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1. Turn the function knob to select one of test voltages 100V/250V/500V/1000V.
(1) Before testing insulation resistance, the circuit under test must be completely discharged and completely isolated from
power supply circuit.
(2) Insert the red test wire into the " LINE" input port and the black test wire into the "EARTH" input port.
(3) Connect the red and black alligator clip to the circuit under test. The voltage is output from the LINE port.
2. Continuous Measurement
After function knob is set to one of test voltages 100V/250V/500V/1000V, press the TEST key, the instrument will be self-
locked to measure continuously. The test voltage will be output and TEST button will light up. With the measurement finished,
press TEST button to unlock and stop the measurement.
Caution
• Make sure the tested circuit is de-energized before measurement. Do not measure the insulation of any energized equip-
ment or wire.
• After the measurement is completed, do not touch the circuit by your hand. The capacitance stored in the circuit can cause
electric shock.
• Do not touch test wires when they are disconnected from tested circuit, wait until the test voltage is completely discharged.
• In case the battery cover is opened, do not conduct any test.
8. Battery Replacement
Low Voltage Symbol
Please follow these steps to replace batteries:
(1) In order to avoid the risk of electric shock, firstly turn off the power source before replacing the battery (i.e. the function
knob points at OFF) and remove the test wires.
(2) Unscrew the screws on the cover of battery compartment and remove the battery compartment. Replace six batteries.
(3) After the batteries are replaced, ensure to fasten the screws.
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Battery Voltage
7V or less
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TM
TM
07/12/23
V1.0
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