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Potential For Electromagnetic Interference; Electromagnetic Compatibility (Emc) - Walgreens WGNBPA-755BT User Manual

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To avoid inaccurate results caused by electromagnetic interference between
electrical and electronic equipment, do not use the device near a cell
phone or microwave oven. For most wireless communication devices, it is
recommended to maintain a distance of 10.8 feet (3.3m) inorder to avoid
electromagnetic interference.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference,
and (2) this device must accept any interference received, including
interference that may cause undesired operation.
The manufacturer is not responsible for any radio or TV interference
caused by unauthorized modifications to this equipment. Such modifications
could void the user authority to operate the equipment.
This equipment has 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
in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
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 off
and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
• Guidance and manufacturer's declaration – electromagnetic emissions
The device is intended for use in the electromagnetic environments listed below, and should only be
used in such environments:
Emissions test
RF emissions CISPR 11
Group 1
RF emissions CISPR 11
Class B
Harmonic emissions IEC
Class A
Voltage fluctuations/ flicker
emissions IEC 61000-3-3
• Guidance and manufacturer's declaration – electromagnetic immunity
The device is intended for use in the electromagnetic environments listed below, and should only be
used in such environments:
Immunity test
IEC 60601 test level
± 6 kV contact
discharge (ESD)
± 8 kV air
IEC 61000-4-2
Power frequency
3 A/m
(50/60 Hz)
magnetic field
IEC 61000-4-8
Electrical fast
± 2 kV for power supply
IEC 61000-4-4
± 1 kV for input/output
± 1 kV line(s) to line(s)
IEC 61000-4-5
± 2 kV line(s) to earth
Electromagnetic environment – guidance
RF energy is used only to maintain device's operation.
Therefore, its RF emissions are so low that it's not likely to
cause any interference in nearby electronic equipment.
The device is suitable for use in all establishments,
including domestic establishments, and those directly
connected to the public low-voltage power supply network
that supplies buildings used for domestic purposes.
Compliance level
Electromagnetic environment–
± 6 kV contact
The relative humidity should be at
± 15 kV air
least 5 %.
30 A/m
Power frequency magnetic fields
should be at levels characteristic of
a typical location in a typical com-
mercial or hospital environment.
Recommended separation distance
r = --------- (m)
where I is the current in amperes in
a power bus or an appliance wire
and r is the recommended separa-
tion distance between your device
and the power bus or appliance
wire, in meters (m).
± 2 kV for power
Mains power quality should be that
supply lines
of a typical commercial or hospital
± 1 kV for input/
output lines
± 1 kV line(s) to
Mains power quality should be that
of a typical commercial or hospital
± 2 kV line(s) to

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