LI-COR LAI-2200 User manual

LAI-2200 Plant Canopy Analyzer
Quick Start Guide
Install Batteries Display Brightness
Console: 4 AA batteries
Wand: 2 AA batteries, unless attached to console
LAI-2200
Plant Canopy Analyzer
OK
LOG
START
STOP
MENU EXIT
1 2 3
4 5 6
7 8 9
0. -
abc def
ghi jkl mno
pqrs tuv wxyz
X Y
1 2
Press and hold
the minus (-)
key, then...
Brighter
Dimmer
Cable Precautions
To attach: Align the red dots and press. Do not hang the instru-
ment from the cable.
Avoid sharp bends in the cable.
To release: Grasp the collar and pull.
Do not pull directly on the cable.
Do not drop onto the cable connections.
View Caps Sky Conditions
Always use the same view cap for associated
above- and below-canopy readings. Use the view-
restricting caps:
lTo block the sun from the sensor's view.
lTo block the operator from the sensor's view.
lWhen cloud cover is non-uniform.
lWhen there are gaps or clumps in the canopy.
lTo reduce the required plot size.
lTo make above-canopy measurements in a
small forest clearing.
Overcast Conditions
Sunrise or Sunset
lOptimum sky conditions are uniform overcast
or immediately before sunrise or after sunset.
lClear, partly cloudy, or other sky conditions
are suitable with proper sampling technique.
lThe worst sky conditions are under direct sun-
light. Refer to the LAI-2200 Instruction Manual
for more details.
®
Copyright LI-COR, Inc.
www.licor.com • 1-402-467-3576 • 2/21/2013 • 988-13397

Sampling Different Canopy Types
Small Plots
A
A
A
AA
B
B
B
B
B
Rep 1 Rep 2
Rep 3Rep 4
Row Crops
Rep 1
B
B
B
B
A
Rep 2
B
B
B
B
A
Rep 3
B
B
B
B
A
Rep 4
B
B
B
B
A
Homogenous Vegetation and Grasslands
Rep 2
A
B
B
B
B
Rep 3
B
B
B
B
A
Rep 1
A
B
B
B
B
Rep 4
A
B
B
B
B
Forests and Tall Canopies
A
B
B
B
B
45° or 90° cap: Above reading in a clearing >3.5x the height of canopy.
A
B
B
B
B
180° or 270° cap: Above reading in a clearing >7x the height of canopy.
A=Above-canopy readings. B=Below-canopy readings.
Each above-canopy reading should view the same region of the sky as the associated below-canopy readings.
One Wand Two Wands
1. Set Clock and Sync Time
a. Connect the cable between the
wand and console and power on
the console.
b. Press Menu > Console Setup.
c. Press OK, then select Set Time.
d. Set the time and press OK.
e. Press Menu > Wand Setup > Select
Wand > Clock > Sync Time > Yes >
OK.
2. Install a View Cap
3. Create a New File
a. Press the Start|Stop button.
b. Select New File and press OK.
c. Enter a File Name.
d. Set Prompts if desired and press OK.
4. Make an Above-Canopy Reading
a. Be sure the blue "Above" LED on the
wand is lit.
b. Hold the wand level.
c. In a clearing with an unobstructed
view of the sky, press "LOG."
5. Make the Below-Canopy Readings
a. Under the canopy, press the A|B but-
ton so the "Above" LED is off.
b. Hold the wand level below the can-
opy.
c. Press the LOG button to record the
below canopy readings.
6. Compute LAI
a. Press the Start|Stop button.
b. When prompted to compute LAI,
select YES.
1. Set Clock and Sync Time
a. Connect the cables between the
wands and console and power on the
console.
b. Press Menu > Console Setup.
c. Press OK, then select Set Time.
d. Set the time and press OK.
e. Select Wand Setup > Select Wand >
Clock > Sync Time > Yes > OK.
f. Repeat step 5 for the second wand.
2. Match the Sensors
a. Install the view caps. Be sure both
wands have the same size view cap,
oriented the same way.
b. Orient them to view the same sky.
c. Press Menu > Wand Setup > select a
wand > Match Values > Calculate
Values > OK. The selected wand will be
set to match the other wand. Press OK.
3. Set Autologging of Above-Canopy Read-
ings
a. Navigate to Menu > Wand Setup >
select the wand that will autolog >
Autolog.
b. Set the Start Time, Stop Time, and
Frequency of autologging.
c. Disconnect the wand from the console
and mount it to a tripod so it is view-
ing the desired part of the sky. Note
that the above-canopy readings
logged by this sensor must view the
same portion of the sky as the asso-
ciated below-canopy readings.
d. The LED will blink every 2.5 sec-
onds prior to the start time.
4. Log Below-Canopy Readings
a. With the second wand still con-
nected to the console, press the
Start|Stop button, select NEW
FILE and name it.
b. Set prompts if desired.
c. Be sure the "Above" LEDis off,
then record the below-canopy
readings.
5. Merge Readings from Sepearate
Files
a. Connect both wands to the con-
sole.
b. Navigate to Menu > Data >
Wand > Download > select
wand. Choose NEW FILE and
name the file.
c. Navigate to Menu > Data > Con-
sole Data and select the file
that has the above-canopy rec-
ords.
d. Select Edit > Import Obser-
vations > All. Select the desired
file and press OK.
6. Recompute LAI
a. Navigate to Menu > Data > Con-
sole > select the file > Recom-
pute. Choose Yes.
b. View the new LAI results under
Quick View or View menu
option.
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Using File Viewer 2200
FV2200 software can run on Windows®, Macintosh OS® X, and Linux operating systems. Refer to the LAI-2200
Instruction Manual for installation instructions. Basic FV2200 operations are described here.
USB Data Transfer
1. Connect the USBcable between the LAI-2200 console and your computer. The computer will recognize the
LAI-2200 as a mass storage device, similar to a USB memory stick.
2. Records are in the folder called LAI > Data. Copy them to a directory on your computer.
Note: The LAI-2200 may not be recognized if it is in logging mode, so be sure to exit logging mode. Or
power off the device when connecting to a computer.
Open LAI Files in FV2200 File Viewer
To open LAI files, simply drag them over the FV2200
icon. This will launch FV2200.
Or drag files directly over the FV2200 window.
Or open files directly using the Open button/menu item in FV2200: .
View File Details
Click the Display button and select variables from
the list to change the variables that are displayed:
Double click a file to view all values recorded in the
file:
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Merge Readings from Separate Files
If above- and below-canopy readings are in separate files, you will need to combine them to compute LAI.
Note that the combined files must have the same TransComp settings (canopy model, mask, etc.).
1. Open the files that are to be combined in
FV2200.
2. Click the Combine button.
3. Name the new file as desired.
4. In the Recompute dialog, specify the canopy
model that should be used to compute LAI.
5. View the new file with recomputed LAIvalues.
Graph Data
Add one or more charts. Select the files to chart and
click Add Chart:
Right click the chart to view chart options.
You can save the chart as a .pdf, print the chart, or
change chart settings.
Recompute LAI
Change Canopy Model: Select a different canopy
model and configure if needed:
lHorizontal: For typical homogenous canopies.
lIsolated Measured: For isolated plants. Meas-
urements of the path-lengths must be entered.
lIsolated Computed: For isolated plants. Path-
length measurements are computed. Azimuthal
asymmetry is allowed.
Change Mask: It may be desirable to omit a ring
(Change Mask) prior to computing LAI. For example,
if the field of view of the reference (Below canopy)
readings was not sufficiently wide, the outer ring
should be omitted.
Recompute Transmittance: Change the way
FV2200 computes transmittance.
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