CM106 Tripod
Revision: 3/12
Copyright © 2005-2012
Campbell Scientific, Inc.
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CM106 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. General .........................................................................1
2. Specifications ..............................................................2
3. Tools List (for tripod, mast, enclosures, and
crossarms) .................................................................2
4. Tripod Components..................................................... 3
5. Tripod Installation........................................................4
5.1 Tripod Base...............................................................................................4
5.1.1 Mounting on a Relatively Flat Area................................................4
5.1.2 Mounting on an Incline...................................................................5
5.2 Mast ..........................................................................................................6
5.3 Installing the Optional Guy Kit ................................................................8
5.4 Staking the Tripod Feet ..........................................................................10
5.5 Tripod Grounding...................................................................................11
5.6 Crossarm Attachment .............................................................................13
5.7 Enclosure Attachment.............................................................................13
5.7.1 Enclosure Mounting to Tripod Mast.............................................13
5.7.2 Enclosure Mounting to Tripod Leg...............................................14
6. Mounting Brackets ....................................................16
6.1 CM210 Crossarm Mounting Kit.............................................................16
6.2 CM216 Mast Mounting Kit ....................................................................17
6.3 CM220 Right Angle Mounting Kit.........................................................18
6.4 CM225 and 18098 Pyranometer Mounting Stand ..................................19
6.5 CM230 Adjustable Angle Mounting Kit ................................................20
6.6 CM235 Magnetic Mounting Stand .........................................................21
6.7 RM Young Gill Radiation Shields..........................................................22
List of Figures
1-1. Typical trip-based weather station...........................................................1
4-1. Tripod components..................................................................................3
5-1. Tripod leg, slide collar components ........................................................4
5-2. Comparison of one leg pointing downhill (right) versus two legs
pointing downhill ...............................................................................5
5-3. Tripod mast and insert.............................................................................6
5-4. Mast attachment to tripod base................................................................7
5-5. Guy collar................................................................................................8
i
CM106 Table of Contents
5-6. Leg attachment ....................................................................................... 9
5-7. Staking the tripod feet........................................................................... 10
5-8. Ground rod and clamp .......................................................................... 11
5-9. Lightning rod and tripod grounding lug ............................................... 12
5-10. CM204 Crossarm................................................................................ 13
5-11. Enclosure with the –MM Bracket....................................................... 14
5-12. Enclosure with the –LM Bracket........................................................ 15
6-1. CM210 Crossarm Mounting Kit (shown with user-supplied pipe) ...... 16
6-2. CM216 Mast Mounting Kit .................................................................. 17
6-3. CM220 Right Angle Mounting Kit....................................................... 18
6-4. CM225 Pyranometer Mounting Stand.................................................. 19
6-5. CM230 Adjustable Angle Mounting Kit .............................................. 20
6-6. CM235 Magnetic Mounting Stand ....................................................... 21
6-7. RM Young Gill Radiation Shield ......................................................... 22
ii
CM106 Tripod
1. General
The CM106 is a general purpose tripod that can be used for mounting sensors,
solar panels, antennas, and instrument enclosures. The CM106 is constructed
from galvanized steel, with individually adjustable legs that allow installation
over uneven terrain. Height of the mast is 7 ft (2.1 m), or 10 ft (3 m) with the
mast extension.
The CM106 includes lightning and grounding rods, grounding cables, UV
resistant cable ties, and stakes for securing the tripod feet to the ground. An
optional guy kit is recommended for sites that experience high wind speeds
(see Section 2, Allowable Wind Speed Specifications). Instrument enclosures
can be purchased with mounting brackets that attach to either the mast or leg
section as shown in Section 5.7.
The CM106 can be used for a variety of applications. For meteorological
stations, sensors are mounted to the tripod using mounting brackets appropriate
for the model of sensor. For non-meteorological applications the tripod can be
used to mount instrument enclosures, solar panels, junction boxes, or antennas.
FIGURE 1-1. Typical tripod-based weather station
1
CM106 Tripod
2. Specifications
Measurement Height
Upper Mast Retracted: 7 ft (2.1 m)
Upper Mast Extended: 10 ft (3 m)
Vertical Load Limit: 100 lb (45 kg)
Mast Outer Diameter
Main Lower Mast: 1.90 in. (48 mm)
Retractable Upper: 1.74 in. (44 mm)
Base Diameter: 9.3 ft (2.8 m)
Leveling Adjustment: Slide collars on each leg, adjust individually
Leg Base: 4 in. by 5 in. with four 0.62 in. holes for stakes
Portability: Collapsible to 8 in. diameter by 6 ft length
Weight with Mast: 40 lb (18 kg)
Maximum Slope Angle: 22° or 40% grade (assuming leg clamp pins are
engaged in holes under the legs and that one
leg points downhill while the other two legs
point uphill)
Allowable Wind Speeds*
Tripod Configuration Sustained Wind Wind Gust
Mast Extended, Unguyed 65 mph (29 m/s) 84 mph (38 m/s)
Mast Retracted, Unguyed 80 mph (36 m/s) 104 mph (46 m/s)
Mast Extended, Guyed 100 mph (45 m/s) 130 mph (58 m/s)
Mast Retracted, Guyed 115 mph (51 m/s) 150 mph (67 m/s)
*Allowable wind speed values assume:
• 14 x 16 in. enclosure at mast base
• 10.5 x 16.5 in. solar panel at mast base
• Crossarm and sensors (1.4 ft
• Adequate ground anchors (stakes can pull out at lower wind speeds)
2
projected area) at mast top
3. Tools List (for tripod, mast, enclosures, and
crossarms)
1/2” and 7/16” open end wrenches
adjustable wrench
Phillips head screw drivers (medium, small)
Straight bit screwdrivers (large, medium)
12” torpedo level
side-cut pliers
pencil
tape measure
compass and site declination angle
shovel
sledge hammer (for driving ground rod and stakes)
step ladder
2
4. Tripod Components
d
d
Figure 4-1 shows the tripod components. The tripod base is packaged with the
mast, ground rod, lightning rod and (6) stakes. The ground rod clamp,
lightning rod, cable ties, and grounding wires are enclosed in a bag. The
optional guy kit is packaged separately.
CM106 Tripod
(12) Cable Ties
Grounding Wires
(6) Stakes
Mast
Mast Extension
Base
Lightning Ro
and Clamp
Ground Ro
and Clamp
FIGURE 4-1. Tripod components
3
CM106 Tripod
5. Tripod Installation
5.1 Tripod Base
WARNING
Tripod installation near power lines is dangerous. The
minimum safe recommended distance from overhead
power lines is 2 times the height of the tripod and mast
combined. Call Blue Stakes to locate buried utilities
prior to installation.
The tripod base has three legs, which are individually adjustable, that allow the
tripod to be installed over non-level terrain.
Prepare the area where the tripod will be installed. The tripod requires an area
approximately 9.3 ft (2.8 m) in diameter. Natural vegetation and the ground
surface should be disturbed as little as possible, but brush and tall weeds should
be removed.
Stand the tripod base up on end, and rotate the feet perpendicular to the legs.
Each leg has a slide collar and T-knob with a spring loaded pin that locks into
holes located on the underside of the leg as shown in Figure 5-1.
Holes for Pins
Slide Collar
T-Knob
FIGURE 5-1. Tripod leg, slide collar components
5.1.1 Mounting on a Relatively Flat Area
Loosen the T-knob and extend each leg until the pin engages in a hole (depress
the tab to disengage the pin from a hole). With the legs extended, orient the
tripod so that one of the legs points South (assuming the instrument enclosure
with -MM Mast Mount bracket will face North). If the instrument enclosure
has the -LM Leg Mount bracket, orient the tripod so that the enclosure will
Spring-Loaded Pin
4
mount to one of the three leg mount positions on the tripod, facing the desired
direction. The tripod is typically plumbed after the mast has been installed, as
described in Section 5.2.
5.1.2 Mounting on an Incline
Loosen the T-knob and extend each leg until the pin engages in a hole (depress
the tab to disengage the pin from a hole). With the legs extended, orient the
tripod so that one leg points downhill and the other two legs point uphill. The
tripod is more stable with only one leg pointed downhill because the mast is
closer to the center of the footprint (see Figure 5-2).
The tripod is typically plumbed after the mast has been installed, as described
in Section 5.2.
CM106 Tripod
FIGURE 5-2. Comparison of one leg pointing downhill (right) versus
two legs pointing downhill
5
CM106 Tripod
5.2 Mast
The CM106 includes a mast extension that can be fully extended for a 10 ft
(3m) height, or partially extended for a 7 ft (2.1 m) height. Remove the bolts in
the extension, align the holes in the insert with holes in the mast, and install the
four bolts previously removed.
Extension for
7 ft (2.1 m) height
Extension for
10 ft (3 m) height
Mast
FIGURE 5-3. Tripod mast and insert
6
Mast
CM106 Tripod
(6) Bolts
Tab
FIGURE 5-4. Mast attachment to tripod base
Loosen the nine bolts shown in Figure 5-4. Slide the mast into the tripod base,
making sure that it extends below the lower bolts and rests on the tab. Tighten
the six bolts to secure the mast.
Plumb the tripod by adjusting the northeast and south facing legs. With a level
on the East side of the mast, adjust the Northeast leg for plumb. With the level
on the South side of the mast, adjust the South leg for plumb. Tighten the
T-knobs after the adjustments have been made.
7
CM106 Tripod
5.3 Installing the Optional Guy Kit
PN 27117 CM106 Guy Kit can be ordered separately for areas that experience
high wind speeds (Section 2). Install the guy brackets to the mast as shown in
Figure 5-5. Attach the three guy wires to the guy collar and slide the collar over
the mast so that the collar butts against the brackets.
Guy Collar
Guy Wire
Guy Bracket
FIGURE 5-5. Guy collar
On the end of each guy line is a case and hardware to attach to the turnbuckles.
Unscrew the turnbuckles so that only 1/2 in of thread extends beyond the inside
of the turnbuckle body. Attach the case and turnbuckle to the tripod leg as
shown in Fig 5-6. Loosen the Phillips screw, and remove the slack in the guy
line by feeding the load end of the guy wire through the wedge while pulling
up on the dead end. If the load end of the guy wire can’t be fed through the
case, use a small flat screwdriver to push the wedge forward into the case to
disengage wedge.
After the slack has been removed from the guy lines, tighten the Phillips
screws and tighten the turnbuckles to tension the guy lines.
8
Turnbuckle
CM106 Tripod
Case
Wedge
Phillips Screw
FIGURE 5-6. Leg attachment
9
CM106 Tripod
5.4 Staking the Tripod Feet
Six stakes are provided for securing the tripod feet to the ground. Drive two
stakes through holes in each foot at an angle as shown in Figure 5-7.
Stakes may not be adequate depending on soil structure, maximum wind
speeds experienced at the site, mast height, or wind load from the
instrumentation. For questionable situations, additional stakes (PN 17049) or
even concrete footings for the tripod feet and guy anchors should be
considered.
FIGURE 5-7. Staking the tripod feet
10
5.5 Tripod Grounding
Place the clamp over the ground rod and drive the rod (close to the center of
the tripod) using a sledge hammer or fence post driver. Strip 1/2” inch of
insulation from both ends of the black 4 AWG ground wire. Insert one end of
the ground wire between the clamp and ground rod and tighten the bolt on the
clamp. Attach the other end of the ground wire to the lug on the tripod base as
shown in Figure 5-8.
CM106 Tripod
Ground Lug
Ground Wire
Enclosure Ground Wire
FIGURE 5-8. Ground rod and clamp
Enclosure Ground Lug
11
CM106 Tripod
Strip 1/2” of insulation from the ends of the green 12 AWG wire. Attach one
end of the wire to the tripod ground lug, and the other end to the enclosure
ground lug as shown in Figure 5-9.
Mount the lightning rod and clamp to the tripod mast with pointed tip up, and
notch at bottom, as shown in Figure 5-9.
Lightning Rod
Clamp
12
FIGURE 5-9. Lightning rod and tripod grounding lug
5.6 Crossarm Attachment
Attach the CM202 (2 ft, 0.6m), CM204 (4 ft, 1.2m), or CM206 (6 ft, 1.8m)
crossarm to the tripod mast as shown in Figure 5-10. For wind sensors, the
crossarm should be approximately 103 inches above the ground for a 3m
mounting height, or 64 inches for a 2m mounting height. Typically the
crossarm is oriented East/West for wind sensors, North/South for
pyranometers.
CM106 Tripod
FIGURE 5-10. CM204 Crossarm
5.7 Enclosure Attachment
The ENC 10/12, ENC 12/14, ENC 14/16, and ENC 16/18 enclosures can be
ordered with mounting brackets for the CM106 tripod. All enclosure models
can be mounted to the tripod mast (above the legs) with the –MM Mast Mount
bracket option. All enclosure models except the ENC 16/18 can be mounted to
the tripod base and leg with the –LM Leg Mount bracket option. Two
enclosures with the –LM brackets can be mounted in a “back to back”
configuration.
5.7.1 Enclosure Mounting to Tripod Mast
An enclosure ordered with the –MM bracket has a three-piece top and bottom
brackets with a U-bolt for each bracket.
CM200 Series
Crossarm
Tripod Mast
Attach an enclosure with the –MM mounting bracket to the tripod mast as
follows:
Remove the U-bolts washers and nuts from the brackets.
Position the enclosure against the tripod’s mast (North side recommended).
13
CM106 Tripod
–
Install the U-bolts, flat washers, lock washers, and nuts. Tighten the nuts until
the lock washers are compressed.
Route the 14 AWG wire from the grounding lug on the bottom side of the
enclosure to the grounding lug on the base of the tripod (Figure 5-8). Strip
1/2” of insulation from each end of the wire. Insert wire ends into the
grounding lugs and tighten.
U-Bolt
FIGURE 5-11. Enclosure with the –MM Bracket
5.7.2 Enclosure Mounting to Tripod Leg
An enclosure ordered with the –LM bracket has a bracket on each side of the
enclosure, and a U-bolt bracket for securing the enclosure to a tripod leg.
Attach an enclosure with the –LM mounting bracket to the tripod base as
follows:
MM Bracket
Slide the keyhole notch in upper corner of the -LM bracket over the extended
screw head located on the tripod base as shown in Figure 5-12, and engage the
notch in the lower corner of the -LM bracket with the enclosure tab. There are
two places on the tripod base with provisions for mounting enclosures with the
-LM brackets.
14
CM106 Tripod
Remove the washers, nuts and U-bolt from the U-bolt bracket. Install the
bracket as shown in Figure 5-12 (top). Tighten the nuts on the U-bolt until the
lock washers are compressed.
Route the 14 AWG wire from the grounding lug on the bottom side of the
enclosure to the grounding lug on the base of the tripod (Figure 5-8). Strip 1/2”
of insulation from each end of the wire. Insert wire ends into the grounding
lugs and tighten.
U-Bolt Bracket
Screw Head
Enclosure Tab
FIGURE 5-12. Enclosure with the –LM Bracket
15
CM106 Tripod
6. Mounting Brackets
Mounting brackets covered in this section have U-bolts that attach to vertical
and/or horizontal pipes with the following ranges of outside diameters:
inches mm Nominal Pipe Size (inches)
1.5” U-bolt 1.0 – 1.5 25.4 – 38.1 ¾ – 1
2” U-bolt 1.3 – 2.1 33.0 – 53.3 1 – 1 ½
2” U-bolt
with plastic V-block
Some of the brackets (e.g. the CM210) include 1.5” and 2” U-bolts to extend
the range of pipe diameters that the bracket can accommodate. Brackets with
holes for a 1.5” U-bolt will accept a user-supplied 1.75” U-bolt.
1.0 – 2.1 25.4 – 53.3 ¾ – 1 ½
6.1 CM210 Crossarm Mounting Kit
CM200 series crossarms include a CM210 bracket as shown in Figure 6-1.
The CM210 can be ordered separately to attach a user-supplied pipe (1.0 –
1.5” OD) to a mast or tower leg (1.0 – 2.1” OD), or to attach a crossarm to two
tower legs.
CM210
FIGURE 6-1. CM210 Crossarm Mounting Kit (shown with user-supplied
16
pipe)
6.2 CM216 Mast Mounting Kit
The CM216 attaches to the top of the mast, and provides a 3/4” or 1” mounting
pipe (1.05” or 1.32” OD) that extends 4” above the mast, as shown in Figure
6-2.
CM216
CM106 Tripod
FIGURE 6-2. CM216 Mast Mounting Kit
17
CM106 Tripod
6.3 CM220 Right Angle Mounting Kit
The CM220 attaches a vertical pipe (1.0 – 1.5” OD) to the CM200 series
crossarms or horizontal pipe (1.0 – 1.5” OD) as shown in Figure 6-3.
CM220
CM220
FIGURE 6-3. CM220 Right Angle Mounting Kit
18
6.4 CM225 and 18098 Pyranometer Mounting Stand
The CM225 is used to attach a pyranometer or quantum sensor to a horizontal
pipe (1.0 to 2.1” OD) or vertical pole (1.0 to 2.1” OD).
The LI200X pyranometer and LI190SB quantum sensor mount to the CM225
via the LI200S leveling base (see Figure 6-4). The CS300 pyranometer mounts
to the CM225 via the 18356 leveling base. The CMP3 and LP02 pyranometers
include their own bubble level and leveling screws allowing them to mount
directly to the CM225.
The 18098 provides a larger surface for mounting a user-supplied Eppley
pyranometer.
CM106 Tripod
LI2003S
CM225
LI200X Pyranometer
CM225
FIGURE 6-4. CM225 Pyranometer Mounting Stand
19
CM106 Tripod
6.5 CM230 Adjustable Angle Mounting Kit
The CM230 mounts an antenna (1.0 – 1.5” OD) to a mast or vertical pipe
(1.3 – 2.1” OD) as shown in Figure 6-5. The bracket allows the antenna to be
adjusted for different angles.
CM230
FIGURE 6-5. CM230 Adjustable Angle Mounting Kit
20
6.6 CM235 Magnetic Mounting Stand
The CM235 provides a 3.5” (8.8 cm) square platform for mounting magnetic
base antennas. The CM235 attaches to horizontal or vertical pipes (1.0 –
2.1” OD) as shown in Figure 6-6.
CM106 Tripod
FIGURE 6-6. CM235 Magnetic Mounting Stand
21
CM106 Tripod
6.7 RM Young Gill Radiation Shields
RM Young Gill Radiation Shields are used to house and attach temperature and
relative humidity sensors to the tripod mast (1.0 – 2.1” OD) or crossarm as
shown in Figure 6-7. Radiation shields ship with the U-bolt configured for
attachment to a vertical pipe. To attach the radiation shield to a horizontal
pipe, the U-bolt and plastic V-block must be moved to the other set of holes.
FIGURE 6-7. RM Young Gill Radiation Shield
22
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