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The circuit under test must be de-energized and isolated before connections are made
except for voltage measurement.
Circuit connections must not be touched during a test.
After insulation tests, capacitive circuits must be allowed to discharge before
disconnecting the test leads. Automatic discharge is an additional safety feature and
should not be regarded as a substitute for normal safe working practice.
The 'Test' button must not be pressed when making a voltage test.
U.K. Safety Authorities recommend the use of fused test leads when measuring voltage
on high energy systems.
Replacement fuses must be of the correct type and rating.
Test leads, including crocodile clips, must be in good order, clean and have no broken or
cracked insulation.
Warnings and Precautions must be read and understood before the instrument is used.
They must be observed during use.
This equipment is designed for use only in a controlled electromagnetic environment.
CAT II
Measurement category II: Equipment
connected between the electrical
outlets and the user's equipment.
the instruments must only be used by suitably trained and competent persons

SAFETY WARNINGS

CAT III
Measurement category III: Equipment
connected between the distribution
panel and the electrical outlets.
note
CAT IV
Measurement category IV: Equipment
connected between the origin of the
low-voltage mains supply and the
distribution panel.
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Bm12

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