46
Distortion and interference
In the HR monitor, a receiver for signals from the chest strap trans-
mitter is integrated. During use, it may arise that the HR monitor
receives signals other than those transmitted by the chest strap.
How can I recognize interference?
Interference can be recognized in that the values displayed are un-
realistic. If your normal heart rate amounts to 130 bpm and it is sud-
denly shown to be 200, then a short-term disturbance is present.
Once you have removed yourself from the vicinity of the source
causing the disturbance, the values will automatically resume being
accurate. Please note that distorted values can mildly influence the
training result displays and overall values.
What kind of causes for interference are there?
In some situations, short-range electromagnetic interference can
occur. In order to avoid these, keep well away from these sources.
Nearby power lines
Walking through security gates in airports.
Nearby overhead lines (tram)
Nearby traffic lights, television sets, car motors, bike computers
Nearby exercise equipment
Nearby mobile phones
Interference from other devices for measuring heart rates
The HR monitor as a receiver can react to interfering stray signals
such as other heart rate monitors within a vicinity of one metre. This
can result in incorrect measurements particularly when training in
groups. If you e.g. jog next to one another, it can be beneficial to
wear the HR monitor on the other wrist or to increase the distance to
one's training partner.
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