Fluke ScopeMeter 225C Getting Started Manual page 7

• Do not insert metal objects into connectors.
• Always use the test tool only in the manner
specified.
Max. Input Voltages
Input A and B directly ............................... 300 V CAT III
Input A and B via 10:1 probe ................... 1000 V CAT II
METER/EXT TRIG inputs........................ 1000 V CAT II
Max. Floating Voltage
From any terminal to earth ground .......... 1000 V CAT II
Between any terminal .............................. 1000 V CAT II
Voltage ratings are given as "working voltage". They
should be read as Vac-rms (50-60 Hz) for AC sinewave
applications and as Vdc for DC applications.
Measurement Category III refers to distribution level and
fixed installation circuits inside a building.
Measurement Category II refers to local level, which is
applicable for appliances and portable equipment.
The terms 'Isolated' or 'Electrically floating' are used in this
manual to indicate a measurement in which the test tool
input BNC or banana jack is connected to a voltage
different from earth ground.
The isolated input connectors have no exposed metal and
are fully insulated to protect against electrical shock.
The red and gray BNC jacks, and the red and black
600 V CAT III
4-mm banana jacks can independently be connected to a
voltage above earth ground for isolated (electrically
floating) measurements and are rated up to 1000 Vrms
600 V CAT III
CAT II and 600 Vrms CAT III above earth ground.
If Safety Features are Impaired
600 V CAT III Use of the test tool in a manner not specified may
impair the protection provided by the equipment.
Before use, inspect the test leads for mechanical damage
600 V CAT III
and replace damaged test leads!
Whenever it is likely that safety has been impaired, the
test tool must be turned off and disconnected from the line
power. The matter should then be referred to qualified
personnel. Safety is likely to be impaired if, for example,
the test tool fails to perform the intended measurements or
shows visible damage.
Getting Started
Safety Information: Read First
3