Functional Test Before Use To Ensure The Absence Of; Checking The Absence Of Voltage Of An Installation - Benning DUSPOL digital Mode D'emploi

- Please observe that the impedance (internal resistance) of
the voltage tester influences the indication of interference
voltages (capacitively or inductively induced)!
Depending on the internal impedance of the voltage detector,
there will be a different capability of indicating the presence
or absence of operating voltage in case of the presence of
interference voltage.
Low-impedance voltage tester (impedance < 100 kΩ), inter-
ference voltage is suppressed or reduced:
A voltage tester of relatively low internal impedance, compared
to the reference value of 100 kΩ, will not indicate all interfer-
ence voltages having an original voltage value above the ELV
level (50 V AC/ 120 V DC). When in contact with the parts
to be tested, the voltage tester may discharge temporarily the
interference voltage to a level below the ELV, but it will be back
to the original value when the voltage tester is removed.
When the indication "voltage present" does not appear, it is
highly recommended to install earthing equipment before start-
ing work.
High-impedance voltage tester (impedance > 100 kΩ): Inter-
ference voltage will not be suppressed or reduced:
A voltage tester of relatively high internal impedance, com-
pared to the reference value of 100 kΩ, may not permit 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
from the installation, it is highly recommended to confirm by
another means (e.g. use of an adequate voltage tester capable
of distinguishing between operating voltages and interference
voltages, visual inspection 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 tester is an interference voltage.
Voltage testers capable of distinguishing between oper-
ating voltage and interference voltage by means of load
connection:
A voltage tester stating two values of internal impedance has
passed a performance test of managing interference voltages
and is (within technical limits) able to distinguish operating volt-
age from interference voltage and has a means to directly or
indirectly indicate which type of voltage is present.
Electrical symbols on the device:
Symbol

2. Device description
1 Probe tip protector
2 Probe tip L1/-
3
Probe tip L2/+
4
LED measuring point illumination
5
Sensor of the cable break detector
6
Push-button
7
Handle L1
8
Display handle L2
9
LED step indicator
J
+/- LEDs of the polarity indication
K
Red LED  (for external conductor test (phase indication)
L
G reen LEDs ◄LR► of the phase sequence indication
(left/right)
M
Y ellow LED Ω for continuity test (lights up)/cable break
detector (flashes)
3.

Functional test before use to ensure the absence of

voltage of an installation (figure A)
- Check the voltage tester for correct functioning immedi-
ately before and after using it!
- Activation of the self-test:
• Short-circuit the probe tips L1/-
• Press and hold the push-button
dle L2
• The buzzer sounds, all LEDs (except for the -12 V
LED or + 12 V LED)
lumination must be functioning.
- Replace the batteries, if the self-test cannot be activated
anymore.
- Test the voltage tester with familiar voltage sources, e.g.
with a 230 V socket.
- Do not use the voltage tester, if the voltage indication, the
phase indication and the vibration motor are not working
properly!
4. Checking the absence of voltage of an installation (fig-
ure B/C)
For checking the installation, please test the absence of
voltage by checking the voltage indication, the phase indication
02/ 2019
Meaning
Important documentation!
The symbol indicates that the guide described
in the manual, to avoid any risks
Device or equipment for working under voltage
Push-button
Alternating voltage (AC)
Direct voltage (DC)
Direct and alternating voltage (DC/AC)
Earth (voltage to ground)
Phase sequence indication; the phase se-
quence can be indicated only at 50 or 60 Hz
and in an earthed mains
This symbol shows the orientation of the batter-
ies for inserting them with correct polarity
3
for approx. 3 seconds to start the self-test.
DUSPOL

9 and the measuring point il-
expert
®
2
and L2/+
6
of the display han-
3
.
5