Fluke 190 Series II User Manual page 16

Fluke 190 Series II
Users Manual
Voltage ratings that are mentioned in the warnings, are
given as limits for "working voltage". They represent
V ac rms (50-60 Hz) for ac sinewave applications and as
V dc for dc applications.
Measurement Category IV refers to the overhead or
underground utility service of an installation.
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 product
input BNC 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.
Fluke 190-062, 190-102, 190-104, 190-202, 190-204:
The BNC jacks can independently be connected to a
voltage above earth ground for isolated (electrically
floating) measurements and are rated up to 1000 Vrms
CAT III and 600 Vrms CAT IV above earth ground.
8
Fluke 190-502:
The BNC jacks can independently be connected to a
voltage above earth ground for isolated (electrically
floating) measurements and are rated up to 1000 Vrms
CAT II and 600 Vrms CAT III above earth ground.
If Safety Features are Impaired
Use of the product in a manner not specified may
impair the protection provided by the equipment.
Do not use test leads if they are damaged. Examine the
test leads for damaged insulation, exposed metal, or if the
wear indicator shows.
Whenever it is likely that safety has been impaired, the
product 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 product fails to perform the intended measurements or
shows visible damage.