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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