Siemens 9810 Series, Руководство пользователя, Страница: 155 / 218

Power quality
Extended waveform capture
The meter’s Waveform Recorder modules support extended waveform capture.
The Waveform Recorder module’s Pre-trigger Records setup register specifies
how many pre-event records are saved with each triggered recording. The Post-
trigger Records setup register specifies how many post-event records are saved
with each triggered recording.
Both Pre-trigger Records and Post-trigger Records are set to zero by default. To
configure the waveform recorder for extended waveform capture, either or both of
these setup registers must be set to a non-zero positive integer value. If you do
this, you must also set the
Record Delay Cycles setup register to zero in order to
properly configure the extended waveform capture.
A Waveform recording triggered
B Waveform record captured at trigger
C Pre-trigger waveform records captured
D Post-trigger waveform records captured
The waveform log set for each triggered recording is equal to the sum of Pre-
trigger Records + Post-trigger Records + 1 (where 1 is the actual record when the
Waveform Recorder module’s Record input was triggered).
For example, if Pre-trigger Records is set to 2 and Post-trigger Records is set to 6,
the number of records for each waveform log set is 9:
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