This task configures and activates all sounder bases one after another for a few seconds at a 'test' volume, and performs a measurement to detect any sounder bases with a high leakage current.

On completion of the measurements the device list is revised. Devices for which the sounder bases are suffering a fault are highlighted.

This function activates only the sounder bases FDSB291 and DBS720. No other alarm devices are activated.