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On the Yield Test Calculation Details screen, press “Default PAR”, and a key board
screen will appear. “Default PAR” can be set from Zero to 2465 :mols. OSI makes no
claims about the accuracy of “Default PAR” values. The actual value should be read with
an independent PAR meter at the leaf plane and leaf angle. When “Default PAR” is used,
all measurements of ETR appear using the setting selected. When a PAR clip is
connected to the OS1p, the “Default PAR” setting is automatically deactivated.
Default PAR can be used even when Pre-actinic illumination is not used. In this case,
when ambient illumination is used, all ETR values and PAR values found in the
measuring file will reflect the preset “Default PAR” value selected.
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