Fluke 124 [14/86] If safety features are impaired

Fluke 123/124

Users Manual

• 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............................... 600 V CAT III

Input A and B via BB120 .......................... 300 V CAT III

Input A and B via STL120 ........................ 600 V CAT III

Max. Floating Voltage

From any terminal to ground.................... 600 V CAT III

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.

Overvoltage Category III refers to distribution level and

fixed installation circuits inside a building.

The terms ‘Isolated’ or ‘Electrically floating’ are used in

this manual to indicate a measurement in which the Test

Tool’s Shielded Banana inputs 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.

If Safety Features are Impaired

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

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.