4.0 Carrying out Measurements
4.1 Preparation and Safety Measures
For any test (measurement) the safety references have to
be respected as mentioned in point 2.0. Prior to any
usage, a functional test has to be carried out.
Function test / Self test:
Test the voltage tester on a known source.
Connect test probes. An acoustic sound must be audible
and the LED Rx/Ω (7) must be illuminated.
The voltage display of the instruments FLUKE
T100/T120/T140 also functions when using discharged
or no batteries.
The voltage testers may no longer be used if one or se-
veral functions fails or if no functional reliability can be
detected.
The instruments FLUKE T100/ T120/ T140 re equipped with an
internal load enabling the tripping of an RCD protection device
of 10mA or 30mA.
For voltage tests (L towards PE) in systems with RCD de-
vices, the RCD may be triggered. To avoid RCD tripping
first test between L and N (approx. 5s). Immediately af-
terwards testing L towards PE can be carried out without
RCD tripping.
4.2 Voltage Test
Safety measures a mentioned in paragraph 2.0 have to
be met
Connect both test probes with UUT.
From a voltage of < 12V the voltage tester switches on
automatically.
•
The voltage is indicated by LED (4) and for models FLUKE
T120 and T140 also with a digital LCD (9).
•
For AC voltages the "+" and "-" LEDs are illuminated and an
additional signal sound is audible.
•
For negative voltages the LED (7) is illuminated and also
sound is audible.
•
The instruments are equipped with an LED row comprising:
12V, 24V, 50V, 120V, 230V, 400V, 690V.
•
For DC voltage, the polarity of the voltage displayed refers
to the instrument test probe (+).
•
Due to technical reasons the instrument cannot effectuate
an automatic switch-on for DC voltages within the range of
approx. 0V to -3V.
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