Campbell Scientific CM375 User Manual

CM375 Portable 10-Meter Mast

Revision: 7/13

Copyright © 2009-2013

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
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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
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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. Overview......................................................................1

1.1 Specifications .......................................................................................1

1.2 Guy Duckbill Anchor Kits ...................................................................2

2. Tools List (for tripod, mast, enclosures, and

crossarms) ................................................................3

3. CM375 Installation ...................................................... 3

3.1 Site Selection........................................................................................3

3.2 Assembling Mast Sections ...................................................................4

3.3 Lightning Rod Assembly and Mounting Instrumentation..................12

3.4 Anchor Installation.............................................................................13

3.5 Raise, Plumb Mast and Final Cable Tensioning ................................18

4. Maintenance ..............................................................20

Figures

1-1. 21720 tote.............................................................................................1

3-1. Assembled CM375...............................................................................3

3-2. CM375 in opened tote..........................................................................4

3-3. Mast base, sections, and lightning rod kit ............................................4

3-4. Mast Section 1 oriented on base...........................................................5

3-5. Spike installation ..................................................................................6

3-6. Coupler installed in top of mast Section 1 ...........................................6

3-7. Bag containing hardware......................................................................7

3-8. Mast Section 2 and mast Section 3.......................................................7

3-9. Guy ring, mast Section 2 and mast Section 3.......................................8

3-10. 21663 bottom guy kit ...........................................................................8

3-11. Guy cable inserted into guy ring ..........................................................9

3-12. Mast Section 3 and guy ring/collar assembly.......................................9

3-13. Mast Section 4 ready to be installed in mast Section 3 ......................10

3-14. Mast Section 5....................................................................................10

3-15. 21661 guy kit .....................................................................................11

3-16. Mast Section 5 and guy ring/collar assembly.....................................11

3-17. Mast Section 6....................................................................................12

3-18. Lightning rod assembly......................................................................12

3-19. Installed lightning rod ........................................................................13

3-20. Tape measure in slot for South anchor...............................................13

3-21. 19282 duckbill anchor and cable assembly (left). The 25699 has

a threaded rod instead of the cable. The drive rod (right) is used

for both the 19282 and 25699. ........................................................14

3-22. Anchor driven into ground at 45° angle .............................................14

3-23. Locking anchor...................................................................................15

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Table of Contents

3-24. Tape measure in slot for Northeast anchor........................................ 15

3-25. Turnbuckle fastened to guy cable and anchor ................................... 16

3-26. Top and bottom guy cables fastened to an anchor............................. 16

3-27. Rope ratchet assists assembly............................................................ 17

3-28. Adjusting cable through wedge clamp .............................................. 17

3-29. Raising the mast ................................................................................ 18

3-30. Post level ensures vertical mast......................................................... 18

3-31. Adjusting turnbuckles........................................................................ 19

3-32. Guy cables with 100 lb of tension ..................................................... 19

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CM375 Portable 10-Meter Mast

1. Overview

The CM375 is a corrosion-resistant 10 m (30 ft) mast for applications requiring a
tall yet portable instrument mount. It consists of six galvanized pipes, a stainless­steel base, guy cables, 1 m crossarm and mount, and grounding kit. Duckbill
anchor kits (required) and a guy-wire tensioning kit (recommended) are ordered
separately. All of the components fit inside a 2 m (80 in) bag allowing the
CM375 to be carried from site to site (see FIGURE 1-1).

FIGURE 1-1. 21720 tote

1.1 Specifications

Weight: 30 kg (66 lb)

Mast: 9.2 m (30 ft) total length; consists of five

Main Mast Diameter: 48.26 mm (1.9 in)

Top Section Mast Diameter: 44.2 mm (1.74 in)

Base Radius: 6 m (20 ft) to each of three guy points, 120

Guy Configuration: Three guy cables at two levels; guyed at 3.6 m

Recommended Guy
Wire Pretension: 100 lb each; check and adjust guy wire tension

1.82 m (6 ft) and one 1 m (39 in) sections

degrees apart

(12 ft) and at 7.2 m (24 ft)

at least once a month, and after wind gusts
exceeding 50 mph

Maximum Weight of
Mounted Equipment: 34 kg (75 lb)

1

CM375 Portable 10-Meter Mast

Maximum Allowable
Wind Gust

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: 136 kmh–1 (85 mph)

The wind gust value assumes:

• Proper installation

• Proper anchoring:

o Adequate soil (guy anchors/base support)
o Guy anchors at 20-ft from base with 120 degrees of separation
o Proper guy tension (100 lb each)

• No ice buildup

• Standard air quality or wind assessment configuration (see Table

below)

1.2 Guy Duckbill Anchor Kits

A choice of duckbill anchor kits is offered for the CM375. The 19282 Guy
Duckbill Standard Anchor Kit is adequate for most sandy and loamy soils.
Clay soils and other soils with higher corrosive properties will require the
25699 Guy Duckbill Heavy Duty Anchor Kit. These corrosive soils, also
known as aggressive soils, have one or more of the following properties:

• High electrical conductivity (>0.33 dS m

• High acidity (pH <5)

• High chloride concentration (>1000 ppm)

• High sulfate concentration (>500 ppm)

• Poor aeration

Both the 19282 and 25699 have one drive rod. The 19282 also has four
duckbill anchors with a cable attached to each of them; at the end of the cable
is a loop for connecting the guy wires. The 25699 has a threaded rod attached
to each of the four duckbill anchors instead of the cable; at the end of the
threaded rod is a metal ring for connecting the guy wires.

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The amount of wind gust that this mount can withstand is affected by quality

of anchoring and installation, guy wire tension, soil type, guy angle, and the
number, type, and location of instruments fastened to the CM375.

–1

)

2

CM375 Portable 10-Meter Mast

2. Tools List (for tripod, mast, enclosures, and crossarms)

1/2-in. and 7/16-in. open end wrenches
adjustable wrench
Phillips head screw drivers (medium, small)
Straight bit screwdrivers (large, medium)
12-in. torpedo level
side-cut pliers
pencil
tape measure
compass and site declination angle
shovel
sledge hammer (for driving ground rod and stakes)
step ladder

3. CM375 Installation

3.1 Site Selection

Select a site free from overhead power lines, and 30 m (100 ft) in any direction
from trees, buildings, and other obstructions (see FIGURE 3-1).

FIGURE 3-1. Assembled CM375

3