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4.2 Testing function (self-test)
In accordance with DIN VDE 0105 part 1 voltage
testers need to be checked to ensure they function
correctly, before testing for absence of voltage.
Step 1 – Testing line and indication
When the device is switched off, hold the test elec-
trodes together, the ZAP 1050L switches on automa-
tically and the display indicates „000 kΩ“.
Step 2 – Testing function
Check the instrument at a known voltage source -
e.g. a 230 V socket.
Attention!
If one of the displays fails during the self-test the
voltage tester may not be placed into operation and
needs to be send to repair.
4.3 Voltage tests and polarity
Attention!
The maximum allowable on-time is 30 s (exception:
when charging the device at a 230 V socket, see 4.7).
Note!
When the push-buttons are not pressed the Prüfball
has a high internal resistance. In extreme cases, in-
dication of inductive or capacitive voltages may oc-
cur which disappears when both push-buttons are
pressed.
Connect securely both test prods to the test point.
Depending on voltage level, the red LED lights up
at > 50 V, 120 V. The device selects automatically the
correct voltage type (AC/DC), indicates voltage in “V”
at the display and the bargraph. The flashing symbol
“OL” warns against voltages outside the rated vol-
tage range. Then testing must be stopped.
Polarity
Type of voltage is indicated by the symbols “~” and “-“.
No symbol appears when the test prod marked „+“ is
applied to plus of a d.c. voltage. When its applied to
minus, the value is preceded with a “-”.
4.4 Phase and phase sequence test
These tests can only be performed without push-
button actuation.
Attention!
During these tests the device must be hold tightly by
its handles. It is possible to wear insulating gloves.
Note:
Tests work only in grounded a.c. voltage systems with
voltages of approx. 165 V or more against ground.
Phase test
The phase conductor is identified by applying the
test electrode marked “+” to the conductor and by
clasping the handle of the display part at the same
time. When the conductor is energized, “POL” is indi-
cated at the display.
