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 UNITEST 2000
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 UNITEST 2000 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 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 UNITEST
2000 beta and gamma 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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