Fluke 91 Series II User Manual page 9

VIII
WARNING
READ "SAFETY" CAREFULLY BEFORE USING YOUR
SCOPEMETER TEST TOOL.
SAFETY
The instrument described in this manual is designed to be
used only by qualified personnel.
Safety Precautions
To use this instrument safely, it is essential that operating
and servicing personnel follow both generally accepted
safety procedures and the safety precautions specified in
this manual.
Specific warning and caution statements, where they
apply, will be found throughout the manual.
Where necessary, the warning and caution statements
and/or symbols are marked on the instrument.
A CAUTION identifies conditions and actions that may
damage the test tool.
A WARNING IDENTIFIES CONDITIONS AND ACTIONS
THAT POSE HAZARD(S) TO THE USER.
91/92/96/99/105
International electrical symbols used are explained below.
Caution (see
explanation in manual)
Common (Lo) input
symbol, equal
potential
High BNC input
symbol
Earth
The terms "Isolated" or "Electrically floating" are used in
this manual to indicate a measurement in which the
ScopeMeter 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 ScopeMeter test tool COM
(common) is connected to an earth ground potential.
The ScopeMeter test tool COM (common) inputs (red
INPUT A BNC shield, grey INPUT B BNC 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
Users Manual
DOUBLE
INSULATION
(Protection Class)
Recycling symbol
DC-Direct Current
AC-Alternating
Current