1. Install the 6400-17 or 6400-24 Chamber as per the
instructions included with the chamber.
2. Remove the 4 Phillips head screws on the bottom of
the RGB Light Source. Make sure that there is a
Propafilm covering over the aperture on top of the
chamber top plate. With the Propafilm facing the
bottom of the RGB Light Source, attach the chamber
top plate to the bottom of the light source using the 4
Phillips head screws (Figure 1).
3. Connect one end of the gray control cable to the
Control connector on the side of the light source, and
the other end to the 37-pin Auxiliary connector on the
LI-6400/LI-6400XT console (Figure 2).
4. Connect one end of the power supply cable to the light
source. Connect the power supply to mains power
(Figure 2). When first plugged in, the RGB light
source cooling fan may run momentarily; this is
normal. The power supply will automatically adjust
for varying voltage inputs (100-240VAC, 1.4A max.,
50-60 Hz). The power supply can be attached to the
LI-6400/LI-6400XT console using the supplied Velcro
kit, if desired (Figure 3).
The 6400-18A RGB Light Source is designed to be used
with the 6400-17 Whole Plant Arabidopsis (WPA) Cham-
ber, the 6400-24 Bryophyte Chamber, or with the
LI-6400XT and any clear-topped chamber. The LED
calibration is retained in the light source, making it
possible to switch from instrument to instrument without
the need to enter calibration constants. The red, green and
blue LEDs can be independently adjusted to allow users to
select any desired color combination. Photosynthetic
response differs with illumination wavelength, and is
explained in more detail in Application Note 5.
The assembly requires a Phillips head screwdriver, and
takes about 15 minutes to complete.
■Follow these steps to install the 6400-18A:
6400-18A RGB Light Source
Continued on next page
Installation and Operational Instructions
PPS-258
Figure 2. Connect the gray control cable to the LI-6400/LI-6400XT
console, and the power cable to the AC power supply.
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LI-6400 Portable Photosynthesis System
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6400-18A
AC Power Supply
To Mains Power
+15V4.8A
Figure 1. Attach the chamber top plate to the bottom of the RGB
Light Source using 4 Phillips head screws.
