General Overview - Spectrum Technologies Field Scout CM1000 Operation Manual

General Overview

The FIELD SCOUT CM1000
senses light at wavelengths of 700 nm and 840 nm to
estimate the quantity of chlorophyll in leaves.
ambient and reflected light at each wavelength is
measured. Chlorophyll a absorbs 700 nm light and, as a
result, the reflection of that wavelength from the leaf is
reduced compared to the reflected 840 nm light. Light
having a wavelength of 840 nm is unaffected by leaf
chlorophyll content and serves as an indication of how
much light is reflected due to leaf physical characteristics
such as the presence of a waxy or hairy leaf surface.
♦ Lasers define the target as the trigger is pressed. At a
distance of 11.2 inches (28.4 cm), the field of view is
0.434 inches (1.10 cm) in diameter. At a distance of
72 inches (183 cm), the field of view increases to 7.4
inches (18.8 cm) in diameter.
♦ A chlorophyll index value (0 - 999) is calculated from
the measured ambient and reflected light data.
♦ The number of samples taken and a running average
of chlorophyll index values is displayed.
♦ Ambient light level is displayed on a scale of 0 to 9.
♦ The optional data-logging system records the latitude
and longitude (if GPS is used), the sample number,
the individual chlorophyll index reading, and the
value assigned to the ambient light level.
♦ The recorded data is downloaded to your PC using
the optional Field Scout
♦ The data-logged files are comma-delimited text files
and can be opened and worked with in any
spreadsheet, graphing, statistical, or word processing
program.
4
Chlorophyll Meter
TM
TM
software.
The