11
Measurements are taken by pressing the
READ
button. The turf color data, in
the currently selected mode (see be-
low), will be displayed on the top line
of the LCD.
The reading is also incorporated into the running average
(
AVG
) and the sample number (
N
) is incremented. The
current
AVG
and
N
are both displayed on the bottom line
of the LCD. Up to 64
RED/NIR
readings (
N064
) can be
included in the running
AVG
. If more than 64 readings
are taken before the data series is cleared or the meter is
turned off, the meter will display “
AVG=- - -
”. See Stan-
dard Reading Mode (p. 12) for more details.
Read
The
MODE
key selects which of three
data formats will be displayed on the
LCD. The mode can be changed after a
measurement to view measurement val-
ues in different formats. The TCM500
has three display modes; RED/NIR, NDVI, and Grass In-
dex. See Meter Indexes (p. 18)
NDVI
The equation for NDVI computation is shown on p. 18.
Grass Index
The meter uses the reflectance values to compute a grass
index (see p. 18)
RED/NIR
Displays the % reflectance in the RED (660 nm) and NIR
(850 nm) wavelength bands.
MODE
RED/NIR = 17.1/ 60.5%
N002 Av = 15.1/ 62.3%
NDVI = .462
N022 Av = .501
Grass Index=3.60
N010 Av=4.10
