Four-Quadrant Diagram; Mechanism For Triggering Transient Sensors - AEMC 8335 Power Pad User Manual

Four-Quadrant Diagram

This diagram is used as part of measuring power and energy (see § 5.6)

Mechanism for triggering transient sensors

The sample rate is a constant value equivalent to 256 samples per cycle. When
a transient search is launched, each sample is compared to the sample from the
preceding cycle. The preceding cycle matches the middle of the tube; it is used as
a reference. As soon as a sample leaves the tube, the trigger event comes; repre-
sentation of the transient is then captured by the PowerPad
the event and the three following cycles are saved to memory.
Here is a graphical representation of the transient capture trigger mechanism:
Item Function
1 Reference period
2
Top of envelope
3 Cycle monitored
4
Bottom of envelope
Shop for AEMC products online at:
5 Triggering event
124
0
PowerMeterStore
www.
. The cycle preceding
®
.ca
Power Quality Analyzer Model 8335
1
2
3
4
5
1.877.766.5412