KYORITSU 3127 - Manual (Page 33)

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6-8 Ramp Measurement
Voltage used in Step voltage test is raised in steps but that used in Ramp
measurement is gradually raised. Therefore, Ramp measurement is useful to fi nd
the points of insulation failure without causing serious damages. This enables
you to locate a fault, such as pinholes in windings, by seeing a spark or a wisp of
smoke.
KEW3127 displays the breakdown voltage value when insulation breakdown
occurs in load.
* Breakdown mode
When a breakdown occurs, KEW3127 stops measurement and displays the
voltage which caused breakdown. When no breakdown is detected, voltage is
raised till it reaches to the preset voltage value.
* Burn mode
KEW3127 continues measurement, even if a breakdown is detected, until applying
voltage reaches to the preset value. Breakdown voltage will be displayed after a
measurement.
Note: Ensure that the object under test is completely discharged before performing
a Ramp measurement.
Resistance value
End of test:
Output current
Breakdown voltage
(Voltage value when breakdown
occurred.)
Time when
a test ends
Output voltage
Ramp measurement result
Breakdown mark
(Either following marks
blinks when breakdown
occurs.)
: Burn mode is set
： Breakdown mode is set.