User Manual

Troubleshooting
July 2008 Revision 4.2 55/62
9 Troubleshooting
The following table lists the most common problems and describes their solutions.
Table 6: Troubleshooting Table
Fault Possible Causes Solution
9.1 Sources of Interference
The following devices may cause interference with EAS systems if they are close to the pedestals:
 TAGSYS RFID tag readers and programming devices
 computer monitors or screens (cathode ray tubes)
 radio transmitters
 short-wave radios
 high power music systems with D-class amplifiers
 some industrial vacuum cleaners
 high-frequency fluorescent lights (if very close to pedestals)
 neon or halogen lights such as advertising signs
 equipment using switch mode power supplies
 data or power cables within 400 mm
 illuminated exit signs generating noise between 80 and 100 kHz
 digital phone lines (wideband noise) within 200 mm
Differential or micro circuit
breakers
Check the differential and micro
circuit breaker status
System fuse Replace fuse.
No power
Cabling fault.
Power cable fault
Check cabling and connections.
Replace any suspected faulty
cables.
Alarms missed (TAGSYS RFID
tags with theft bit ON not triggering
alarms).
Tuning fault. Check antenna tuning.
Tuning fault. Check antenna tuning.
False alarms (TAGSYS RFID tags
with theft bit OFF trigger alarms).
Nearby devices are interfering with
the pedestals. (Refer also to
section 9.1)
Switch off all or some of the
suspicious nearby devices and
check if the EAS detection
performance changes. (If it does,
check for a power problem with the
pedestal.)
CAUTION: These distances are subject to site variables. Distance may be smaller under
some conditions. Metal frames on furniture and fixture items may interfere with the EAS
system if they are too close. This is because energy from the antenna can couple into the
metallic frame and be transmitted to TAGSYS RFID tags and antennas several meters away.