ERL tesla lite, User Manual, Page: 66 / 288

7 Recorder Setup Utilities
7-6 TESLA LITE User Manual D03283R01.10
Duration Mode
Figure 7.5: Recorder Setup Utilities - Duration Recording
In Duration Recording, the duration of the trigger determines the record length.
The record stores the configured amount of pre-trigger data, continues to re-
cord while the trigger is active and then records a configured amount of post-
trigger data. If a trigger remains active, the TESLA LITE stops recording once
the Maximum Record Length limit is reached. If a subsequent trigger occurs
while a record is being created, it will be combined with the first trigger using
a logical OR operation as long as it is not near to the maximum record length
limit. If the trigger is processed near the end of the record, a new overlapping
record will be created instead of combining the triggers. Records with com-
bined High Speed and Low Speed data can only be combined during the High
Speed data capture portion of the record.
Duration Recording mode captures all the data during the fault trigger, but
tends to create larger records that may contain unimportant data.
To enable record auto-extension for multiple triggers, the Maximum
record Length must be larger than the Normal Record Length.
At least small amount of pre-trigger time is recommended to ensure
the triggering event is included in the records.