Extech Instruments MG500 User Manual page 3

CAUTION! READ THE MANUAL
Follow the instructions in the Manual for every measurement type. Read and understand the
general instructions before attempting to use this instrument.
SAFETY CHECK
Before using the tester check the condition of the test leads.
The test leads must be free of cracks or any damages and must be insulated.
Always disconnect the test leads when changing the batteries
Always double check the lead connections before making any measurements. For increased
safety, use fused test leads (optional).
Do not touch exposed wiring, connections or other "live" parts of an electrical circuit. If in doubt,
check the circuit first for voltage before touching it.
THIS INSTRUMENT SHOULD ONLY BE USED BY COMPETENT, SUITABLY TRAINED
PERSONNEL.
CAUTION! RISK OF ELECTRIC SHOCK
CAUTION! READ THE MANUAL
Electricity can cause severe injuries even with low voltage or current. It is extremely important that
the following information be read before using this High Voltage Digital Insulation Meter.
This instrument must only be used and operated by competent trained personnel and in strict
accordance with the instructions and safety practices. Liability is not accepted for any damage or
injury caused by misuse or non-compliance with instructions and safety procedures.
This instrument must not be used on live circuits. Ensure all circuits are de-energized before
testing.
Never open this High Voltage Digital Insulation Meter except for battery replacement (See
Battery Replacement section).
Always inspect this High Voltage Digital Insulation Meter and test leads before using for any
sign of abnormality or damage. If any abnormal conditions exist (broken test leads, cracked
case, display faulty etc...) do not attempt to take any measurement or use the tester. Return
the Meter for service.
This Variable High Voltage Digital Insulation Meter has a live circuit warning beeper. If it is
connected to a live circuit, a rapid pulsating tone will sound and a warning message will be
displayed. In this case, stop testing and immediately disconnect the instrument from the
circuit under test.
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