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The Multi-flash option may be turned on or off in the Y(II) Protocol by pressing the
second window down from the top on the left had side of the Y(II) measuring screen.
Y(II) Measuring Screen
Under “Fm’ Measure” select “Step Int Lin Regr”. For using the standard single saturation pulse
method select “
Standard”.
Y(II) Measuring Screen Y(II) Test Setup Screen
Far red light
Far red light can be used with the internal illuminator for the Y(II) test to allow the
continued reduction of PSI and the re-oxidation PSII. Options are offered for off, on, and
pre. “Off” turns the far red light off during the test. The “Pre” setting allows illumination
of the sample with far red light before the test, and the “On” position keeps the far red
light on during the test. Intensity is again adjustable between 5% and 100% with 5%
increments. The duration setting is used with the pre setting to allow pre illumination
with far red light from one second to sixty seconds. Sun light contains far red light, but
the LED actinic light source filters out far red light when used as a pre-actinic source.
Y(II) Test
Calculation Details
Screens
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