KYORITSU 3127 - Manual (Page 19)

－ 16 －
To check the insulation of electric equipments or electric circuits, measure
their insulation resistances by using this instrument. Ensure to check the
appropriate voltages to be applied to the equipment under test before starting
a measurement.
Note)
●
KEW3127 may show unstable readings when the insulation resistance of the
equipment under test is not stable.
● Beep sound may be heard during insulation resistance measurement. But it
is not malfunction.
● It takes time to measure a capacitive load.
● At insulation resistance measurement, positive (+) voltage is outputted from
the Earth terminal and negative (-) voltage is outputted from the Line terminal.
Connect the Earth cord to the Earth (ground) terminal.
It is recommended to connect the positive(+) pole to the earth side when
measuring insulation resistance against the ground or when a part of the
equipment under test is earthed.
With this connection, smaller measured value can be obtained comparing
with other way round.
(1) Check the appropriate voltages to be applied to the circuit under test, and set
the Range switch to any desired insulation resistance range.
(2) Press the MODE button ( ) and select any of the following modes.
Mode Details
IR
PI/DAR
Performs normal insulation resistance measurements (consistent
measurements)
(Auto-measurement and display of PI and DAR. )
SV Increases the set voltage by 20% every time when pre-set time
comes.
DD Calculates dielectric discharge based on the measured capacitance
of the measured object and residual current values after testing.
RAMP Increases the preset voltage gradually to detect insulation failures.