Measurement Computing WavePort 312P rev.1.0 - Manual (Page 69)

PowerVista/312 User’s Manual Event Capture 9-1
9 Event Capture
9.1 Event Capture Overview
Event Capture continuously monitors all hardware channels and captures sub-cycle events while continuously
logging demand information. Events are triggered via user specified trigger thresholds, and demand information
is logged at a user supplied demand interval. During the demand interval, all cycles are analyzed so that the min,
max and average values are saved over the interval. Event Capture is a full-function, power quality meter in
software.
Data analysis includes:
• Events captured on all channels and calculated neutral current for a trigger on any other.
• Sampling of 128 points per cycle.
• Maximum event length of 28800 points (3.75 seconds at 60 Hz).
• Capture of all events to database file on hard drive.
• Triggers: Peak.
RMS minimum excursion.
RMS maximum excursion.
RMS delt or change.
Slope.
THD.
Extra voltage zero crosses.
• Specified number of maximum events logged.
• User definable number of post trig cycles.
• A monitor and no capture mode to verify proper trigger settings.
• Demand interval specified in hours, minutes and seconds.
• User definable demand window size.
• Four definable monitored harmonics plus THD.
9.2 Event Capture Configuration
The Event Capture configuration gives the user access to several display and capture features. All critical
information necessary for proper Event Capture and Demand Logging is accessed here.
Items in Critical Configuration:
• Peak Triggers and Status
• RMS Max Triggers and Status
• RMS Min Triggers and Status
• RMS Delt Triggers and Status
• Slope Triggers and Status
• THD Triggers and Status
• Zero Cross Triggers and Status
• Max Events
• Post Trig Cycles
• Demd Interval
• Demd Buffer
• Demd Harm 1
• Demd Harm 2
• Demd Harm 3
• Demd Harm 4