Change Trigger Settings (Fraction Collector II Timetable)

The following trigger settings are available in the timetable:

Trigger source	Click the down-arrow and select the trigger source from the drop-down list.
Peak Detection Mode	Click the down-arrow and select the peak detection mode from the drop-down list. You can select from: Slope Detects peaks based on slope values only. Threshold Detects peaks based on threshold values only. Threshold and Slope Detects peaks based on both threshold and slope values.
Threshold	The height of the peak that triggers collection
Up Slope	The slope of the rising peak. The slope value is based on the first derivative of the signal.
Down Slope	The slope of the falling peak. The slope value is based on the first derivative of the signal.
Upper Threshold	A maximum peak height threshold that is used until the slope values are applied. This ensures that collection continues even for a saturated signal that might be expected to switch collection off. The value of the Upper Threshold must be greater than that of the Threshold.
Maximum Peak Duration Mode	Click the down-arrow and select the mode from the drop-down list. You can select from: No Timeout The peak duration has no limit. Use Max Peak Duration The peak has a maximum duration, set in the Maximum Peak Duration field.
Maximum Peak Duration	The maximum amount of time a peak trigger remains active.