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Safely Using the Test Tool
5
Warning
Do the following to avoid electrical shock or
fire if a test tool
common input is
connected to more than 42V peak (30V rms):
• Use only test leads and test lead
adapters supplied with the test tool. (or
equivalents as specified in the accessory
list, see Chapter 2.)
• Do not use conventional exposed metal
banana plug connectors.
• Use only one common connection to the
test tool.
• Remove all test leads that are not in use.
• Use 600V (or more) rated and marked test
lead adapters. The maximum allowable
input voltage is 600V.
• Connect the power adapter to the AC
outlet before connecting it to the test
tool.
• Do not insert metal objects in the power
adapter connector.
The terms ‘Isolated’ or ‘Electrically floating’ are used in
this manual to indicate a measurement in which the test
tool COM (common, also called ground) is connected to a
voltage different from earth ground.
The term “Grounded” is used in this manual to indicate a
measurement in which the test tool COM (common) is
connected to an earth ground potential. For more
information about proper grounding, see Chapter 3.
The test tool COM (common) inputs (red INPUT A shield,
gray INPUT B shield, and black 4-mm banana jack) are
connected internally via self-recovering fault protection.
The input connectors have no exposed metal and are fully
insulated to protect against electrical shock. The black
4 mm banana jack COM (common) can be connected to a
voltage above earth ground for isolated (electrically
floating) measurements and is rated up to 600V rms
above earth ground.