User's Guide

SAFE-DISTANCE Quick Start Guide - USA
Contact Reactec support at [e-mail] Doc No. 290-197 v1
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This is a quick start guide to setup and use the system.
For more detailed information and to download the full set of user guides, templates, training
videos and other support material click here: http://www.reactec.com/support
SAFE-DISTANCE is an added functionality to the Reactec system for monitoring
exposure to Hand Arm Vibration (HAV).
SAFE-DISTANCE determines the proximity of other wearers based on the signal strength of
Bluetooth radio signals from the other devices within its vicinity. The strength of the received
signal increases as the distance to the other device decreases. Reactec have determined a
threshold that indicates a proximity contact which is probably unsafe. All radio technology can be
compromised by certain environmental conditions and in particular the position and orientation of
the device antennas relative to the human body and each other. The human body can act as a
barrier to radio signals. Therefore, certain configurations will affect the distance at which the signal
strength threshold is met, leading to a variance as to when the alert is raised. The wrist worn
nature of SAFE-DISTANCE however makes the device much less susceptible to the limitations
outlined above. SAFE-DISTANCE’s ability to detect proximity of wearers is less hampered by body
blocking than that of torso worn devices or smart phone-based apps which may be carried in a
pocket and therefore SAFE-DISTANCE has a greater likelihood of proximity detection.
A HAVwear will determine that a proximity contact has been detected should the signal strength
indicate that the other unit is close, and the strength of signal is maintained for a configurable
length of time. This approach avoids raising false alarms from devices being close for very short
periods - such as briefly walking past colleagues.
In response to a number of customer requests, Reactec have enabled Cohort and SAFE ZONE
functionality within its SAFE-DISTANCE offering.
A Cohort facility allows the identification of a small number of individuals to be controlled as a
working cohort, meaning that these individuals are allowed to work within close proximity of each
other. When in close proximity the individuals will not receive alerts and the time will be recorded
separately as cohort time.
SAFE-ZONES are used to indicate areas where an individual is not at risk from being in contact with
germs as the area has physical barriers to prevent transmission. While such physical barriers may
prevent virus transmission, they may allow radio signals to pass through and hence create a false
proximity detection. SAFE-ZONE tags allow you to switch off detection of proximity.
It should be noted that any device used for social distancing based on Bluetooth is not an accurate
or fool-proof measurement system and should only be considered an aid to support implementation
of social distancing measures in the workplace.