CHAPTER 7 THE MODE-MENU
Function for adjustment of leaf
temperature-reading with optional Leaf-
Clip Holder 2030-B. The adjustment via TEMP-GAIN should be
carried out after a preceding adjustment by TEMP-OFFS (menu
point 42) at a different temperature, such that the slope in the
temperature response curve can be evaluated. For highest accurracy,
TEMP-OFFS then may have to be adjusted once more (menu point
42).
43:TEMP.GAIN:1.00 (SET)
F: 448 745Y 6.2E 20L
Display of present zero offset value which
normally is identical to the value obtained
automatically via AUTO-ZERO (menu point 2). Following SET, this
value can be manually modified using the arrow-keys.
44: ZERO-OFFS: 20(SET)
F: 448 745Y 6.2E 20L
Display of current factor applied for
calculation of relative electron transport
rate (ETR) which for a standard leaf is defined as follows:
45: ETR-FAC: 0.84 (SET)
F: 448 745Y 6.2E 20L
ETR = Yield x PAR x 0.5 x 0.84
The standard factor 0.84 corresponds to the fraction of incident light
absorbed by a leaf. The preset value, which corresponds to an
average observed with a variety of leaf species, can be modified via
SET and the arrow-keys.
Setting of the width of saturating light
pulses for YIELD-determination. The
setting can be changed between 0.4 and 3.0 s in 0.2 s steps.
46: SAT-WIDTH:0.8s(SET)
F: 448 745Y 6.2E 20L
Setting of saturation pulse intensity for
YIELD-determination. Settings can be
changed between 0 and 12.
47: SAT-INT: 8 (SET)
F: 448 745Y 6.2E 20L
Setting of electronic signal damping. The
three settings correspond to the following
48: DAMP: 2 (SET)
F: 448 745Y 6.2E 20L
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