PMI Eagle 220, Руководство пользователя

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What the Eagle™ Records
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Figure 18 – Event Change Table Report
Trigger Logic
Event change triggering involves three parameters. The first, the
nominal voltage, sets a baseline voltage level. This is not the
same nominal voltage selected by the abnormal voltage record
type during the two-minute countdown.
The event change nominal voltage is specified by the user, and is
not picked by the Eagle. The second parameter is the threshold,
in volts.
The threshold is added and subtracted to the nominal to form
voltage trip points. These trip points are created all the way down
to zero volts and up to the maximum recorder voltage by using
multiples of the threshold voltage. For example, a nominal voltage
of 120V and a threshold of 6V would create trip points at 102V,
108V, 114V, 126V, 132V, 138V, etc.
The voltage region around the nominal voltage, but before any trip
points (115V to 125V in the above example) is called the nominal
band. If the voltage moves from the nominal band to cross a trip
point, an event change is triggered.