How To Test Ac Voltages; How To Test The Phase At Ac Voltage - Benning DUSPOL expert Manual Del Usuario

Direct current (DC)
Direct and alternating current (DC and
AC)
Push button (manually actuated); indicates
that respective indications only occur
when both push buttons are actuated
Phase-sequence clockwise
Phase-sequence indication; the phase
sequence can only be indicated at 50 or
60 Hz and in a earthed mains
This symbol shows the correct alignment
of the batteries to ensure correct polarity
Signal lamp, optical signal for continuity
check
Buzzer, acoustic signal for continuity
check
Symbol for phase and phase-sequence
indication (phase-sequence clockwise)
2. Functional description
®
The DUSPOL expert is a two-pole voltage tester
according to IEC 61243-3 with visual display. As a
supplementary device, the voltage tester is equipped with
a phase indication, phase-sequence indication, measuring
point illumination and a continuity check function. The
supplementary functions – except the phase indication
– are supplied via two replaceable micro batteries (LR
03/ AAA). The signalling of the continuity check is done
optically and acoustically. The voltage tester is designed
for DC and AC voltage tests within the voltage range of
12 V up to AC 690 V/ DC 750 V. It can be used to perform
polarity tests in DC and phase tests in AC. The voltage
tester indicates the phase-sequence provided that the
neutral is earthed.
The voltage tester consists of the test probes L1
L2 and a connecting cable . The test probe L1
is equipped with a display . Both test probes are
provided with push buttons . Without pressing both
push buttons, the following voltage steps (AC or DC) can
be indicated: 24 V+; 24 V-; 50 V; 120 V; 230 V; 400 V;
AC 690 V/ DC 750 V. By pressing both push buttons,
the voltage tester switches to a lower internal resistance
(suppression of inductive and capacitive voltages). Thus,
also the indication of 12 V+ and 12 V-
Furthermore, a vibrating motor (motor with a flyweight) is
put under voltage. From approximately 200 V this motor
is set in rotation. With the voltage increasing, the motor's
speed and vibration increases as well so that additionally
by means of the handle of test probe L2
value can be estimated roughly (e.g. 230/ 400 V). The
duration of the test with a lower internal resistance of the
device (load test) depends on the value of the voltage
to be measured. To prevent excessive warming of the
voltage tester, it is equipped with a thermal protection
(reverse control). With this reverse control, the speed of
the vibrating motor decreases as well.
The measuring point illumination can be activated by
pressing the push button  of test probe L1
voltage measurement with ripple (two-pole measurement),
the illumination is activated with reduced brightness. The
activation of the continuity check can be introduced by
bringing together the two contact electrodes .
Display field
The display system consists of high-contrast light-emitting
05/ 2008

is activated.
the voltage
. For the
diodes (LED)  indicating DC and AC voltages in steps
of 12; 24; 50; 120; 230; 400; AC 690 V/ DC 750 V. The
indicated voltages are nominal voltages. With DC voltage,
the LEDs also indicate the polarity for 12 V and 24 V
(see chapter 5). The 12 V LED can only be activated by
pressing both push buttons.
LC display
The LC display  serves for the phase test with
alternating current (AC) and indicates the phase-
sequence of a three-phase mains.
3. Functional check
- The voltage tester must be used only within
the nominal voltage range of 12 V up to
AC 690 V/ DC 750 V!
- Never connect the voltage tester to voltage for longer
than 30 seconds (maximum permissible operating
time = 30 s)!
- Check the voltage tester for correct function
immediately before use!
- Test all functions by means of known voltage
sources.
• For DC voltage tests use e.g. a car battery.
• For AC voltage tests use e.g. a 230 V socket.
• Connect both contact electrodes  to test the
continuity check for correct function.
• Check the battery status for the phase-sequence
indication by activating the measuring point
illumination. Replace the batteries, if necessary.
Do not use the voltage tester unless all functions are
operating correctly!
Check the function of the LC display  by single-pole
connection of the contact electrode  of the test probe
L1 to an external conductor (phase).
4.

How to test AC voltages

- The voltage tester must be used only within the
nominal voltage range of 12 V up to AC 690 V!
- Never connect the voltage tester to voltage for longer
than 30 seconds (maximum permissible operating
time = 30 s)!
- Firmly grasp the insulated handles
test probes L1 and L2.
- Place the contact electrodes  of the test probes L1
and L2
under test.
and
- For AC voltages from 24 V onwards and when
pressing both push buttons (load test) from 12 V
onwards, the LEDs "plus" and "minus"  and  light
up. Furthermore, all LEDs light until the step value of
the applied voltage is reached.
- When pressing both push buttons  and from an
applied voltage of approx. 200 V onwards, a vibrating
motor is put in rotation inside the test probe L2
With the voltage increasing, the speed of this motor
is increasing as well.
Please make sure that you touch the voltage tester at the
insulated handles of test probes L1
Do not cover the display and do not touch the contact
electrodes !

4.1 How to test the phase at AC voltage

- The voltage tester must be used only within the
nominal voltage range of 12 V up to AC 690 V!
- The phase test is possible in the earthed mains from
230 V onwards!
- Firmly grasp the handle of test probe L1
- Place the contact electrode  of test probe L1
against the relevant point of the unit under test.
- Never connect the voltage tester to voltage for longer
than 30 seconds (maximum permissible operating
time = 30 s)!
- If the "R" symbol appears on the LC display ,
the tester is in contact with the live phase of an AC
voltage on this point of the unit under test.
Never touch the contact electrode of test probe L2
DUSPOL expert
®

against the relevant points of the unit
and L2
and of the
.
only!
.
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