Vitrek Xitron 2801, User Manual

Page: 97 / 182

Display Screens 97
DC
FUNDAMENTAL
PERCENT THD
PEAK
PEAK AC
Inrush Charts
The Inrush chart maintains a record of the actual current and voltage
waveforms from a time nominally 3ms prior to the detection of an Inrush
current and/or by the turning on of the internal line switch (depending on
configuration) to nominally 65ms afterwards. Data is viewable with a typical
time resolution of 4.1 microseconds.
The Inrush chart is not capable of capturing data during a change in range. In
order for an Inrush chart to be produced, the user must ensure that no ranges
occur during this period of time.
Figure 62. Range Change
The date/time at which the chart was started is saved as the reference
date/time for Inrush charts (note that this is the same reference date/time as
for the startup chart).
The Inrush chart format, the x-axis in Normal viewing mode is sufficient to
cover the nominal 68ms inrush event, which cannot change while data is
being collected. Note that the left end of the scale is fixed in time relative to
the time of the inrush event and all data is placed in accordance with age
relative to that time. For the Inrush chart Y-axis, the center value will always
be zero, and thus the upper and lower data will always be of the same value
but with opposite polarities.