20
SYSTEM
This menu features eleven options:
• Calibration
Calibration will begin the calibration process (
). The external PAR sensor
) will be needed to complete calibration.
• Location
The location must be set to the appropriate country, city, latitude, and longitude prior to use
to make accurate LAI calculations (
Figure 23 Location screen
North latitudes are designated positive and south latitudes are negative; east longitudes
are positive and west longitudes negative.
• Date
The date must be changed prior to use to record accurate information (
). LP-80
uses the date provided to calculate
z
and
F
b
values. The date can also be changed in the
LP-80 Utility.
• Time
The time must be changed prior to use to record accurate information (
).
• Daylight Savings
Daylight savings must be toggled on or off prior to use to record accurate information
(
). LP-80 uses this parameter to calculate
z
and
F
b
values. When daylight savings
is on, the time will automatically adjust.
• Leaf Distribution
χ
This selection adjusts the leaf distribution parameter for the plant canopy to be measured.
Use
UP and DOWN to change the value of the
χ
parameter. Press
ENTER to save.
• External Sensor Constant
This selection adjusts the calibration constant of the external sensor (
). This
should only be changed when using a new or recently recalibrated external sensor. The
external sensor constant value should match the value on external sensor cable tag.
Use
UP and DOWN to set the correct value, and press ENTER to save.