Acumen HR427 - Manual (Page 15)

TROUBLESHOOTING
Can't get a Heart Rate reading?
The most common cause for the heart rate not turning on or
working erratically is that the belt is not positioned correctly or not
moistened properly. Make sure that the belt is positioned high
enough on your chest (too high is better than too low) and
properly moistened. The tension should be comfortable but it
shouldn’t be so loose that it slides down the chest. Also make sure
that your monitor is within the 3ft. transmitting distance of the
transmitter and check the angle of its position (at greater distances,
the monitor face should be parallel and facing the transmitter,
instead of on an angle).
It is also known that a small percentage of the population may have
trouble getting an accurate heart rate reading with this type of
device due to the many various intricacies of the heart rate signal.
The signal may be too weak on the surface of the skin, stronger in
a different location of the chest or irregular in waveform. Also, if the
user has had recent heart problems, surgery, or other various
differentiating factors, they might cause a problem. If you are
experiencing difficulties in picking up a steady signal, you may want
to try your monitor on another person, or try positioning the belt
higher on your chest, or shifting it more to the left or right of your
chest (instead of centering the logo).
Blank screen or missing digits?
This can be an indication of mechanical shock damage, a dead
battery or possibly moisture damage. If this occurs, you could first try
a Global Reset (see below) otherwise send it in for service. Repairs
should only be done by a Vetta Dealer or a Vetta service center.
Stuck or Erratic Display?
If your monitor should ever get stuck or act erratically due to drop-
ping it, static shock or some other unforeseen reason, the Global
Reset feature will allow you to reset the unit and return all settings
back to their internal defaults. To perform this function press and
hold both buttons at once. Caution: THIS WILL CLEAR EVERYTHING!
including all of your personal settings.
My heart rate readings act strange while in my car or on an air-
plane.
Though the HR427 is designed with high integrity
interference elimination circuitry, extremely excessive electrical or
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the previous data will remain in the memory recall displays until it is
replaced with new data by restarting the stopwatch and recording
a new workout.