURE 7-13 (p. 22). UT20 and UT30 Universal Towers...

  • Page 25: Utduk Duckbill Guy Anchor

    (p. 23)). 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. UT20 and UT30 Universal Towers...
  • Page 26 Failure to install and lock the anchor at the correct angle will result in the anchor cable cutting through the soil until the angles equalize, causing slack in the guy wires. FIGURE 7-15. UTDUK duckbill in load-lock position UT20 and UT30 Universal Towers...

  • Page 27: Tower Assembly

    (FIGURE 7-17 (p. 25)). Cut the 120 ft piece of guy wire into three pieces; lengths will vary with slope. Attach the guy wires to the tower by using two U-bolts for each guy wire. UT20 and UT30 Universal Towers...
  • Page 28 3. The mounting brackets, sensors, and lightning rod (FIGURE 7-18 (p. 25)) that attach to the upper tower sections are most easily attached while the tower is lying on the ground. FIGURE 7-18. UT20 and UT30 lightning rod and mounting bracket UT20 and UT30 Universal Towers...

  • Page 29: Utgnd Tower Grounding Kit

    1. Drive the ground rod close to the tower (FIGURE 7-21 (p. 28)) using a fence post driver or sledgehammer. Drive the rod at an angle if an impenetrable hardpan layer exists. In hard UT20 and UT30 Universal Towers...
  • Page 30 4 AWG wire and the 12 AWG enclosure ground wire into the hole behind the set screw and tighten the set screw. Route the green wire to where the enclosure will be installed. UT20 and UT30 Universal Towers...

  • Page 31: Attaching The Lightning Rod

    (p. 29). 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. Make sure the lightning rod set screw is tight. UT20 and UT30 Universal Towers...

  • Page 32: Crossarms And Mounting Brackets

    Mounting sensors on a crossarm allows the sensor to be moved away from the midline of the tower, reducing the effects of the mount on the sensor measurement. Campbell Scientific provides a variety of lengths in aluminum or stainless steel. Table 7-1 (p. 30) shows the different lengths available.

  • Page 33: Cm230, Cm230Xl Adjustable Angle Mounting Kits

    The CM230 is used when mounting the component close to the mast or tower while the CM230XL extends the component away from the mast or tower. UT20 and UT30 Universal Towers...
  • Page 34 (p. 32) is an exploded diagram of the CM230XL showing all the included hardware as well as the curved slots at the end of the bracket used to adjust the angle of the antenna or sensor. UT20 and UT30 Universal Towers...

  • Page 35: Cmb200 Crossarm Brace Kit

    (FIGURE 7-26 (p. 33)) 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. UT20 and UT30 Universal Towers...

  • Page 36: Components

    The CMB200 ships with the following components (FIGURE 7-27 (p. 34)): (1) brace arm (2) small bracket (2) medium bracket (2) large bracket (4) 1/4-20 x 1-inch bolt (8) 1/4 flat washer (4) 1/4 lock washer (4) 1/4-20 nut UT20 and UT30 Universal Towers...

  • Page 37: Assembly

    4. Adjust the position of the brace arm as needed. 5. Fully tighten the two bolts directly connected to the brace arm, and then tighten the remaining two bolts to clamp the brace arm to the tower. UT20 and UT30 Universal Towers...
  • Page 38 FIGURE 7-28. Bracket selection UT20 and UT30 Universal Towers...
  • Page 39 UT20/30 tower mast, (1) small bracket Angled away from 1.25 in or 1.31 in UT20/30 tower leg (1) medium bracket mast/tripod (bottom section only) CM110/106B tripod 1.90 in (2) large bracket mast, UT10 tower mast UT20 and UT30 Universal Towers...

  • Page 40: Appendix A. Utbase Paper Template

    8. Attach the wooden template to the template frame in place of the metal template as shown in step 4 in UTBASE base installation (p. 11) and continue the UTBASE assembly instructions from that point. UT20 and UT30 Universal Towers...
  • Page 41 Page 1 (of 3) 3-inch reference 14.7 “...
  • Page 42 UTBASE Page 2 (of 3) 3-inch reference 43.2 cm (17 in)
  • Page 43 UTBASE Page 3 (of 3) 3-inch reference...

  • Page 44: Limited Warranty

    See Product Details on the Ordering Information pages at www.campbellsci.com. Other manufacturer's products, that are resold by Campbell Scientific, are warranted only to the limits extended by the original manufacturer.
  • Page 45 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.
  • Page 46 Do not recharge, disassemble, heat above 100 °C (212 °F), solder directly to the cell, incinerate, or expose contents to water. Dispose of spent batteries properly. 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...
  • Page 47 Australia France Thailand Location: Garbutt, QLD Australia Location: Vincennes, France Location: Bangkok, Thailand Phone: 61.7.4401.7700 Phone: 0033.0.1.56.45.15.20 Phone: 66.2.719.3399 Email: info@campbellsci.com.au Email: info@campbellsci.fr Email: info@campbellsci.asia Website: www.campbellsci.com.au Website: www.campbellsci.fr Website: www.campbellsci.asia Brazil Germany Location: São Paulo, SP Brazil Location: Bremen, Germany Location: Shepshed, Loughborough, UK Phone:...

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Ut30

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