Hioki ST5680, Instruction Manual, Page: 100 / 253

100
Gradual Voltage Rise Test
Measurement details
The following information is displayed for a gradual voltage rise test.
• Dielectric breakdown voltage: Highest voltage at which no dielectric breakdown occurs in the
test piece for the specified holding time
• Dielectric breakdown strength: Value obtained by dividing the dielectric breakdown voltage by
the distance between two electrodes used for a test
• The median, average, and standard deviation over the number of all tests for the dielectric
breakdown voltage and dielectric breakdown strength
Number of times used for
calculation
(Number of dielectric
breakdowns)
NUM + GRAPH (measured value + waveform/
graph, small) display
NUM (measured value only) display
Dielectric breakdown voltage and
dielectric breakdown strength
(Median, average, and standard
deviation of all tests)
Test result by the number
of tests for the dielectric
breakdown voltage and
dielectric breakdown strength
Number of all tests
In the NUM display, the test result by the number of tests for the dielectric breakdown voltage and
dielectric breakdown strength can be displayed.
For information on how to switch the measurement screen, see “8.1 Waveform Graph Display”
(p. 101).
IMPORTANT
When the voltage hold time of each phase is set to TRIG, the voltage rise timing may be shifted
with respect to the measurement timing. Thus, the voltage rise time may appear at 200 ms in the
graph display (TREND), but the actual voltage rise time is 100 ms.
When you switch to the waveform display (WAVE), you can confirm that the voltage rise time is
100 ms.
Starting a test
See “Starting a test” (p. 59).
Stopping a test
See “Stopping a test” (p. 63).
Ending a test
See “Ending a test” (p. 63).
HIOKI ST5680A961-00