12/ 2008
DUSPOL
®
digital LC
7
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
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
Summary of Contents for DUSPOL digital LC
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