Metal loss testing
Determining metal loss and background noise levels are important steps in designing hearing loop systems to avoid loss of an intelligible signal and to meet the IEC 60118-4 international standard.
To correctly assess an area for metal loss and background noise a temporary loop will need to be used in either a Perimeter loop or figure of eight MultiLoop configuration, depending on the estimated levels of metal in the building structure.
For this you will need a loop driver, a field strength meter, a loop cable, a signal source and a tape measure.
Carrying a full size loop driver around can be cumbersome and impractical to setup every time so Ampetronic developed the HLS-2D Metal Loss Test Driver.
The HLS-2D is a light, portable, loop driver with a preset output level to give consistent test results; and when used in conjunction with the Loopworks Measure R1 or Ampetronic FSM field strength meters, forms part of a quick and simple site assessment system.
Visit the following YouTube videos for Perimeter and MultiLoop test procedures:
HLS-2D Metal Loss Test Kit includes:
- HLS-2D Driver
- 12V power supply
- 2x4mm connectors
- soft case and full instructions