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Voltage test – Fluke Fiber Viewer FT140 User Manual

Page 7

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Carrying out Measurements

Preparation and Safety
Measures

For any test (measurement) the safety re-

ferences have to be respected. Prior to

any usage, a functional test has to be car-

ried out.

Function test / Self test:

• Test the voltage tester on a known source.

• Connect the probes. A sound must be heard

and the Rx/

1 LED (7) must be lit. If the LED

does not light up, the batteries need to be re-

placed.

The voltage display of the instruments

also functions when using discharged or

no batteries > 20 V (LCD).

The voltage testers may no longer be

used if one or several functions fails or if

no functional reliability can be detected.

Remove discharged batteries from the de-

vice to prevent any leaks.

The instruments are equipped with an internal

load enabling the tripping of an RCD protection

device of 10mA or 30mA.

For voltage tests (L towards PE) in sys-

tems with RCD devices, the RCD may be

triggered. To avoid RCD tripping first test

between L and N (approx. 5s). Immediate-

ly afterwards testing L towards PE can be

carried out without RCD tripping (not T140

VDE)

Voltage Test

Safety measures 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 il-

luminated.

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.

Fluke T100/120/140

Users Manual

7

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