BS 10999:2010 Specification for distress signal units for the fire and rescue service
BS 10999 is a British Standard which specifies minimum requirements for the performance and testing of distress signal units (DSUs) that emit at least an audible signal:
a) To summon aid in the event the user becomes incapacitated or needs assistance, or for signalling evacuation, for use by Fire and Rescue Service (FRS) personnel, and
b) That is activated automatically on immobility of the wearer of the DSU and manually operated separately by the wearer.
BS 10999 is intended for DSUs used by the FRS and is applicable to both stand‑alone DSUs and those integrated into self-contained breathing apparatus (SCBA).
Contents of BS 10999:
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Materials
6 Priming and operation
7 Low battery warning
8 Function indicator
9 Intrinsic safety and electromagnetic compatibility
10 Mass
11 Resistance to temperature and flammability
12 Watertightness
13 Resistance to impact
14 Marking
15 Information supplied by manufacturer
Annexes
Annex A (normative) Test for sound level
Bibliography
List of figures
Figure A.1 – Example test chamber