Hioki ST4030, Instruction Manual

Page: 83 / 256

75
Discharge Judgments (When Incorporating Model ST9000)
Deviation threshold value of the test waveform discharge amount
When the judgment method is [AUTO]
(Measurement screen) [MODE] > [SETTING] > [JUDGE] > [DISCHARGE]
2
1
1
Tap [LIMIT] .
2
Enter the deviation threshold value of the test waveform discharge amount.
Setting range: 3
σ
to 100
σ
(resolution: 1)

Increases by 1.

Decreases by 1.
C Sets to the default values.
OFF Discharge amount operations are implemented, but judgments are not.
IMPORTANT
• Individual points’ high-frequency components are standardized using the standard deviation of the entire
waveform’s high-frequency component and converted to deviations. This process makes it unnecessary to
set thresholds for most workpieces.
• In the absence of any discharges, the deviation for the points will fall within a fixed area.
• In the event of a discharge, the magnitude of the high-frequency component will increase during the
discharge, causing the deviation for that point to increase.
• The instrument automatically corrects internally for a certain amount of variation in workpiece L values and
applied voltages.
• If a different type of workpiece is measured, or if the waveform changes for another reason, for example
due to a short-circuit in the workpiece, the instrument may detect a discharge even though no discharge
has occurred.
5
Setting Judgment Conditions