Gfs-3000 Manual ((full)) -

Contains the CO2 and H2O infrared gas analyzers (IRGA), flow control, and computer system. Standard Measuring Cuvette (3010-S):

Many users forget this. The external quantum sensor (the light meter) drifts over time. The manual instructs you to use a reference PAR sensor (like a LI‑190R) placed directly next to the GFS-3000’s sensor. Adjust the "User Factor" in the System > PAR menu until both sensors match. gfs-3000 manual