Campbell CM300 Series User manual

CM300-Series
Mounting Poles
Revision: 04/2020
Copyright © 2008 – 2020
Campbell Scientific, Inc.

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Table of Contents
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1. Overview .................................................................... 1
2. Specifications ............................................................ 2
3. Installation ................................................................. 2
3.1 Tools List .............................................................................................2
3.2 CM300-Series Mounting Pole in Concrete Foundation .......................2
3.3 CM300-Series Mounting Pole with Pedestal J-Bolt Kit.......................3
3.4 CM300-Series Mounting Pole with Pedestal Legs...............................5
3.5 Grounding ............................................................................................7
Figures
1-1. TB4 Rain Gage with CM240 Bracket and CM310 Mounting Pole......1
3-1. CM310 Mounting Pole in Concrete Foundation ..................................3
3-2. Base Assembly .....................................................................................4
3-3. Base Embedded in Concrete ................................................................4
3-4. CM305 Mounting Pole with Pedestal J-Bolt Kit..................................5
3-5. Pedestal Leg Base Showing Incline Holes ...........................................6
3-6. CM300 Mounting Pole with Pedestal Legs..........................................7

1
CM300-Series Mounting Poles
1. Overview
The CM300-series mounting poles provide a stainless steel 1.5 IPS vertical
pole for mounting sensors, enclosures, or other instrumentation. Pole length is
58 cm (23 in), 119 cm (47 in), or 142 cm (56 in) for the CM300, CM305, and
CM310 models, respectively.
Mounting poles are placed directly into a concrete foundation, attached to a
concrete foundation with the Pedestal J-Bolt Kit option, or are self-supporting
with the Pedestal Leg options (FIGURES 1-1, 3-1, 3-4, 3-6). A vinyl cap
prevents precipitation from entering through the top of the pole.
FIGURE 1-1. TB4 Rain Gage with CM240 Bracket and CM310
Mounting Pole
Rain Gage
CM300-Series Pole
Concrete
Foundation
CM240 Bracket
60 cm
(24 in)

CM300-Series Mounting Poles
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2. Specifications
Material: Stainless Steel
Pipe Size: 3.81 cm (1.5 in) IPS
Outer Diameter: 4.8 cm (1.9 in)
Length
CM300:58 cm (23 in)
CM305: 119 cm (47 in)
CM310: 142 cm (56 in)
J-Bolts: 1/2 in x 12 in SS with triple-nuts and washers
(Pedestal J-Bolt Kit option)
CM300 Series Options (FIGURES 1-1, 3-1, 3-4, 3-6):
–NP No Pedestal Base
–PJ Pedestal J-Bolt Kit
–PS Pedestal Short Legs
–PL Pedestal Long Legs
There is a series of holes in the Pedestal Leg Base that determine the leg angle
and pedestal height as shown in TABLE 3-1.
3. Installation
3.1 Tools List
Not all tools listed are needed for each mounting pole option.
(2) 1/2-inch combination wrench
(2) 3/4-inch combination wrench
Large Phillips screwdriver
Torpedo level
Small sledge hammer (for Pedestal Leg option, to drive optional Ground Spikes)
Form materials (for Pedestal J-bolt Kit option, Section 3.3, CM300-Series
Mounting Pole with Pedestal J-Bolt Kit (p. 3))
Optional items (must be ordered separately):
Tripod Grounding Kit for Stainless-Steel CM110-Series Tripods
Ground Spike
3.2 CM300-Series Mounting Pole in Concrete Foundation
For permanent installations, CM300-series poles are installed in a concrete
foundation. Dig a hole 15 to 20 cm (6 to 8 in) in diameter by 60 cm (24 in)
deep (or below frost level). Place the pole in the center of the hole. Fill the hole
with concrete, and plumb the pole with a level.
NOTE

CM300-Series Mounting Poles
3
FIGURE 3-1. CM310 Mounting Pole in Concrete Foundation
3.3 CM300-Series Mounting Pole with Pedestal J-Bolt Kit
A CM300-series pole with the Pedestal J-Bolt Kit option is used for permanent
installations where there is a need to periodically plumb the pole. J-bolts are
installed in a concrete foundation by using the template provided with the kit.
The template positions the J-bolts in the 15.25 cm (6 in) diameter circle
required by the pedestal.
Construct a form 36 cm (14 in) square (inside dimensions) from 38 x 89 mm
(2 x 4 in) precut lumber. Cut two additional 46 cm (18 in) boards from the 38 x
89 mm (2 x 4 in) precut lumber.
Dig a hole 36 x 36 x 60 cm (14 x 14 x 24 in) deep. Depth should exceed typical
frost level. Center, and level the form over the hole.
Vinyl Cap
CM300-Series Pole
Concrete
Foundation
60 cm
(24 in)

CM300-Series Mounting Poles
4
FIGURE 3-2. Base Assembly
Thread two nuts onto each J-bolt, leaving 2.5 cm (1 in) of thread visible
between the nuts and end of the J-bolt. Attach the J-bolts to the template with
another nut. Angle each J-bolt so it points away from the center of the
template.
Place the two 46 cm (18 in) pieces of lumber over the form, leaving room for
the J-bolts. Lower the J-bolts into the hole until the template comes to rest on
the 46 cm (18 in) boards. Optional: Use wood screws to anchor the template to
the two 46 cm (18 in) boards.
Fill the hole and form with concrete.
FIGURE 3-3. Base Embedded in Concrete
Remove the template after the concrete has cured. Leave the two nuts below
the template on each J-bolt in place. Insert the pole into the pedestal, and
tighten the six bolts evenly.
Nut
Template
Nut
2.5 cm (1 in)
J-bolt
46 cm (18 in) Long
36 cm (14 in) Long
60 cm (24 in) Deep Hole
Concrete

CM300-Series Mounting Poles
5
Place a flat washer on each J-bolt, resting it on the two nuts already there.
Place the pedestal over the J-bolts and install a flat washer, split washer, and
nut on each J-bolt — do not tighten the nuts at this time.
Adjust the lower nuts on each J-bolt to plumb the pole. “Lock” the lower nuts
together by using two wrenches. Tighten the upper nuts to secure the pedestal
to the J-bolts.
FIGURE 3-4. CM305 Mounting Pole with Pedestal J-Bolt Kit
3.4 CM300-Series Mounting Pole with Pedestal Legs
A CM300-series pole with a Pedestal Leg option is used for temporary
installations or for applications where a concrete foundation is not an option.
The 58 cm (23 in) Pedestal Legs are adequate for most applications. The 99 cm
(39 in) Pedestal Legs provide additional stability for applications where the
feet cannot be secured (for example, to the surface of a roof), for extended
poles, or for locations with high winds.
Each leg attaches to the pedestal base with an adjustable bolt and quick release
pin. The pedestal base has a set of six holes for each leg. The angle of the legs,
and resultant pedestal height, is determined by which hole the quick release pin
is placed through (see TABLE 3-1).
CM300-Series Pole
Pedestal J-bolt Kit
4 cm (1.5 in)
Nut
Split Washer
Flat Washer
Flat Washer
Nut

CM300-Series Mounting Poles
6
TABLE 3-1. Pedestal Heights and Base Diameters
Hole Position
(See FIGURE 3-5)
Pedestal Height
(inches)
Base Diameter
(inches)
CM350
Pedestal
(23-inch Legs)
A 53 cm (20.8 in) 93 cm (36.5 in)
B 46 cm (19.1 in) 101 cm (39.8 in)
C 45 cm (17.6 in) 111 cm (43.6 in)
D 39 cm (15.5 in) 117 cm (46.1 in)
E 35 cm (13.6 in) 125 cm (49.1 in)
F 23 cm (8.9 in) 133 cm (52.4 in)
CM355
Pedestal
(39-inch Legs)
A 85 cm (33.5 in) 138 cm (54.5 in)
B 78 cm (30.7 in) 154 cm (60.7 in)
C 71 cm (27.9 in) 170 cm (67.0 in)
D 62 cm (24.3 in) 183 cm (71.9 in)
E 53 cm (20.8 in) 195 cm (76.8 in)
F 32 cm (12.5 in) 210 cm (82.8 in)
FIGURE 3-5. Pedestal Leg Base Showing Incline Holes

CM300-Series Mounting Poles
7
Place the pole into the base and tighten the six bolts evenly. For additional
stability, the feet are spiked to the ground using (3) ground spikes, or secured
with user-supplied anchors through the holes in the feet.
FIGURE 3-6. CM300 Mounting Pole with Pedestal Legs
3.5 Grounding
The Tripod Grounding Kit for Stainless-Steel CM110-Series Tripods may be
used to provide an earth ground for the pedestal and associated
instrumentation. Attach the earth and enclosure ground wires to the lug on the
pedestal base as shown in FIGURE 3-6.The tripod grounding kit also includes
a lightning rod for instances where a lightning rod is needed.
CM300-series Pole
Pedestal Legs
Ground Lug

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