scemtec Transponder Technology GmbH SIR-2720 Manual Do Utilizador
Manual and Specification
SIR-2720 (13.56 MHz Midrange Reader)
Document No. SIR-2720
Version:
0.04
Page
3 of 14
1
Introduction
As with all electronic systems, the system described hereafter may also not be used for any
applications critical for maintaining safety. This means, the products may not used in life
support applications or any other life critical applications that could involve potential risk of
death, personal injury or severe property or environmental damage.
The user/operator is solely responsible for any damages resulting from an improper or
unintended utilization of the system.
scemtec Transponder Technology GmbH (STT) reserves the right to make changes or to discontinue its
products or services at any time without notice.
STT takes no responsibility for customer applications, products, or performance relating to systems or
applications incorporating with STT products.
STT assumes no liability and is not responsible for infringement of patents and/or any other intellectual
or industrial property rights of third parties, which may result from assistance provided by STT.
The Windows
applications critical for maintaining safety. This means, the products may not used in life
support applications or any other life critical applications that could involve potential risk of
death, personal injury or severe property or environmental damage.
The user/operator is solely responsible for any damages resulting from an improper or
unintended utilization of the system.
scemtec Transponder Technology GmbH (STT) reserves the right to make changes or to discontinue its
products or services at any time without notice.
STT takes no responsibility for customer applications, products, or performance relating to systems or
applications incorporating with STT products.
STT assumes no liability and is not responsible for infringement of patents and/or any other intellectual
or industrial property rights of third parties, which may result from assistance provided by STT.
The Windows
®
logo is a registered trademark of Microsoft Corp.
All other products mentioned in this document might be brands or brand names of the different
suppliers.
Copyright
suppliers.
Copyright
©
2007 scemtec Transponder Technology GmbH (STT)
General:
As this technology is based on radio frequency, one must exercise the following operational and
mounting instructions to achieve best operation:
mounting instructions to achieve best operation:
•
Metal affects radio signals. Normally the antenna has to be as far away as possible from any
metal object and it’s damping influence on the magnetic field. Only this leads to the best
distribution of the magnetic field in the reading range. Very important as well is not to have “short
circuits”, in the vicinity of the antenna, damping the magnetic field. A “short circuit” is any metal
near the antenna, building a “metallic ring”, so that currents introduced by the RF-field can flow,
destroying the energy needed for the tag to operate.
metal object and it’s damping influence on the magnetic field. Only this leads to the best
distribution of the magnetic field in the reading range. Very important as well is not to have “short
circuits”, in the vicinity of the antenna, damping the magnetic field. A “short circuit” is any metal
near the antenna, building a “metallic ring”, so that currents introduced by the RF-field can flow,
destroying the energy needed for the tag to operate.
•
Care must be exercised to reduce or eliminate unwanted signals (so called interference or
noise) from external sources. The reading range may be reduced by following noise sources:
noise) from external sources. The reading range may be reduced by following noise sources:
•
portable two way radio
•
cellular phones
•
switching power supplies
•
computer monitors
•
frequency converters (e.g. motor control systems)
•
The read range is depending upon
•
performance of the reader
•
size of the antenna
•
size of the tag (the bigger the better)
•
orientation of the tag antenna plane to the reader antenna plane
•
quality of the tag
•
matching of reader antenna size and tag (-antenna) size
•
environmental, electrical noise
•
If influence of metal can not be fully avoided a tuning of the antenna is required and will
improve reading range
improve reading range