User Responsibility; Mains Connection Grounding; Speaker Output Hazard; Radio Interference - Lab.gruppen PLM Series Operation Manual

3.3 User Responsibility

3.3.1 Mains connection grounding

Your PLM must be connected to a grounded
socket outlet.

3.3.2 speaker output hazard

PLMs are capable of producing hazardous
output voltages. To avoid electrical shock, do
not touch any exposed speaker wiring while the PLM
is operating. The external wiring connected to the
speaker terminals shall be installed by a qualified
person, or ready-made leads or cords of appropriate
capacity shall be used.
As the power output channels produce high
voltage, do not connect or disconnect speaker
cables when the mains power is on.

3.3.3 Radio interference

A sample of this product has been tested and complies
with the limits for the European Electro Magnetic
Compatibility (EMC) directive. This equipment has
also been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference
from electrical equipment. This product uses radio
frequency energy and if not used or installed in
accordance with these operating instructions, may
cause interference to other equipment, such as
radio receivers. However, there is no guarantee
that interference will not occur in a particular
installation.
If this equipment does cause harmful interference to
radio or television reception, which can be determined
by turning the equipment on and off, the user is
encouraged to try to correct the interference by one
or more of the following measures:
▸ Reorient or relocate the antenna.
▸
Increase the separation between the equipment
and receiver.
▸ Connect the equipment to an outlet on a
circuit different from that to which the receiver is
connected.
▸ Check if the affected unit complies with the EMC
limits for immunity, (CE-labeled). If not, address
the problem with the manufacturer or supplier.
All electrical products sold in the EC must be
approved for immunity against electromagnetic
fields, high voltage flashes, and radio inter-
ference.
▸
Consult the dealer or an experienced radio/TV
technician for help.

3.3.4 speaker damage

Your PLM Series device is very powerful and
can be potentially dangerous to both
loudspeakers and humans alike. Many loudspeakers
can be easily damaged or destroyed by overpowering
them. Always check the speaker's continuous and
peak power capabilities. Although the PLM's
attenuators can be used to reduce the overall gain,
an increase of the input signal can result in full output
power, which may cause damage to connected
speakers.

3.3.5 Maintenance

For safe and reliable operation, the dust covers behind
the front panel should be cleaned regularly. If the dust
filters are not maintained there will be safety risks.
For example the unit can ignite the dust and a fire
will occur due to high internal temperatures. There
is also a risk that the unit will malfunction since it is
dependent on constant airflow from front to rear. If
the dust filters are not clean and the unit malfunc-
tions, any resultant problems will not be covered by
the warranty.
PLM Series Operation Manual 7
WARNINGs 3