Check the voltage which can be applied to the circuit under test, and set the ranges
switch to the desired insulation resistance range.
Connect the Earth cord (black) to the Earth terminal of the circuit under test.
Put the tip of the line probe (red) to the circuit under test. Then press the “PRESS TO
TEST” button. The buzzer sounds intermittently during measurement.
The measured value will be displayed on the LCD, and it is automatically “HOLD”
displayed after measurement.
This instrument has an auto-discharge function. With the test leads connected to the
circuit under test, release the “PRESS TO TEST” button to discharge capacitance in the
circuit after test, LCD display flash “
“. Check that the indication
on the voltage monitor is “O V”
At any output voltage, when the tested resistance is less than 10MὨ, the testing time
cannot exceed 10 seconds continuously.
Danger
Do not touch the circuit under test immediately after testing. Capacitance stored in the
circuit may cause electric shock.
Leave test leads connected to the circuit and never touch the circuit until the discharge
is complete.
9.
Auto-discharge function (
)
This is a function to release capacitance stored in the circuit under test automatically
after testing.
Discharge condition LCD display flash “
“and can be checked with a
live voltage monitor is “OV”. This function will be release in 2sec or more after removing
test leads before discharge is complete. Set the range switch to “OFF”, and remove test
leads from the instrument.
10.
Principal of Insulation Resistance Measurement
Resistance value can be obtained by applying certainhigh
Voltage to the resistance (insulation resistance) and
Measuring the flowing current.
A.
Continuous Insulation Resistance Measurement
Caution
the high voltage symbol (
) along with a voltage monitor
display of >30V warns if voltage over 30V AC or DC is present. High voltage
inhibits the test. Insulation tests should only be performed on de-energized
circuits.
