Hioki ST4030, Instruction Manual, Page: 81 / 256

73
Discharge Judgments (When Incorporating Model ST9000)
Discharge judgment methods [DISCHARGE]
(Measurement screen) [MODE] > [SETTING] > [JUDGE] > [DISCHARGE]
1
1
Tap [ENABLE] , and turn [ON] the discharge judgment methods.
OFF Disables the Discharge Detection Upgrade.
FIXED Compares the amount of the discharge component of the master waveform and the amount of
the discharge component of the test waveform.
AUTO Calculates variations in the high-frequency component that appears in test waveforms as the
standard deviation ( σ ). Discharges will be detected based on whether the deviation exceeds a
fixed amount due to a sudden increase in the high-frequency component due to discharge.
IMPORTANT
If the discharge judgment method is AUTO, suitable filtering is automatically selected according the the
response waveform of the conforming workpiece by implementing voltage calibration. The discharge
judgment method AUTO has a higher discharge judgment performance than FIXED, so normally make sure
to select the AUTO setting. If using a special workpiece that emits a greatly different response waveform
than normal, it may be difficult to render judgments when the discharge judgment method is AUTO. In such
cases, set the discharge judgment method to FIXED.
5
Setting Judgment Conditions