FEASA LED ANALYSER LOW LIGHT
FUNCTIONAL VERSION
Step-by-Step approach to Testing a LED
Standard Capture Mode
To Test the Color and Intensity of up to 10 LEDs simultaneously carry out the following:
1. Ensure that the LEDs to be Tested are turned on and that the fibers are centered over the
LEDs.
2. To Test the Color and Intensity in
RGB
first send the command
capture
to the LED
Analyser. The LED Analyser will return the characters
OK
indicating that the Color and
Intensity data for the LEDs has been stored in the internal memory.
1. Transmit the command
getrgbi01
to retrieve the results for Fiber 1. Any fiber can be
queried by sending the command
getrgbi##
to the LED Analyser, where
##
is the fiber
number in the range
01 to 10
. The LED Analyser will return the results in the format
rrr
ggg
bbb
iiiiiE
where
rrr
,
ggg
and
bbb
are the
red
,
green
and
blue
components of the
light in decimal format in the range
000 to 255
. The
iiiii
value indicates the intensity
value of the light in the range
00000 to 99999
.
2. Alternatively, the Led Analyser may also be queried to retrieve the Hue, Saturation and
Intensity results for the LEDs under test. After step 2 send the command
gethsi##
to the
LED Analyser where
##
is the fiber number. The LED Analyser will return the results for
that fiber in the format
hhh.hh sss iiiiiE
where
hhh.hh
is the Hue,
sss
is the
Saturation(whiteness) and
iiiii
are the Intensity results for that Fiber.
3. When using the Capture or C command an Intensity value of 0000 will indicate that the
LED under test is not bright enough. An Intensity value of 99999 will indicate that the LED
is too bright and the LED Analyser has an over-range condition. Either increase the or
decrease the distance of the LED to the Fiber or increase/decrease the LED Intensity.
1. In general, try to keep the Intensity less than 80,000 and greater than 20,000.
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