LI-COR LI-6400, Manual

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Calibration Issues
6400-02(B) LED Source
Using the LI-6400 18-25
The program turns on the light source and, if it wasnÕt already on, waits for
60 seconds for it to warm up (Figure 18-18).
The program then goes through a series of command voltages (50, 100, 1000,
3000, and 5000 mV), at each waiting for 10 seconds then recording the
QNTM value (PAR in µmol m
-2
s
-1
) (Figure 18-19).
This program generates data for the
Õfirst guessÕ of the LED Source
control algorithm, and need only be
run if lamp control seems slow.
OK to Continue? (Y/N)
LED Source Calibration
Figure 18-17. The LED Source CalibrationÕs opening screen pro-
vides a fail-safe in case you blunder into it while doing some other
experiment that you donÕt want interrupted.
SetPt: 1000 mV
QNTM: 501 µmol/m2/s
Remaining: 32
LED Source WarmUp
earlyOK Abort
Figure 18-18. Waiting for the light source to warm up.Wait for the
QNTM number to stabilize, then press
earlyOK
. Otherwise, it will
wait 1 minute, then proceed anyway.