User's Manual

MPR series User’s Manual: Draft version 0.95 11/4/04 page 59
1.9 Notices
1.9.1 RFID limitations
Communication between tags and readers at UHF frequencies is a complex phenomenon depending on
details of the environment surrounding the tags and reader(s) as well as the equipment being used. Some
environmental aspects (such as tag placement and orientation) may be controllable by the user; others (such
as reflections of the RF radiation by ambient objects) are generally not. Careful installation and testing,
and development and adherence to appropriate operating procedures, are indispensable for successful
implementation of RFID. WJ Communications Inc. makes no representation or warrantee that any specific
configuration of RFID tags and readers will provide any given performance characteristics.
1.9.2 Safety
Any use of this equipment with antennas or cabling installed outdoors or otherwise exposed to inclement
weather must avoid proximity with power lines or other high-voltage conductors, and provide for proper
grounding and lightning arresting devices to protect the equipment user in the event of a lightning strike.
See National Electrical Code (NEC) requirements articles 725, 800, and 810 for further information.
Do not operate the MPR5000/6000/7000 in any area where critical safety equipment may be sensitive to
RF interference, such as medical or life support equipment.
Do not operate the MPR5000/6000/7000 on board any aircraft in flight, or at any other time when operation
of radio devices such as cellular phones is prohibited.
Personnel should not be closer than 23 cm (9 inches) from any MPR antenna for prolonged periods of time.
See FCC bulletins 56 and 65 for further information on electromagnetic field exposure.
1.9.3 Limitation of liability
The information in this manual is subject to change without notice and does not represent a commitment on
the part of WJ Communications Inc. WJ Communications, Inc. specifically disclaims liability for any and
all direct, indirect, special, general, incidental, consequential, punitive or exemplary damages, including but