Hioki PW3198 User Manual

Appendix 3 Event Detection Methods
A
13
Appendix
See: For more information about how to record event waveforms: "Appendix 4 Recording TIMEPLOT Data and Event
Waveforms" (p.A14)
High-order Harmonic Voltage Component and High-order Harmonic Current
Component
Measurement method:
• The waveform obtained by eliminating the fundamental component is calculated using the true RMS method during
10 cycles (50 Hz), 12 cycles (60 Hz), or 80 cycles (400 Hz) of the fundamental wave. Events are detected when this
RMS value is greater than the threshold.
• When an event is detected, the high-order harmonic waveform is recorded in addition to the event waveform for 40
ms (8,000 points of data) from the end of the first approx. 200 ms aggregation interval in which the reading was
greater than the threshold.
Event IN and OUT:
Event IN : Start of the approx. 200 ms aggregation in which the reading is greater than the threshold
Event OUT : Start of the approx. 20 ms aggregation in which no high-order harmonics were detected during the first ap-
prox. 200 ms aggregation following the IN state
Approx. 200 ms aggregation
Threshold is given as an
RMS value.
Sampled waveform
200 kHz
for 40 m
Elimination of fundamental
component (2 kHz or less)
High-order harmonic component
waveform after elimination of
fundamental component
High-order harmonic component waveform (including fundamental component)
Timer Events
Events are generated at the set interval. When a timer is set as an event, the external event setting is forc-
ibly turned on. Once recording has started, timer events are recorded at a fixed interval (the set time) start-
ing with the start time.
Event recorded
Ext
Event recorded
Ext
Event recorded
Ext
Event recorded
Ext
Start of
recording
Interval Interval Interval Interval
External Events
External events are detected using external control terminal (EVENT IN) shorts or pulse signal falling edge input. The
voltage and current waveforms and measured values when the external event occurs can be recorded.
See:"11.1 Using the External Control Terminal" (p.149)
Manual Events
Manual events are detected when the MANU EVENT (manual event) key is pressed. The voltage and cur-
rent waveforms and measured values when the external event occurs can be recorded.

Hioki PW3198 Specifications

General

Brand	Hioki
Model	PW3198
Category	Measuring Instruments
Language	English