Measuring Point Illumination; Hold Function; How To Test Ac Voltages; How To Test The Phase At Ac Voltage - Benning DUSPOL digital LC Mode D'emploi

depends on the value of the voltage to be mea sured.
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.
Display field
The display field  consist of an LC display 4 as well
as high-contrast light-emitting didoes (LED) 3, 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. This LC display indicates the exceeding of the
upper limiting value for low voltages (ELV) 5, the phase
6, the symbol for continuity 7, the phase-sequence 8
and 9, the exact voltage value , the polarity at DC vol-
tage  and  as well as a symbol for weak batteries .
The measuring range for continuous voltage measure-
ment is set automatically. Up to 80 V, the value is indica-
ted with a decimal place. For higher values, the decimal
place is not indicated.

2.1 Measuring point illumination

The measuring point illumination can be activated by me-
ans of the push button  of test probe L1 A with the de-
vice being switched on. Depending on the brightness, the
LCD background illumination is activated automatically.
Note:
The indication must be 0.0 V for the measuring point
illumination, otherwise the voltage tester identify „Hold"
function.

2.2 Hold function

If you press and hold the push button  of test probe L1
A 1.5 seconds during a voltage test, the last measuring
value is indicated and is flashing. The voltage tester can
be separated from the unit under test and the measuring
value can be read (DATA-HOLD). The value can be dele-
ted by releasing the push button.
Note:
For load test, press longer than 1.5 seconds, the HOLD
function is activated!
3. Functional check
- Check the voltage tester for correct function immedi-
ately before use!
- Activation of the testing device (self-test),
• short circuit test probes
• switch the voltage tester on by means of the
push button  of test probe L1 A and hold the
push button 
• the buzzer sounds, all segments of the LC dis-
play as well as background and measuring point
lighting must indicate function
• after approx. 1 second, the measuring point and
LCD illumination is switched on (test of cable
connection and illumination)
- Test all functions by means of known voltage sour-
ces.
• 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.
• If necessary, replace the batteries.
Do not use the voltage tester unless all functions are
operating correctly!
4.

How to test AC voltages

- Place the contact electrodes  of the test probes L1
A and L2 B against the relevant points of the unit
under test.
- If a measuring voltage is present (6 V), the voltage
tester switches on automatically and indicates the
voltage value on the display  (up to approx. 80 V
with decimal place!).
- At AC voltage from 6 V onwards, the display indica-
tes the digital voltage value  as well as the „plus"
and „minus" symbol  and . Furthermore, all
12/ 2008

DUSPOL
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 B.
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 A and L2 B only!
Do not cover the display and do not touch the contact
electrodes!
Note:
The reading of the LC display  might be impaired due
to unfavorable light conditions.

4.1 How to test the phase at AC voltage

- The phase test is possible in the earthed mains from
230 V onwards!
- Firmly grasp the two handles A and B of the test
probes L1 and L2 (leakage current for phase test via
handle L1 A!).
- Switch the voltage tester on by briefly pressing the
push button  of test probe L1 A (stays switched
on for approx. 10 seconds). When the device is swit-
ched on, the display indicates „0.0"!
- Place the contact electrode  of test probe L1 A
against the relevant point of the unit under test.
Never touch the contact electrode of test probe L2 B
during the single-pole test (phase test)!
If the „ "-symbol 6 appears in the upper part of the LC
display 4, the tester is in contact with the live phase of
an AC voltage on this point of the unit under test.
Note:
The reading of the LC display 4 might be impaired due
to unfavorable light conditions, protective clothing or in
insulated locations.
5.

How to test DC voltages

- Place the contact electrodes  of the test
probes L1 A and L2 B against the relevant points of
the unit under test.
- With an applied voltage of at least 6 V, the voltage
tester switches on automatically and the display indi-
cates the voltage value.
- For voltages tests below 6 V, the voltage tester has to
be switched on by briefly pressing the push button  of
test probe L1 A.
- At DC voltage from 6 V onwards, the display indica-
tes the digital voltage value  as well as the „plus"
and „minus" symbol  and . 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 B.
With the voltage increasing, the speed of this motor
is increasing as well.

5.1 How to test the polarity at DC voltage

- Place the contact electrodes  of the test probes L1
A and L2 B against the relevant points of the unit
under test.
- With an applied voltage of at least 6 V, the voltage
tester switches on automatically and the display indi-
cates the voltage value.
- For voltages tests below 6 V, the voltage tester has to
be switched on by briefly pressing the push button 
of test probe L1 A.
- The polarity of the applied DC voltage is indicated by
means of a +  or a – symbol . Here, the indicated
pole is the pole measures by the indicating handle A.
6. How to test the phase sequence of a three-phase
mains
- The phase-sequence test is possible from 230 V AC
voltage (phase against phase) onwards in a earthed
digital LC
®

7