First switch off the mains voltage for the mains socket to which the lab mains unit is connected in
this case (switch off the corresponding circuit breaker or turn out the fuse, then switch off the fault
interrupter protection switch (FI circuit breaker) so that the mains socket is separated from the mains
voltage on all poles). Only then unplug the mains unit from the mains socket.
Do not use the lab mains unit anymore, but take it to a specialised workshop or dispose of it in an
environmentally friendly manner.
• Do not place the lab mains unit on any valuable furniture surfaces without using a suitable protection.
d) Operation
• Operation in environments with a high amount of dust, flammable gases, vapours or solvents is not
permitted. There is a danger of fire and explosion!
• Before taking the lab mains unit into operation and during operation, ensure that your hands, shoes,
clothes, the floor and the product itself are dry.
• Ensure that there is sufficient ventilation during operation. Never cover up the lab mains unit.
• Never leave the product unattended while operating. Despite a considerable number of protective
circuits, it is impossible to exclude the possibility of malfunctions during operation.
• Do not wear any metal or conductive materials, such as jewellery (necklaces, bracelets, rings, etc.)
while you are working with the lab mains unit and a connected consumer. Short-circuit poses a danger
of burns and explosion, as well as danger of injury.
• If several lab mains units are switched in series, a voltage dangerous to the touch may result. In this
case, there is a danger to life from electric shock!
• Only operate the product in a moderate climate, never in a tropical climate. For more information on
acceptable environmental conditions, see the chapter "Technical data".
• Never operate the device immediately after it was taken from a cold room to a warm room. The result-
ing condensation may lead to malfunctions or damage! There also is a risk of potentially fatal electric
shock!
Let the product reach room temperature before taking it into operation again. This may take several
hours!
• Avoid operation in direct proximity of strong magnetic or electromagnetic fields, transmitter aerials or
HF generators. This can affect the control electronics.
• Disconnect the lab mains unit's mains plug from the mains socket during thunderstorms to prevent
damage from overvoltage.
• Ensure that the insulation of the lab mains unit, the safety sockets, connected cables and mains cable
are not damaged or destroyed.
• Avoid the use of non-insulated metallic cables between the lab mains unit and the consumer! Use only
connection cables of sufficient size with intact insulation.
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