Polar RC3 GPS user manual Charge is critically low. The training computer

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Recording stopped, Battery Empty is displayed	The charge is critically low. The training computer
	stops recording the training session and saves the
	training data and then goes to sleep mode. Charge
	the training computer. For more information, see
	Training Computer Battery (page 9).
The training computer display is blank	The training computer battery is empty and it has
	gone to sleep mode. Charge the training computer.
	If the battery is totally drained, it may take a while
	for the charging animation to appear on the
	display. For more information on charging the
	battery, see Training Computer Battery (page 9).
Check heart rate sensor! is displayed	• Make sure the heart rate sensor strap has not
	loosened during exercise.
	• Make sure the electrodes of the heart rate sensor
	are wet.
	• Make sure the electrodes of the heart rate sensor
	are clean and undamaged.
	If you have done all of the above-mentioned
	actions, and the message still appears and heart
	rate measurement does not work, the battery of
	your heart rate sensor may be empty. For further
	information, see Batteries (page 51).
Check speed sensor! is displayed	Make sure the position and distance of the sensor
	to the magnet are appropriate. If the message still
	appears you may have exceeded 3000 riding hours
	and the battery is empty.
Check cadence sensor! is displayed	Make sure the position and distance of the
	cadence sensor to the crank magnet are
	appropriate. If the message still appears, you may
	have exceeded 3000 riding hours and the battery
	is empty.
Check stride sensor! is displayed	Make sure the sensor is correctly positioned on
	your foot. If the message still appears, the battery
	may be empty. See the user manual for Polar s3+
	stride sensor for instructions on changing the
	battery.
The heart rate reading becomes erratic, extremely	• Make sure the heart rate sensor strap has not
high or shows nil (00)	loosened during exercise.
	• Make sure the textile electrodes in the sports
	apparel fit snugly.
	• Make sure the electrodes of the heart rate sensor
	strap are moistened.
	• Make sure the heart rate sensor is clean. Strong
	electromagnetic signals can cause erratic
	readings. For further information, see
	Precautions (page 52).
	• If the erratic heart rate reading continues despite
	moving away from the source of disturbance,
	slow down your speed and check your pulse
	manually. If you feel it corresponds to the high
	reading on the display, you may be experiencing
	cardiac arrhythmia. Most cases of arrhythmia are
	not serious, but consult your doctor nevertheless.
	• A cardiac event may have altered your ECG
	waveform. In this case, consult your doctor.

Important Information 57