7.5 Displaying Flicker Values in Graph and List Form
135
Chapter 7 Monitoring Fluctuations in Measured Values
(TIME PLOT Screen)
7
This section describes how to display a ΔV10 flicker fluctuation graph.
ΔV10 flicker reference voltage
In ΔV10 flicker measurement, the reference voltage is automatically set internally using AGC (automatic
gain control).
Once the fluctuating voltage value has stabiliz
ed, the reference voltage is automatically changed to that
value. Consequently, there is no need to switch supply voltage settings as with conventional ΔV10 flicker
me
ters.
Example:
Fluctuating voltage: Stabilizes at 96 V
rms The reference voltage is automatically changed to 96 V rms.
Fluctuating voltage: Stabilizes at 102 V rms
The reference voltage is automatically changed to 102 V rms.
Due to the influence of the hig
h pass filter used in ΔV10 flicker measurement, measured values are
unstable when starting ΔV10 measurement immediately after settings have been configured, and the first
an
d second ΔV10 measured values may be excessively high. It is r
ecommended to wait about 5 minutes
after making settings on the [SYSTEM] screen before starting measurement.
Displaying a ΔV10 flicker fluctuation graph
[TIME PLOT]
screen
[Flicker]
[Graph]
Select with the F key.
To enlarge or reduce the graph (p.136)
To read the value above the cursor (p.137)
To scroll waveform data (p.137)
1
• The graph is updated once a minute, regardless of the TIME PLOT interval set in [SYS-
TEM]-DF1 [
Record]-F1 [Interval].
• The graph is not displayed unless [Flicke
r] is set to [ΔV 10] in [SYSTEM]-DF1 [Main]-
F2 [Measure2].
• ΔV10 flicker can be measured simultaneously for the voltage channels U1, U2,
and U3
(depends on connection).
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