Conducting Tests; Voltage Test; In Case Of Empty Batteries, The Elv Led Lights; Single-Pole Phase Test - Neumann 2045flex Bedienungsanleitung

Conducting Tests

• A voltage detector of relatively high internal impedance,
compared to the reference value of 100 kΩ, may not per-
mit to clearly indicate the absence of operating voltage in
case of presence of interference voltage.
• When the indication "voltage present" appears on a part
that is expected to be disconnected of the installation, it is
highly recommended confirming by another means (e.g.
use of an adequate voltage detector, visual check of the
disconnecting point of the electric circuit, etc.) that there
is no operating voltage on the part to be tested and to
conclude that the voltage indicated by the voltage detector
is an interference voltage.
• A voltage detector declaring two values of internal im-
pedance has passed a performance test of managing
interference voltages and is (within technical limits) able
to distinguish operating voltage from interference voltage
and has a means to directly or indirectly indicate which
type of voltage is present.

7.1 Voltage test

• Connect both probes to the object under test.
• The voltage is indicated by LEDs and LCD
• Buzzer sounds when a threshold voltage of approx. 38V
AC/DC is exceeded.
• Voltage polarity is indicated in following manner.
• → AC: + and – 12V LED are on
→ +DC: +12V LED is on
→ – DC: – 12V LED is on
When the L2 probe + is the positive (negative) potential,
the Polarity indication LED indicates "+DC" ("-DC").
During voltage test, L or R LED may light up.

In case of empty batteries, the ELV LED lights

up > 50V AC/DC

7.2 Single-pole phase test

Function of this test may not be fully achieved if the
insulation condition/ grounding conditions of user or of the
equipment under test aren't good enough. Verification of
live-circuit shouldn't be dependent on this Single-pole
phase test only, but on the voltage test.
• Hold the tester good in your hand. Connect the

7.3 Phase rotation test

• L LED and R LED for Phase rotation test may operate on
various wiring systems, but effective testing result can be
obtained only on three-phase 4-wire system.
• Hold the tester good in your hand and connect both pro-
bes to the object under test.
• Phase-to-phase voltage is indicated by Voltage LEDs.
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"L2+" probe to the object under test. Single pole
LED lights up and buzzer sounds when a voltage of
approx. 100V AC or more exists in the object under
test. (Pol≥100VAC).