Hioki MR8847-51, Measurement Manual

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12
Monitor abnormal occurrences
Monitor abnormal occurrences
The following explains the recording method to record a voltage drop
including a voltage interruption.
Keep monitoring and save the measurement data automatically.
In this section, a voltage dip trigger is used to measure waveforms. The
following explains how to issue the trigger when an input signal from a
50-Hz commercial power falls from approximately 200 V rms (282.8 V
peak) to below 180 V rms (254.4 V peak).
Trigger level
1/2 cycle
T
1 Prepare for measurement
Required items:

MR8847A Memory HiCorder

8966 Analog Unit

L9198 Connection Cord

CF card
Refer to “Preparations for
Measurement” (p. 5)
Insert the CF card.
Connect the lead to the
measuring point.
Connect the power cord
to the power outlet.
Connect the lead to CH1.
2 Set the measurement conditions and trigger conditions
Configure the setting on the waveform screen as follows.
Displays the
waveform screen.
Displays the Channel
settings window.
(
[Analog]
sheet)
Displays the Trigger
settings window. ( [Analog
Trig] sheet)
Move the
cursor.
Select the items to be set.
1
2
3
1
2
Set the measurement conditions.
Voltage axis range
Set the voltage per one division
on the vertical axis.
Timebase
Set the time per 1 division on
the horizontal axis.
3
Set the trigger conditions.
Trigger type
Set to [Drop] .
Level
Set to [254.4 V] .
Frequency
Set the frequency
Trigger
Set to [Repeat] .
Pre-trigger
Set the ratio in %.
HIOKI MR8847G963-03