CHAPTER 7 THE MODE-MENU
Note: The MEMORY-front is identical to the MEM-number under
which the last data set was stored. It advances by 1 with each
following YIELD-determination.
Command to erase all data accumulated in
MEMORY. For safety's sake this command
is not yet carried out by SET but requires confirmation by pressing
the ∧-key. Then the MEMORY-front is reset to 0 and the data set
recorded with the next saturation pulse will be in MEM position 1.
39: CLEAR MEMORY (SET)
F: 448 745Y 6.2E 20L
Function for adjustment of PAR-reading
by comparison with calibrated device.
Particular care must be taken that both sensors are exposed to the
same photon flux density. After SET, the PAR-reading (L) can be
adjusted by the arrow-keys in steps of 1 µmol quanta m
-2
s
-1
. For
proper calibration over a wide range of PAR also adjustment of
LIGHT-GAIN (menu point 41) may be required. This can be checked
by comparison with calibrated device at a different PAR-value.
40: LIGHT-OFFS: 20(SET)
F: 448 745Y 6.2E 20L
Function for adjustment of PAR-reading.
The adjustment via LIGHT-GAIN should
be carried out after
a preceding adjustment by LIGHT-OFFS (menu
point 40) at a different light intensity
, such that the slope of the
response curve can be evaluated. For highest accuracy, the LIGHT-
OFFS then may have to be adjusted once more (menu point 40).
41:LIGHT-GAIN:1.00(SET)
F: 448 745Y 6.2E 20L
Function for adjustment of leaf
temperature-reading with optional Leaf-
Clip Holder 2030-B in comparison with calibrated device. After SET,
the temperature reading can be adjusted by the arrow-keys in 0.1 °C
steps. For proper calibration over a wide temperature range also
adjustment of TEMP-GAIN (menu point 43) may be required. This
can be checked by comparison with a calibrated device at different
temperatures.
42:TEMP.OFFS: 0.0(SET)
F: 448 745Y 6.2E 20L
26
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