li-cor 7900-300 heavy duty adjustable tripod

Heavy Duty Adjustable TripodInstruction Manual

Heavy Duty Adjustable TripodInstruction Manual

LI-COR Biosciences4647 Superior StreetLincoln, Nebraska 68504Phone: +1-402-467-3576Toll free: 800-447-3576 (U.S. and Canada)[email protected]

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LI-COR Distributor Network:www.licor.com/envdistributors

NoticeThe information contained in this document is subject to change without notice.

LI-COR, INC. MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUTNOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULARPURPOSE.

LI-COR, Inc. shall not be liable for errors contained herein or for incidental or consequential damages in connection withthe furnishing, performance, or use of this material. This document contains proprietary information which is protectedby copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to anotherlanguage without prior written consent of LI-COR, Inc.

LI-COR is a registered trademark of LI-COR, Inc. All other trademarks or registered trademarks are property of theirrespective owners.

Printing HistoryPublication Number: 988-12678© Copyright 2013 to 2018, LI-COR, Inc. All rights reserved.Build Date: Monday, September 27, 2021

New editions of this manual will include all updates. An update addendum may be used between editions to provide up-to-date information. Revisions are indicated by the revision number. Minor updates, which do not alter the meaning ofthe content, will be incorporated without affecting the revision number.

Publication Date Changes

December 2012 First Edition

November 2014 Minor changes, clarify tools list.

January, 2018 Removed obsolete URLs; added 24 mmwasher.

Notes on SafetyThis LI-COR product has been designed to be safe when operated in the manner described in this manual. The safety ofthis product cannot be guaranteed if the product is used in any other way than is specified in this manual. The product isintended to be used by qualified personnel. Read this entire manual before using the product.

Equipment markings:

The product is marked with this symbol when it is necessary for you to refer to the manual oraccompanying documents in order to protect against injury or damage to the product.

WARNING Warnings must be followed carefully to avoid bodily injury.

CAUTION Cautions must be observed to avoid damage to your equipment.

Manual markings:

Warning Warnings must be followed carefully to avoid bodily injury.

Caution Cautions must be observed to avoid damage to your equipment.

Note Notes contain important information and useful tips on the operation of your equipment.

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iii

Contents

Section 1. General Information

Safety Information 1-1Precautions 1-2Site Selection 1-4Soil Conditions 1-5Loading the Tripod 1-6Components 1-8

Tripod 1-8GuyWire Kit 1-10Grounding Kit 1-11Component List 1-12

Tools 1-13

Section 2. Assembling the Tripod

Legs and Base 2-1Mast and GuyWires 2-4Anchor the Tripod 2-9

Section 3. Maintenance

Monthly 3-1Every 6 Months 3-1

Section 4. Tripod Accessories

Gas Analyzer and Sonic Anemometer Mounting Hardware 4-1Cross Arm Kit 4-2Light Sensor and Radiometer Mount 4-2

Appendix A. Specifications

Appendix B. Warranty

Section 1.General Information

The 7900-300 Heavy Duty Adjustable Tripod is a robust scientific instrument plat-form designed to support LI-COR® eddy covariance systems and sensor arrays inlong-term field deployments. It can accommodate a simple eddy covariance system,consisting of an LI-7500DS and a sonic anemometer, or a fully outfitted system withan LI-7200RS, 7200-101 Flow Module, LI-7700 CH4 Analyzer, ancillary sensors, aBiomet system, and more. It is designed withstand extreme outdoor conditions,including high wind conditions.

Safety InformationThe 7900-300 Heavy Duty Adjustable Tripod has been designed to be safe when oper-ated in the manner described in this manual. The safety of this product cannot beguaranteed if the product is used in any other way than described in this manual. Besure to read and understand all of the safety information included in this manual.

The equipment includes the following markings:

This symbol indicates that the user must read the instruction manual priorto assembling or using the tripod.

This symbol indicates that it is mandatory to check for overhead powerlines prior to assembling the tripod.

This symbol indicates that the tripod is not suitable for stepping orclimbing.

1-1Heavy Duty Adjustable Tripod


This label indicates that users should never lean a ladder against the tripod.

PrecautionsWarning: Read all the instructions in this manual prior to assembling, moving,or disassembling the tripod.

Warning: Never cover or conceal the safety labels that are attached to the tripod.Doing so could lead one to fail to observe the safety warnings and sustain per-sonal injury or damage to equipment through the use of the tripod.

Warning: Assembly of the 7900-300 Adjustable Heavy Duty Tripod should be car-ried out with a minimum of two people. Attempts to assemble the tripod with aninsufficient number of people could lead to personal injury.

Caution: Each stake must withstand 275.8 kg (608 lbs) of lateral load and 392.8kg (886 lbs) of downward load in order to meet the 161 kph (100 mph) wind loadspecification. These conditions are met if the tripod is installed as described inthis manual. If your site conditions deviate from those described here (see SoilConditions on page 1-5) select an alternate site.

Warning: Conduct a pre-installation site visit to determine proper soil com-position for a successful tripod installation. Acceptable soil conditions (see SoilConditions on page 1-5) should be studied in advance of the pre-installation trip.

Warning: The tripod is not suitable for installation on solid rock, soils that arecomposed of a rocky substrate, or other hard surfaces that will not allow install-ation of any of the following: earth anchors, foot stakes, or grounding rod. Inthese conditions the tripod may not meet the specifications described in theinstructions and additional measures may be required to stabilize the tripod. Ifyou have these conditions, consult with a local geotechnical engineer to determ-ine whether soil at your site is suitable for the tripod.

1-2 Heavy Duty Adjustable Tripod

Warning: The tripod may not be adequate for every situation depending on soilstructure, maximum wind speeds experienced at the site, mast height, or windload from the instrumentation. If uncertain, seek the advice of structural and geo-technical engineers.

Warning: It may not always be possible to plumb the tripod mast with the legadjustments. The tripod should not deviate more than 2.3° from true vertical(approximately 15.2 cm (6 in) of deviation at the top of the upper mast). Makesure your experiment objectives will not be adversely affected by the deviationfrom plumb. If the mast deviates from vertical, it should lean toward the uphillside. Make sure the feet - especially the downhill feet - are firmly anchored onsolid ground (see Install the Foot Stakes on page 2-14).

Warning: Never lean a ladder against the tripod. Doing so may causestructural failure and result in severe injury, death, and/or damage toequipment.

Warning: Never step on the legs or leg braces; and never attempt toclimb the tripod. Doing so may result in severe injury, death, and/ordamage to equipment.

Warning: Do not hang from the tripod or cross arm. Doing so maycause the tripod to fall or fail, and result in severe injury, death, and/ordamage to equipment.

Warning: Never weld the tripod or attach a bracket that serves to sup-port a climbing apparatus. Doing so will compromise the strength ofthe tripod and may result in injury, death, and/or damage to equip-ment.


1-3Precautions


Site SelectionCareful site selection will provide simpler setup and ensure that your sensors collecthigh-quality, representative data. The site should accommodate the tripod and guywires without interfering with any of the tripod components. The feet require anunobstructed area with a 2.54 m (8 ft 4 in) diameter. The guy wires require an areawith an 8 m (26 ft 3 in) diameter.

As a general rule, disturb the site as little as possible. Prior to assembling the tripod,remove any woody brush or tall plants that are in the way of the tripod feet and guywires.

Warning: It is dangerous to install the tripod close to overhead powerlines, buried power lines, underground gas lines, or unexploded ord-nances. Keep a minimum distance of at least 2 times the height of thetripod (including the lightning rod) between the tripod and nearestoverhead line. Prior to installing the ground rod or anchors, be surethat there are no underground utilities, power lines, unexploded ordnances, orother installations at your site.


Soil ConditionsThe Heavy Duty Adjustable Tripod can be adequately supported in “average” soil.“Average” soils are defined as stiff silts and clays containing up to 50% sand andgravel and having blow counts (N) of 8 to 16 per ASTM D 1586 and unconfinedcompressive strengths of 1500 to 3000 pounds per square foot. This soil would bedefined as Class 6 in accordance with the literature of Foresight® Products, the man-ufacturer of the Duckbill® Model 68 earth anchors intended for use with the tripod.The tripod is not to be installed in clean sands or gravels.

Aluminum that is in contact with soil with a pH above 8.5 or below 4.5 (e.g., non-draining clay-organic and fertilized fields) will corrode faster. If your site has soilthat meets these conditions take measures to physically separate the aluminum feetfrom the soil (e.g., place a sheet of sturdy plastic from a heavy duty trash bagbetween the metal and soil) and check the condition of the feet and stakes regularly.

Warning: The tripod is not suitable for installation on solid rock, soils that arecomposed of a rocky substrate, or other hard surfaces that will not allow install-ation of any of the following: earth anchors, foot stakes, or grounding rod. Inthese conditions the tripod may not meet the specifications described in theinstructions and additional measures may be required to stabilize the tripod. Ifyou have these conditions, consult with a local geotechnical engineer to determ-ine whether soil at your site is suitable for the tripod.


1-5Soil Conditions


Loading the TripodLoad the tripod according to the maximum weights and frontal areas given below.

Warning: The guy kit, earth anchors, and foot stakes must be installed to meetthe tripod specifications. If these components are not installed, the tripod may fallor fail, resulting in injury, death, and/or damage to equipment.

Cross Arm (each side)Maximum Load: 12.25 kg (27 lbs)Maximum Frontal Area: 0.19 m2 (2.05 ft2)

Upper MastMaximum Load: 12.25 kg (27 lbs)Maximum Frontal Area: 0.18 m2 (1.94 ft2)

Legs (each)Maximum Load: 12.25 kg (27 lbs)Maximum Frontal Area: 0.21 m2 (2.26 ft2)

Lower MastMaximum Load: 24.5 kg (54 lbs)Maximum Frontal Area: 0.37 m2 (3.98 ft2)

Leg Braces (each)Maximum Load: 12.25 kg (27 lbs)Maximum Frontal Area: 0.21 m2 (2.26 ft2)


Tripod Component Maximum Load Maximum Frontal Area

Cross ArmLeft 12.25 kg (27 lbs) 0.19 m2 (2.05 ft2)Right 12.25 kg (27 lbs) 0.19 m2 (2.05 ft2)

MastsUpper 12.25 kg (27 lbs) 0.18 m2 (1.94 ft2)Lower 24.5 kg (54 lbs) 0.37 m2 (3.98 ft2)

LegsLeg 1 12.25 kg (27 lbs) 0.21 m2 (2.26 ft2)Leg 2 12.25 kg (27 lbs) 0.21 m2 (2.26 ft2)Leg 3 12.25 kg (27 lbs) 0.21 m2 (2.26 ft2)

Leg BracesLeg Brace 1 12.25 kg (27 lbs) 0.21 m2 (2.26 ft2)Leg Brace 2 12.25 kg (27 lbs) 0.21 m2 (2.26 ft2)Leg Brace 3 12.25 kg (27 lbs) 0.21 m2 (2.26 ft2)

Total: 134.75 kg (297 lbs) 2.19 m2 (23.58 ft2)


1-7Loading the Tripod


ComponentsThe tripod includes the following components. If you have just taken delivery ofyour shipment, check to be sure it includes everything that you ordered.

TripodLower Mast partnumber : 9879-014

Lower Mast (1): 1.95 m (6'5") long; 6 cm (2.375") Outside Diameter (OD) Schedule40 Aluminum Pipe 6061-T6.

Upper Mast part num-ber: 9879-009

Upper Mast (1): 1.95 m (6'5") long; 6 cm (2.375") OD Schedule 40 Aluminum Pipe6061-T6.

Legs part number:9879-0006

Legs (3): 1.75 m (5'9") long; 6 cm (2.375") OD Schedule 40 Aluminum Pipe 6061-T6.

Leg Extensions partnumber: 9879-012

Leg Extensions (3): 0.82 m (2'9") long; 4.8 cm (1.9") OD; Schedule 80 AluminumPipe 6061-T6.


Leg Braces part num-ber: 9879-015

Leg Braces (3): 0.82 m (2'9") long; 6 cm (2.375") OD Schedule 40 Aluminum Pipe6061-T6.

Cross Arm part num-ber: 9879-010

Cross Arm (1): 1.5 m (59") long, 3.3 cm (1.3") OD Schedule 80 Aluminum Pipe6061-T6.

Cross Arm MountingHardware

Includes a mounting plate, four mounting brackets, and a hardware kit of u-bolts,washers and nuts.

Tripod Hardware partnumber 9979-017

Tripod Hardware: Sixteen M12 19 mm, 90 mm long bolts; Sixteen M12 19 mmnuts; Thirty two M12 washers; Sixteen M12 lock washers; stainless steel.

Tripod feet part num-ber 9879-011

Feet (3): 28.5 cm x 28.5 cm (11.25" x 11.25").

Foot stakes part num-ber 9879--028

Foot Stakes (6): 42.5 cm (16.7") length.


1-9Tripod


Guy Wire KitGuy Wire Kit partnumber: 9979-003

Guy Wire Fitting and Hardware (1): Aluminum 6061-T6.

Guy Wires (3): 7.62 m (25') Zinc-aluminum Coated Steel.

Gripple® Cable Clasps (11): Gripple Plus Medium.

Duckbill® Anchors (4): Model 68 Duckbill® Earth Anchors w/ 168 cm (66 in)Cable.

Cable Thimbles (7): 0.32 cm (0.125") Open Thimble

Gripple® Release key (2) - "Blue Flag Key"


Grounding KitGrounding Kit partnumber 9979-004

Lightning Rod/Ground Wire Clamps (3): To secure the lightning rod and groundwire to the mast.

Ground Rod Clasp (1): To secure the ground wire to the ground rod.

Ground Wire (1): 1.22 m (4'), 8 AWG Copper Wire.

Ground Rod (1): 1.83 m (6') long; 1.6 cm (0.63") OD

Lightning Rod (1): 1.83 m (6') long; 0.3 cm (0.12") OD

Spare Parts: Includes extra U-bolts, washers and nuts for the cross-arm, extra 90 and100 mm bolts, washers, and nuts, and an extra cable thimble.


1-11Grounding Kit


Component List

Component Part Number

TripodLower Mast (1) 9879-014Upper Mast (1) 9879-009Legs (3) 9879-006Leg Extensions (3) 9879-012Leg Braces (3) 9879-015Feet (3) 9879-011Foot Stakes (6) 9879-028Assembly Hardware 9979-017Cross ArmMounting Hardware (1) 9979-018Cross ArmMounting Plate (1) 9879-020Cross Arm Brackets (4) 9879-043Cross Arm (1) 9879-010

GuyWire Kit 9979-003Tripod GuyWires (3) 609-13061

Gripple® Cable Clasps (11) in 609-13061Gripple® Release Key (2) in 609-13061

Earth Anchors (4) 609-13089Duckbill® Anchor Drive Rod (1) 609-12946GuyWire Fitting (1) 9879-018GuyWire Fitting Hardware (1) 9979-019Cable Thimbles (7) 609-12899

Grounding Kit 9979-004Lightning Rod (1) 9879-033Pipe Ground Clamps (3) 609-12523Ground Rod Clasp (1) 609-12521GroundWire (1) 374-12937Ground Rod (1) 609-12518

Spares Kit 9979-012Cross ArmMounting HardwareAssembly HardwareCable Thimble (1)


ToolsWe recommend the following tools for assembly. Tools are not provided with the tri-pod but can be purchased from a hardware or department store.

Gloves Safety Glasses

19 mmWrench (13 mm Optional) TorqueWrench and Sockets (19 mm and 13 mm)

Hex Key (8 mm) Standard (Slotted Tip) Screwdriver

Sledge Hammer (2.27 kg, 5 lb or larger) Torpedo Level

Measuring Tape (7.6 m, 25 ft)Fence Post Driver (optional)

Adjustable Wrench (optional)Pliers (optional)

Step Ladder (4 m, 13 ft; to install sensors)


1-13Tools

Section 2.Assembling the Tripod

Legs and Base1 Attach One Leg to the Mast

Gather the following components for one leg: lower mast, leg, leg extension, legbrace, foot, 90 mm bolts, lock washers, flat washers, and nuts.

Attach the leg to the mast as shown below. Tighten the nut(s)to finger-tight for now. When the tripod mast and legs arecompletely assembled, tighten it to 23 N•m (204 lb•in; 17lb•ft) using a torque wrench.



2 Attach the Leg Brace to the Mast and Leg

Attach the leg brace between the leg and mast as shown below. Be sure the warninglabel is near the mast.

Warning: Pinch point. Use caution during assembly.

Tighten the nut(s) to finger-tight for now. When the tripod mast and legs are com-pletely assembled, tighten it to 23 N•m (204 lb•in; 17 lb•ft) using a torque wrench.


3 Attach the Leg Extension and Foot

Attach the leg extension and foot to the leg, as shown below.


Tighten the nut(s) to finger-tight for now. When the tripod mast and legs are com-pletely assembled, tighten it to 23 N•m (204 lb•in; 17 lb•ft) using a torque wrench.

4 Attach the Remaining Two Legs

Repeat the steps above with the remaining two legs.


2-3Section 2. Assembling the Tripod


Mast and Guy Wires5 Install the Upper Mast

The upper mast extends the reach of the tripod up to 4 meters (13.12 feet). Slide theupper mast over the lower mast. Secure it with a 90 mm bolt, nut, and two washers.Tighten the nut to 23 N•m (204 lb•in; 17 lb•ft) using a torque wrench.


6 Install the Guy Wire Fitting

Think ahead about the desired position of the tripod and sensors with respect to themeasurement height and sensor orientation. Install the guy wire fitting at the properheight to ensure that the guy wires will extend to the ground at a 45° angle (seeInstall the Guy Anchors and Wires on page 2-15).

Caution: The guy wire fitting should be placed on the mast extension prior toadding the cross arm. The collar provides an additional safety stop in the eventthat the cross arm bracket slips on the mast.


Position the guy wire fitting on the mast so that is as close as possible tothe anticipated cross arm location. It must still be under the cross arm.Secure it with a 100 mm bolt, nut, two flat washers, and a lock washer.Tighten the nut 23 N•m (204 lbs•in; 17 lb•ft).


2-5Mast and Guy Wires


7 Install the Cross Arm

The cross arm mounts to the mast with the cross arm bracket. Attach the bracket tothe mast with U-bolts, flat washers (24 mm M8), lock washers (M8) and nuts (13mm M8) from the cross-arm bracket hardware bag.


Observe the proper orientation of the cross arm bracket, as shown in the imagebelow.

Install the cross arm up to 30.5 cm (12 inches) from the guy collar, centered on themast. Adjust the guy collar as needed to minimize the distance as much as possible.Tighten the cross arm nuts to 9.6 N•m (85 lb•in; 7 lb•ft).


8 Install the Guy Wires on the Mast

Insert a cable thimble into each of the cable holes in the guy wire fitting.

Warning: The earth anchor cables are stiff, corrosion resistantwire rope. Wear gloves and safety goggles when handlingthem.

Then, insert about 22.9 cm (9 inches) of the cable through the Gripple® accordingto the arrows on the Gripple. To release the Gripple see Tighten the Guy Cables onpage 2-17.

Route the cable around the thimble, through the guy wire fitting, and secure itthrough the other side of the Gripple. The cable should extend at least 7.6 cm (3 in)past the Gripple. Repeat this for each guy wire.


2-7Mast and Guy Wires


9 Install the Lightning Rod

Install two lightning rod clamps as shown below. Attach the lightning rod to themast with the two clamps. Use an 8 mm hex key to tighten the lightning rod.

10 Raise the Tripod

Prior to raising the tripod, consider access to the site, the position of the cross-armwith respect to expected orientation of sensors, and wind direction. Set two legs inposition and lift the mast until the tripod is in the vertical position. Enlist the helpof an assistant if needed.


Anchor the Tripod11 Drive the Mast Anchor into the Ground

The earth anchor is to secure the mast to the ground. Think ahead about the pos-ition of the tripod—or even set the tripod in position, then identify the point on theground where the anchor should be driven. Position the anchor so the cable willlead to the mast anchor attachment point. Set the tripod aside and drive the anchor.Note: Do not attach the mast anchor to the mast yet.

Warning: Read the notes on site selection (see Site Selection on page 1-4) beforedetermining the final location for the tripod.

Use the 91.4 cm (36 inch) driving rod, drive the anchor to a depth of 85 cm (33.5inches).

Depth of 85 cm

(33.5 in)


...to rotate the

anchor under-

ground.

Pull firmly on the

cable...


2-9Anchor the Tripod


When setting the earth anchor, the cable will give several centimeters (~1 inch)when the anchor rotates underground.

Caution: When installed in suitable soil (see Soil Conditions on page 1-5), the tri-pod can withstand a 161 kph (100 mph) wind while supporting a load. If soil con-ditions deviate from those described here, take measures to ensure that the mastanchor can withstand 392 kg (864 lbs) of upward force in order to ensure that thetripod will meet the wind and load specifications.

12 Install the Ground Rod

Position the ground rod 46 to 61 cm (18 to 24 in) from the mast/earth anchor. Driveit into the ground with a hammer or post driver, leaving about 10 cm (4 in) abovethe ground.

Note: Slide the ground rod clasp on the ground rod prior to driving the rod intothe ground. The tip of the ground rod may become deformed as it is driven, mak-ing it impossible to install the ground wire clasp afterwards.


13 Plumb the Mast

Move the tripod into the desired position and use a torpedo level to check the ver-tical orientation of the mast on adjacent sides. Adjust one or more legs until thelevel indicates that the mast is plumb.

Each leg can be extended or retracted in 5.1 cm (2 in) increments. Each leg has 2adjustment holes spaced at 15.2 cm (6 in), whereas each leg extension has 6 adjust-ment holes spaced at 10.2 cm (4 in).

Warning: It may not always be possible to plumb the tripod mast with the legadjustments. The tripod should not deviate more than 2.3° from true vertical(approximately 15.2 cm (6 in) of deviation at the top of the upper mast). Makesure your experiment objectives will not be adversely affected by the deviationfrom plumb. If the mast deviates from vertical, it should lean toward the uphillside. Make sure the feet - especially the downhill feet - are firmly anchored onsolid ground (see Install the Foot Stakes on page 2-14).




14 Torque the Nuts and Bolts

Tighten the nuts and bolts on the legs, leg extensions, leg braces and feet to 23 N•m(204 lb•in; 17 lb•ft). If not adequately tightened in the previous steps, tighten thecross arm nuts to 9.6 N•m (85 lb•in; 7 lb•ft), the guy wire fitting to 23 N•m (204lb•in; 17 lb•ft), and the upper mast nut and bolt to 23 N•m (204 lb•in; 17 lb•ft).


15 Connect the Mast Anchor

Insert a thimble into the anchor point on the mast.


Insert 22.86 cm (9 in) of earth anchor cable into a Gripple® according to the arrowsthat are visible on the exterior of the Gripple device, loop it through a thimble, andthen back into the Gripple. Tighten the cable securely around the thimble.

To tighten the cable,hold the Gripple inone hand and pullthe end of the cablethrough the Gripple.Coil any extra cableand secure it withzip ties. To releasethe Gripple seeTighten the Guy Cables on page 2-17.




16 Install the Foot Stakes

Foot stakes serve to securethe feet and prevent themfrom moving on theground. Using a hammer,drive two stakes into oppos-ite corners of each foot. It isnormal for the top of eachstake to deform when it isdriven. Note: Beforeinstalling the stakes, be surethe tripod is positionedexactly as desired and thatthe mast is vertical (seePlumb the Mast onpage 2-11). Adjustments are more difficult after the foot stakes have been installed.

Caution: Each foot must withstand 275.8 kg (608 lbs) of lateral load and 392.8 kg(886 lbs) of downward load in order to meet the 161 kph (100 mph) wind loadspecification. These conditions are met if the tripod foot stakes are installed asdescribed in this manual. If your site conditions deviate from those described here(seeSoil Conditions on page 1-5) select an alternate site.

Warning: The stakes should be driven into opposite corners of each foot for max-imum stability. Never drive the anchors into adjacent corners.

Note: If the soil pH is above 8.5 or below 4.5 (e.g., non-draining clay-organic andfertilized fields) the aluminum that is in contact with the soil will corrode faster.For more information see Soil Conditions on page 1-5.


17 Install the Guy Anchors and Wires

The three remaining earth anchors are to secure the guy wires. Prepare each anchorby inserting the cable into a Gripple® connector according to the arrows printed onthe connector. Make a loop around a thimble and insert the other end of the cableinto the Gripple. Pull at least 7.62 cm (3 inches) of cable through the Gripple.Assemble the earth anchors, thimble and Gripple as shown.


Warning: Check to be sure that there are no underground utilities or unexplodedburied ordnance prior to installing the earth anchors. Failure to do so could resultin severe bodily injury, death and/or damage to equipment.

Caution: In order to meet the 161 kph (100 mph) wind load specification, eachanchor must withstand 180.1 kg (397 lbs) of force. The supplied anchors do this,provided that the tripod is installed in the recommended soil conditions. If soilconditions at your site deviate from those described here (see Soil Conditions onpage 1-5) select an alternate site.

Guy wires should be positioned at a 45° angle between the mast and earth anchors,as shown in the following figure. Vertical distances are between the ground and thetop of the guy wire fitting. Horizontal distances are from the mast to the earthanchor. Determine the location for each earth anchor with the tripod in its final pos-ition.




2.8 m (9 ft 2 in)

3.1 m (10 ft 2 in)

3.4 m (11 ft 2in)

3.7 m (12 ft 2 in)

3.9 m (12 ft 10 in)

2.5 m (8 ft 2 in)

2.3 m (7 ft 7 in)

2.8 m (9 ft 2 in)

3.1 m (10 ft 2 in)

3.4 m (11 ft 2 in)

3.7 m (12 ft 2 in)

3.9 m (12 ft 10 in)

2.5 m (8 ft 2 in)

2.3 m (7 ft 7 in)

45°

Use the Earth anchor driving rod and a sledge hammer to drive each anchor to adepth of 85 cm (33.5 inches). Each anchor should be driven at a 45° angle along thesame axis as the corresponding guy wire.

45°Note the orientation

of the anchor.

Anchor

Driving Rod

Pull firmly on the

cable...

...to rotate the anchor

underground.

Each anchor must be set after it is driven. Insert the driving rod into the cablethimble and pull firmly on the cable. You will feel the cable pull out several cen-timeters (about an inch) when the anchor rotates in the ground and locks in place.


18 Tighten the Guy Cables

Finish installing each guy wire by routing the guy cable through one side of aGripple® according to the arrows on the device, through the loop at the end of theguy anchor, and back through the Gripple, pulling at least 7.6 cm (3 in) through theGripple. Grab the Gripple and pull to get the cable snug. Coil any extra cable andsecure it with cable ties.


Warning: Do not over tighten the guy wires. When the guy wires are properlytightened there will be slight slack in the cable. Excessively tightened guy wiresapply a load to the tower, diminishing its ability to support the sensors.

Note: Position the upper guy wire Gripple as high up the cable as possible. Whenit is necessary to remove the cable, you can cut the cable close to the Gripple, pre-serving a significant portion of the cable for reuse.




Note: To release the Gripple, locate the Gripple release key in the Guy Wire Kit.Identify the hole in the Gripple, which can be found near either one of the cableinsertion points.

Insert the Gripple release key into this hole and press firmly. If there is tension onthe cable it may be helpful to relieve the tension. When the Gripple release key hasbeen pressed with sufficient pressure, the Gripple will release the cable, allowing youto move the cable freely within the Gripple.

19 Install the Ground Wire

Install the ground wire between the ground rod and the mast.

Note: The bolt in the ground rod clasp is a torque-limiting bolt that will break ifit is overtightened. Tighten it snugly onto the ground rod and ground wire.


20 Verify the Stability of the Tripod

As a final step, verify the stability of the tripod to ensure it is assembled properly.l Double check the vertical orientation of the tripod using a level (see Plumb the

Mast on page 2-11).l Check each nut and bolt to verify that each is tightened to the torque spe-

cification (see Torque the Nuts and Bolts on page 2-12).l Check the tightness of the guy cables and mast anchor. Adjust as necessary (see

Tighten the Guy Cables on page 2-17).



Section 3.Maintenance

Several routine maintenance procedures will ensure that the tripod is stable overtime.

Monthlyl Perform a visual inspection for damage or wear.l Check the orientation of the tripod to ensure that it has not slipped out of

plumb and that the mast is level (see Plumb the Mast on page 2-11).l Check the tightness of each nut and bolt. Tighten each to the torque spe-

cification listed in these instructions (see Torque the Nuts and Bolts on page 2-12).l Check the tightness of the guy wires. Each guy wire should be snug with slight

slack. Tighten or loosen the Gripple® connectors to adjust the slack (see Tightenthe Guy Cables on page 2-17).

l Check the lightning rod, ground rod, ground wire, and ground connections.Tighten any loose mounts or connections (see Install the Lightning Rod onpage 2-8, Install the Lightning Rod on page 2-8, and Install the Ground Wire onpage 2-18).

l If soils are corrosive, check the feet and stakes for corrosion. If substantial cor-rosion is evident replace the feet and/or stakes.

Every 6 Monthsl Look for corroded bolts, corroded welds, or other abnormalities. Replace dam-

aged hardware and take appropriate corrective measures if you observe any dam-aged or worn parts.


Section 3. Maintenance


Section 4.Tripod Accessories

The accessories are to secure sensors to the tripod or other instrument platform.

Gas Analyzer and Sonic Anemometer Mounting HardwarePart Number: 7900-340

Gas Analyzer Mount Kit: Includes crossover fitting, swivel mount, and riser bar,which are listed separately below.

Part Number: 7900-034

Crossover Fitting: Offset Cross, ¾" × 1" IPS, Pipe OD: 26 mm (1.05") × 33 mm(1.315"). Used to secure Gill WindMaster™, WindMaster™ Pro, or R3 Sonic Anem-ometers to the tripod cross arm.


Riser Bar: ¾" IPS, 56 cm (22") long, OD: 26 mm (1.05"). Used to adjust vertical pos-ition of the gas analyzer.


Swivel Mount: ¾" Cross w/ ¾" Swivel IPS, Pipe OD: 26 mm (1.05"). Used to adjustvertical orientation of the gas analyzer.


Section 4. Tripod Accessories

Cross Arm KitPart Number: 7900-330

Cross Arm and Mounting Kit: Includes a 1.5 m (59") cross arm and mountinghardware, listed separately below.


Mounting Hardware: Two 3.3 cm M8 U-bolts; two 6 cm M8 U-bolts; eight 13 mmM8 nuts; eight 24 mm M8 flat washers; eight M8 lock washers; Stainless Steel.


Mounting Plate: Anodized aluminum plate; 163 mm × 104 mm (6.4" × 4.1"); 6.35mm (0.25").

Stainless Steel Brackets: Lock pipe to U-bolts (part number 9879-043).

Light Sensor and Radiometer MountPart Number: 7900-350

The light sensor and radiometer mount is to attach to two light sensor mountingand leveling fixtures (part number 2003S) and a net radiometer to the tripod crossarm.


Appendix A.Specifications

TripodLoad Capacity: 135 kg (297 lbs)Maximum Load Area: 2.19 m2 (23.58 ft2)Base Diameter: 2.54 m (8 ft 4 in)Mast Outer Diameter: 6.03 cm (2.375 in)Weight: 50 kg (110 lbs)Maximum Slope: 13.0°Maximum Wind Gust (3 seconds)1: 161 kph (100 mph)

Upper MastMaterials: 2 inch Iron Pipe Size Schedule 40 Aluminum Pipe 6061-T6Outer diameter: 6 cm (2.375 inches)

Cross ArmMaterials: 1 inch Iron Pipe Size Schedule 80 Aluminum Pipe 6061-T6Outer diameter: 3.3 cm (1.315 inches)Length: 1.5 m (59 inches)

1When anchored in recommended soil conditions. See Soil Conditions on page 1-5.

A-1Heavy Duty Adjustable Tripod

Appendix A. Specifications

A-2 Heavy Duty Adjustable Tripod

A-1Heavy Duty Adjustable Tripod

Appendix B.Warranty

Each LI-COR, Inc. instrument is warranted by LI-COR, Inc. to be free from defectsin material and workmanship; however, LI-COR, Inc.'s sole obligation under thiswarranty shall be to repair or replace any part of the instrument which LI-COR,Inc.'s examination discloses to have been defective in material or workmanshipwithout charge and only under the following conditions, which are:

1 The defects are called to the attention of LI-COR, Inc. in Lincoln, Nebraska, in writing within oneyear after the shipping date of the instrument.

2 The instrument has not been maintained, repaired or altered by anyone who was not approved byLI-COR, Inc.

3 The instrument was used in the normal, proper and ordinary manner and has not been abused,altered, misused, neglected, involved in an accident or damaged by act of God or other casualty.

4 The purchaser, whether it is a DISTRIBUTOR or direct customer of LI-COR or a DISTRIBUTOR'S cus-tomer, packs and ships or delivers the instrument to LI-COR, Inc. at LI-COR Inc.'s factory in Lincoln,Nebraska, U.S.A. within 30 days after LI-COR, Inc. has received written notice of the defect.Unless other arrangements have been made in writing, transportation to LI-COR, Inc. (by air unlessotherwise authorized by LI-COR, Inc.) is at customer expense.

5 No-charge repair parts may be sent at LI-COR, Inc.'s sole discretion to the purchaser for install-ation by purchaser.

6 LI-COR, Inc.'s liability is limited to repair or replace any part of the instrument without charge ifLI-COR, Inc.'s examination disclosed that part to have been defective in material or workmanship.

There are no warranties, express or implied, including but not limited to anyimplied warranty of merchantability of fitness for a particular purpose onunderwater cables or on expendables such as batteries, lamps, thermocouples,and calibrations.

Appendix B. Warranty

Other than the obligation of LI-COR, Inc. expressly set forth herein, LI-COR,Inc. disclaims all warranties of merchantability or fitness for a particular pur-pose. The foregoing constitutes LI-COR, Inc.'s sole obligation and liability withrespect to damages resulting from the use or performance of the instrumentand in no event shall LI-COR, Inc. or its representatives be liable for damagesbeyond the price paid for the instrument, or for direct, incidental or con-sequential damages.

The laws of some locations may not allow the exclusion or limitation on impliedwarranties or on incidental or consequential damaged, so the limitations herein maynot apply directly. This warranty gives you specific legal rights, and you may alreadyhave other rights which vary from state to state. All warranties that apply, whetherincluded by this contract or by law, are limited to the time period of this warrantywhich is a twelve-month period commencing from the date the instrument isshipped to a user who is a customer or eighteen months from the date of shipmentto LI-COR, Inc.'s authorized distributor, whichever is earlier.

This warranty supersedes all warranties for products purchased prior to June 1, 1984,unless this warranty is later superseded. To the extent not superseded by the terms ofany extended warranty, the terms and conditions of LI-COR’s Warranty still apply.

DISTRIBUTOR or the DISTRIBUTOR's customers may ship the instruments dir-ectly to LI-COR if they are unable to repair the instrument themselves even thoughthe DISTRIBUTOR has been approved for making such repairs and has agreed withthe customer to make such repairs as covered by this limited warranty.

Further information concerning this warranty may be obtained by writing or tele-phoning Warranty manager at LI-COR, Inc.

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LI-COR Biosciences4647 Superior StreetLincoln, Nebraska 68504Phone: +1-402-467-3576Toll free: 800-447-3576 (U.S. and Canada)[email protected]

Regional Offices

LI-COR Biosciences GmbHSiemensstraße 25A61352 Bad HomburgGermanyPhone: +49 (0) 6172 17 17 [email protected]

LI-COR Biosciences UK Ltd.St. John’s Innovation CentreCowley RoadCambridgeCB4 0WSUnited KingdomPhone: +44 (0) 1223 [email protected]

LI-COR Distributor Network:www.licor.com/envdistributors

988-12678 • 09/2021

li-cor 7900-300 heavy duty adjustable tripod

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