Page 4 of 5
Approved Document No. DAU0001103 Rev 1
Diagram 3 Measuring Field strength on Disabled refuge outstations
Note: Where an audio frequency induction loop system is provided at an outstation, it should be installed and maintained according to the
recommendations of BS 7594.
The performance of the audio frequency induction loop system should meet the requirements of BS EN 60118-4 at the six locations shown
in Diagram 2, namely 400 mA/m
Diagram 4 Connecting the line out of an Intercom to a PDA103i
Input level
Output
Level
PSU to mains AC
