Hioki 3197, Инструкция по эксплуатации

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6.3 Viewing Anomalous Phenomena (EVENT screen)
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Detection Methods and Recording Contents of Events
Rms voltage (Urms1/2)
(use to detect voltage swells, voltage dips and interruptions)
• Calculation Method
Rms voltage (Urms 1/2) is calculated separately
for three channels at every half cycle.
Voltage Swell
• Detection Method
Detect Using Urms 1/2.
Set the threshold as a percentage of nominal volt-
age.
When the rms voltage rises above the positive
threshold, it is detected as an “EVENT IN (on
set)" event. Subsequently, when the voltage falls
back below the threshold (minus appropriate hys-
teresis), it is detected as an “EVENT OUT (recov-
ery)" event.
• Recording Contents
Event list data, voltage/corrent waveforms, event
voltage fluctuation graph
• Event Data Format
EVENT IN (On set): Event no., occurrence date,
occurrence time, event type, channel and IN
EVENT OUT (Recovery): Event no., occurrence
date, occurrence time, event type, channel, OUT,
maximum voltage and continuation period
• Event Voltage Fluctuation Graph
Fluctuation graph of Urms from about 0.5 sec-
onds before detection to about 2.5 seconds after
detection