Hioki PQ3198, Instruction Manual

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A
11
App
e
ndix
See: For more information about how to record event waveforms: "Appendix 4 Recording TIME PLOT Data and Event
Waveforms" (p.A12)
High-order Harmonic Voltage Component and High-order Harmonic Current
Component
Measurement method:
• The waveform consists of components having frequencies of 2 kHz to 80 kHz 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 (8000 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
Components lower than 2 kHz and
higher than 80 kHz eliminated
High-order harmonic component
waveform
High-order harmonic component waveform (including fundamental component)
Timer Events
Events are generated at the set interval.
Once recording has started, timer events are recorded at a fixed interval (the set time) starting 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.175)
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 PQ3198A961-03