Methods of assessment



HAVwear has the capability of providing layered HAVs risk exposure data of both TEP and SEP:



Tool Exposure Points (TEP) are calculated using the HSE risk assessment Exposure Points system,  combining the length of time a tool is in use (trigger time) with the vibration value that is programmed on the HAVwear Tag. The validity of the value programmed in the HAVwear tag is a responsibility of the employer to be “representative of the tool use by their operators”. A number of sources for the pre-defined magnitude can be used and the HSE will look for justification of choice.




Sensed Exposure Points (SEP) are calculated by the same HSE risk assessment methodology but utilises a real-time vibration magnitude level sensed at the wrist, in combination with the length of time a tool is in use (trigger time).  If SEP data is solely used, the HSE will look for evidence that SEP vibration levels are appropriate.


In summary the only difference is the source of the vibration magnitude.

The employer always has access to both TEP and SEP data which are stored online. However, to avoid confusion to the tool user, the HAVwear monitor displays only one points system.

The employer chooses TEP or SEP to be displayed on the monitor.  This choice is based on their assessment of which vibration is most probably that faced during tool use - the static tool data for TEP or the sensed vibration on the wrist for SEP.


Gerry James, Sales Director at Towergate Insurance to the ears of underwriters