8
Loop installation guidance
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The installation should initially be planned with a 2 x 1�5mm² paired wire� Connect
the wires in series as a 2-turn loop� If the desired field strength is not achieved,
connect the wires in parallel creating a 1-turn loop� In installations where a standard
round wire is not suitable e�g� due to limited space, flat copper foil is recommended�
•
Venues with reinforced structures can reduce the coverage area significantly�
•
Analog signal cables should not be placed closely or in parallel to the loop wire�
•
Avoid dunamic microphones to reduce the risk of magnetic feedback�
•
The loop should not be installed closely to or directly on metal constructions or
reinforced structures� The field strength might be reduced substantially�
•
If the shortest side of the loop area is longer than 10 meters, a figure eight loop
configuration should be installed�
•
Verify that the overspill outside of the loop is acceptable� If not, a Univox® SLS
system should be installed�
•
Relocate any electrical equipment that could create background magnetic field
signals or interference with the loop system�
•
In order to avoid feedback from electronic instruments and dynamic microphones, do
not install wire near a stage area�
•
A completely installed loop system should be tested with Univox® FSM field strength
meter and certified according to the IEC 60118-4 standard�
•
Univox Certificate of conformity, including a measurement procedure checklist,
is avaliable at:
www.univox.eu/support/consultation-and-support/certify-installation/
System check/Troubleshooting
1� Check that the amplifier is connected to the mains power (yellow LED illuminated)�
Proceed to step 2�
2� Check the input connections� The cable between the amplifier and the signal
source/s (TV, DVD, radio etc�) must be properly connected, (green LED “In”
illuminated)� Proceed to step 2�
3� Check the loop cable connection, (blue LED)� The LED is illuminated only if the
amplifier is transmitting sound to the hearing aid and the system is working correctly�
If you are not receiving an audio signal in your hearing aid, verify that the hearing aid
is functioning properly and is set in T-position�
