User's Manual

E-30
If this happens:
No heart rate appears on
the display, or displayed
values are excessive or
vary widely.
Heart rate measurement
suddenly stops
automatically.
Interference in the signal
from the chest strap.
Check this:
첸 Do you have heart trouble?
• Normal readings are not possible if you
have a heart abnormality that causes
changes in the waveform of an
electrocardiograph, or if you are suffering
from arrhythmia.
첸 Is the watch too far from the chest strap?
• The maximum allowable distance between
the strap and watch is about 90 cm (35.4
in). Communication is not possible when
they are too far apart.
첸 Do you have a hairy chest?
• Hair on the chest can interfere with heart
beat detection.
첸 Did more than one minute pass without the
watch detecting any signal from the chest
strap?
• This will cause measurement to stop
automatically. Restart the measurement
operation.
첸 Did the battery of the chest strap or watch
go dead during measurement?
• The RECOV indicator will appear on the
watch’s display when its battery is low. If
the RECOV indicator appears frequently,
have the watch’s battery replaced.
• If communication is not possible and the
RECOV indicator is not displayed, it could
mean that the chest strap battery is dead
or that the system is malfunctioning. Take
the watch in to your dealer or CASIO
distributor.
Important!
• Data in the watch’s memory will be deleted
when you have the battery replaced.
첸 Is someone nearby using the same type of
watch as this one?
• See “Anti-interference Code” on page
E-27 for more information.