(6400_Manual_Using the 6400XT_v6.2.pdf)
**CURRENT VERSION** Using the LI-6400/XT. Instruction manual for the LI-6400XT Portable Photosynthesis System, instruments running software version 6.2.x and above.
Using the LI-6400, Software version 5
(6400_Manual_Using the 6400XT_v5.3.pdf)
Instruction manul for the LI-6400 Portable Photosynthesis System, instruments running software version 5.3.
Using the LI-6400, Software version 4
(6400_Manual_Using the LI-6400_v4.pdf)
Instruction manual for the LI-6400 Portable Photosynthesis System, instruments running software version 4.