82
Please Note: Before you start monitoring, verify that ATPOL II's wall-charger is charging the internal
batteries. The internal batteries won't operate ATPOL II for extended hours without assistance. Verify
that the red charging indicator light is shining through its hole near the DC input jack.
Transient Event Log
The transient event log is a compact text file. It contains the
basic transient event information:
Timestamp
Signal affected
Peak value
Duration.
The
“timestamp” records the date and the time that the event
began, to the nearest microsecond. The
“signal affected” is
simply the name of the signal that had was triggered, such as
“V
1N
”. The “peak value” is the highest (or lowest) instantaneous value that was reached. The
“duration” is how long, in milliseconds, the event lasted, starting with the moment when the signal
exceeded the trigger threshold and ending when the transient returned below the trigger level.
The placement of magnitude vs. calendar timeframe allows spotting times of day that
events occur, and noticing if events are of similar magnitudes. To view transient
magnitude vs. time, click on the magnitude icon. To view transient duration vs. time, click
on the duration icon.
Transient Event Waveforms
Transient event waveforms are detailed records of the waveform of
a transient event. They last 50 msec, starting one cycle before the
transient event occurred. These files are very data intensive and
therefore a limited number of them should be recorded.
The waveforms can be graphed in order to better understand the
transient event. Important information is at the top. The signal
name, the timestamp of when the transient threshold was reached,
the width of the transient, and the peak value of the transient
(either in absolute terms or in relative terms to the underlying
periodic waveform, depending on which threshold was triggered)
are listed. In addition, moving the cursor over the graph results in
the instantaneous voltage (or current) of that point being displayed
in the heading. Whatever is seen can be zoomed-in on and can be
printed.
Summary of Contents for ATPOL II
Page 109: ...109...
