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Benning Duspol Digital Manual

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01/2014
DUSPOL
®
digital
8
O
symbol for external conductor test (phase indication)
P , symbol of the phase sequence indication (left /
right)
Q
Display for voltage (V)/resistance (kΩ)
R
+/- of the polarity indication
S VDC/VAC voltage type (direct/alternating voltage)
T Frequency indication (Hz)
symbol for diode test
symbol for discharged battery
kΩ symbol for resistance measurement
3. Functional test before use to ensure the absence of
voltage of an installation (gure A)
- Check the voltage tester for correct functioning immedi-
ately before and after using it!
- It must be possible to switch the voltage tester on as fol-
lows:
• automatically, if a voltage of 6 V or more is applied to
the probe tips L1/-
2
and L2/+
3
,
• by actuating the push-button
7
of the display handle
L2
9
,
• by short-circuiting the probe tips L1/-
2
and L2/+
3
.
- If the symbol is shown on the LC display
6
, the bat-
tery must be replaced.
- The device is switched off automatically after 10 seconds.
- Activation of the self-test:
• Short-circuit the probe tips L1/-
2
and L2/+
3
.
• Press and hold the push-button
7
of the display han-
dle L2
9
for approx. 3 seconds to start the self-test.
• The buzzer sounds and all segments of the LC dis-
play, all LEDs (running light) as well as the back-
ground and measuring point illumination must be
functioning.
- 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 (g-
ure B/C)
For checking the installation, please test the absence of vol-
tage by checking the voltage indication, the phase indication
(the phase indication only works in an earthed AC voltage
mains) and the vibration motor (the vibration motor is activated
by actuating both push-buttons). The installation is only free
of voltage, if all three test circuits (voltage indication, phase
indication and vibration motor) are signaling the absence of
voltage.
- Apply the two probe tips L1/+
2
and L2/-
3
to the system
parts to be tested.
- The voltage tester switches on automatically as soon as a
voltage ≥ 6 V is applied.
- The level of voltage applied is indicated by means of the
LED step indicator
J
and the digital display
6
.
The 400 V LED of the LED step indicator 10 covers
the voltage range from 400 V AC/DC to 1,000 V AC/
1,200 V DC.
- Alternating voltages are indicated by means of the VAC
symbol on the LC display
6
. Additionally, the frequency
T
of the AC voltage applied is displayed.
-
Direct voltages are indicated by means of the VDC symbol
on the LC display
6
. Additionally, the polarity indication
R
shows the polarity (+ or -) applied to the probe tip L2/+
3
.
- To differentiate between low-energy and high-energy volt-
ages (e.g. capacitively induced interference voltages), an
internal load in the voltage tester can be connected by ac-
tuating both push-buttons (see section 5).
Voltage test < 6 V (low-volt) (gure D)
In order to measure voltages lower than 6 V, short-circuit the
probe tips L1/-
2
and L2/+
3
and press the push-button
7
of the display handle L2
9
three times until the „Lo U“ symbol
is shown on the LC display
6
.
- In the low-volt range, voltages from 1.0 V to 11.9 V can be
measured.
- After being activated, the low-volt range is active for ap-
prox. 10 seconds.
- By applying a voltage ≥ 12 V, the device automatically
switches over to a higher voltage range.
Note:
In the low-volt range, the frequency indication
T
is deactivated.
Overload indication
If the voltage applied to the probe tips L1/-
2
and L2/+
3
is
higher than the admissible nominal voltage, the „OL“ symbol is
shown on the LC display
6
and all LEDs of the step indica-
tor
J
are ashing. Overload is indicated from 1,050 V AC,
1,250 V DC on.
5. Load connection with vibration motor (gure B/C)
Both handles L1
8
and L2
9
are equipped with push-buttons
7
. Here, voltage is applied to a vibration motor (motor with
unbalanced mass) in the display handle L2
9
. From approx.
200 V on, this motor is set in rotary motion. With the voltage
increasing, the motor‘s speed and vibration increases as well.
The duration of the test with a lower internal resistance (load
test) depends on the level of voltage to be measured. In order
to avoid an inadmissible warming of the device, it is provided
with a thermal protection (controlled reduction). With this con-
trolled reduction, the speed of the vibration motor is reduced
and the internal resistance increases.
The load connection (with both push-buttons being actuated)
can be used ...
- to suppress reactive voltages (inductive and capacitive
voltages),
- to charge capacitors,
- to trip 10/30 mA FI safety switches. The tripping of the FI
… 8 …


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