
Chapter 5 Measurements and Calculations
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Automatic Calculation
Some items in the measurement menu are automatically calculated based on measurements of other
items.
■
HC
This is automatically calculated using the following formula, provided there are measured BPD and OFD
values.
Exception: when you use Merz reference,
■
AC
This is automatically calculated using the following formula, provided there are measured APD and TAD
values.
Exception: when you use Merz reference,
■
FTA
This is automatically calculated using the following formula, provided there are measured APD and TAD
values.
■
ThC
This is automatically calculated using the following formula, provided there are measured APTD and
TTD values.
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