Fluke 190-102/S 2-channel hand-held oscilloscope, ScopeMeter® 190 series II, hand-held 4025383 User Manual

8 

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. 

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. 

 

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.