optris CompactPlus Connect Operator's Manual page 33

CTratio
The middle figure shows the transmission of diode
1 relative to the transmission of diode 2
The blue points are the recorded measuring points.
Green curve: Regression curve (polynomial) for
calculating the values between the measuring
points.
Note
The Smart Ratio method can only work if there is a monotonically increasing function progression. If
this is not the case, the Smart Ratio method cannot be used. If this is not the case, repeat the
measurement and check the measurement for measurement errors.
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