Affinity
2.0
Additional Information Page 273
3.6.9 Comparing Curves
The HIT440 also allows for comparing either two historical curves (e.g. two OSPL90 curves) or comparing a
historical curve to a currently recorded curve. This is done following the procedure described below:
1) Find the first curve in the Session list. Historical HIT measures are listed by date and time of
saving.
2) Press Toggle between lock and unlock the selected session
3) Find the second curve in the Session list. This can be either a curve of the current session or a
historical curve.
The two curves are now shown in an overlap view as illustrated below:
Note: To avoid comparing apples to oranges, only curves of the same type can be compared – hence it is
not possible to compare results from an ANSI based test protocol with curves acquired with an IEC or
Custom based test protocol. Ideally the same test protocol should be used for this type of comparison.
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