15
3.2 Testing display and function (self-test)
In accordance with DIN VDE 0105-100 voltage
testers must be checked if they function correctly,
briefly before and whenever possible after the use,
for determining absence of voltage.
Step 1 - Checking the line / function
Hold the test electrodes together.
The display shows “ - - - Ω“.
At the same time, the green LED “Ω“ lights up.
Separate the test electrodes.
The display shows „OL Ω“.
Through this, the overall functions have been
tested.
Note:
In case the battery symbol appears when holding
the test electrodes together, the accu needs to be
recharged (see section 6). Voltage tests can still be
performed, even when accu is entirely depleted.
Step 2 - Test of the LV indication
Check the function of the LV indication (red LED)
at a known voltage source (AC and DC).
At the same time, the voltage value is indicated on
the display.
Attention!
If one of the displays fails during the self-test – even
if only partial failure occurs – or if the instrument
does not indicate a function standby, the voltage
tester may not be placed into operation!
4. Testing
4.1 General Instructions
The voltage tester switches on automatically when
a voltage of at least 12 V is applied. If the function
continuity testing had been activated, the device
switches automatically over to voltage testing. In
order to extend battery life the instrument switches
off automatically approximately 2 seconds after the
last measurement.
4.2 Testing voltage an polarity
Securely contact the test electrodes with the test
points. Voltage is indicated on the display.
Attention!
When a hazardous voltage (≥ 50 V AC / 120 V DC) is
impressed, the red LED lights up and appears
on the display.
The maximum allowable on-time for voltage testing
is 30 seconds. (Exception: When charging the accu at
a 230 V socket, see 4.1)
Note:
The LV indication (red LED) and the display remain in
working order, even with empty battery.
Direct and alternating voltage, polarity
The type of voltage is indicated by the symbols ”~”
for AC and ”-” for DC. When minus is connected to
the test electrode with display part designated with
”+”, then the “-” leading sign appears. When plus is
connected, then no leading sign appears left to the
displayed value.
