Detector 3000
Seite 4 / 11
Stand: 29.8.19 GB
2. Safety Measures
The testers have been constructed and tested in accordance with the safety regulations for
voltage testers and have left the factory in a safe and perfect condition.
The operating instructions contain information and references required for safe operation
and use of the tester. Before using the tester, read the operating instructions carefully and
follow them in all respects.
Depending on the internal impedance of the voltage tester there will be a different capability
of indicating the presence or absence of operating voltage in case of the presence of
interference voltage.
A voltage tester of relatively low internal impedance, compared to the reference value of
100 kΩ, will not indicate
all interference voltages having an original voltage value above the
ELV level. When in contact with the parts to be tested, the voltage tester may discharge
temporarily the interference voltage to a level below the ELV, but it will be back to the
original value when the voltage tester is removed.
When the indication “voltage present” does not appear, it is highly recommended installing
earthing equipment before work.
A voltage tester of relatively high internal impedance, compared to the reference value of
100 kΩ, may not permit
to clearly indicate the absence of operating voltage in case of
presence of interference voltage.
When the indication “voltage present” appears on a part that is expected to be
disconnected of the installation, it is highly recommended confirming by another means
(e.g. use of an adequate voltage tester, visual check of the disconnecting point of the
electric circuit, etc.) that there is no operating voltage on the part to be tested and to
conclude that the voltage indicated by the voltage detector is an interference voltage.
A voltage tester declaring two values of internal impedance has passed a performance test
of managing interference voltages and is (within technical limits) able to distinguish
operating voltage from interference voltage and has a means to directly or indirectly
indicate which type of voltage is present.
3. Danger of electric shock and other dangers
To avoid an electric shock, observe the precautions when working with voltages
exceeding 120 V (60 V) DC or 50 V (25 V) eff AC. In accordance with DIN VDE these
values represent the threshold contact voltages (values in brackets refer to limited ranges,
e.g. in agricultural areas).
The tester must not be used with the battery compartment open
Before using the tester, ensure that the test lead and device are in perfect working order.
Look out e.g. for broken cables or leaking batteries.
Hold the tester and accessories by the designated grip areas only, the display elements
must not be covered. Never touch the test probes.
The tester may be used only within the specified measurement ranges and in low-voltage
installations up to 1000VAC and 1500VDC.
The tester may be used only in the measuring circuit category it has been designed for.
Before and after use, always check that the tester is in perfect working order (e.g. on a
known voltage source).
