Default Almen Saturation Point

**Almen
Saturation Curve Calculator 4.0**

Saturation
if generally defined as the point where doubling the exposure time results in an
arc height increase of not over 10%. Some definitions set this criteria as less
than 10%. It is also suggested that, in less critical applications, 20% is
acceptable. * Therefore, dependent on
customer specifications, saturation may be defined as the point where
doubling the exposure time results in an arc height increase of less than 10% to
less than or equal 20% - or any other applicable arbitrary value*.

Any specified point of saturation may be derived by changing the default settings as illustrated below.

**Default
Saturation:** **Less than 10% to less than
or equal 20%**

In this hypothetical
case consisting of a single data set of 4-points generated in 8 passes three
points of saturation are evaluated. This single data set is entered into three
runs with Run1** (Orange)** set at 10%, Run2

In all three runs, dividing T2 by T1 yields 2 - this complies to the "double" criteria. As well, dividing AH2 by AH1 yields the required 10%, 5% and 20%.