Installation Instructions

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TM
VOS SYSTEMS LLC
AlertTrace™ Testing & Settings Information
About Testing: Short-Term Static Testing is Bound for Problems… Here’s Why
Trying to set up devices in static locations and trying to ascertain results in a few minutes or an hour of
testing will provide more confusion than valuable information for several reasons, including:
• The accelerometers in the devices will make consistent data collection challenging;
• The wearables only report data to the Gateway/Hubs in “episodes” every ~15 minutes;
• Each wearable has its own internal clock so reporting to the Gateway/Hubs will be different
from wearable-to-wearable;
• The time for data to transit from the Gateway/Hub to the cloud servers and then to appear on
an Admin Dashboard can vary and sometimes can be delayed.
When testing, remember that the system is designed to aggregate data over relatively long periods of
time.
How to Set Up Real World Testing
For all the reasons above, and other more complicated reasons, attempting to perform short-term
tests will be confounding rather than helpful. We highly recommend “real world” testing.
• Place Wearables/Minis on a number of people who will be working in relatively close quarters.
• Let them move about normally.
• Gather the data at the end of the day or the next day.
• Don’t be concerned if a wearable occasionally records a contact that is a few feet beyond what
you set. This will happen relatively infrequently, and in the long run the data will provide better
and more actionable results specifically because you have set the system up with a less tightly
prescribed distance/range.
Over time, when the system is used as intended, it will generate the best data possible for proactively
guarding the health of team members.
Precision & Accuracy can be Problematic
The data that is most effective for contact tracing may in some ways seem counterintuitive. Intuitively,
it might seem that the best data would be that which is the most “precise”… where the accuracy of
distance computations would be very precise. But this is not the case. A good example would be this:
The Situation: Over a two-week period, a team member, Alice, has been in contact with John,
a fellow worker, for only 12 minutes at 4 to 6 feet of distance. But Alice’s desk sits 8 feet away
from John’s and during that same two weeks Alice has been within 8 feet of John for 60 hours.
John subsequently tests positive for infection.
Case 1: The contact tracing system records the duration of contact with other workers
in instances where the workers are precisely 6 feet or less from one another, but does