KYORITSU 3126 - Manual (Page 15)

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6-2 Insulation resistance measurement
# DANGER
● Confirm that no electrical charge exists on the circuit under test
before measuring by using a high voltage detector.
● Put on a pair of insulated gloves for high voltage.
● In case the Range switch is set to Insulation resistance range,
high voltage is being applied to the tips of test leads and to
the circuit under test continuously while the Test button is kept
pressed down. Be extremely careful not to get electric shock.
● Do not start measurement with the battery cover removed.
● Never start measurement when thunder rumbling.
● Connect the Earth Cord (black) to the earth terminal of the
circuit under test.
● With the Range switch set to the Insulation resistance range,
live circuit warning symbol appears on the LCD and the audible
warning activates when a voltage of 30V or higher is measured.
KEW3126 doesn’t start a test, even the Test button is pressed
down, if the measuring voltage is 160V or higher: it starts a test
if the measuring voltage is under 160V upon a press of the Test
button. Prior to testing, ensure that the equipment under test is
disconnected from the mains supply and not energized in order
to avoid possible electrical hazards.
This instrument may start a measurement for energized electrical
circuits. Be extremely careful not to get electrical shock.
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)
● KEW3126 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.