How The Digital Heart Rate Monitor Works; Maintenance; Transmitter Battery Life And Replacement - Timex M821 User Manual

Heart Rate Monitor

How the Digital Heart Rate Monitor Works

The Heart Rate Monitor is a combination of a Heart Rate Sensor
and a sport watch. The Heart Rate Sensor attaches to your chest
and measures the electrical signals generated by the heart as it is
beating. Using this information, it then calculates your heart rate
and transmits it to your watch. You simply glance at the watch
during exercise/training to make sure you are in the appropriate
heart rate range to maintain or improve your fitness level.
How to Use the Digital Heart Rate Monitor
1. Wet the Heart Rate Sensor pads. THIS IS ESSENTIAL for proper
operation of the Heart Rate Monitor.
2. Put on the chest strap. Fasten the strap
snugly around your chest, just below
the breasts. Be sure the transmitter is
centered on the chest and is right side
up so the logo can be read by someone
facing you.
3. Start the Heart Rate Monitor: Refer to the
user manual for your watch for detailed
instructions on viewing heart rate data.
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Warning
This is not a medical device and is not recommended for use
by persons with serious heart conditions. You should always
consult your physician before beginning or modifying an
exercise program.
Interference with the radio signal, poor contact between your skin
and the chest strap, and other factors may prevent accurate
transmission of heart rate data.

Maintenance

Rinse Heart Rate Sensor and strap in fresh water to avoid build up of
materials that can interfere with the measurement of your heart rate.

Transmitter Battery Life and Replacement

Battery life of the transmitter should exceed two years, based
upon using it an hour a day. Greater usage will shorten the battery
life. Replace transmitter battery when any of the following occur:
• The watch no longer receives heart rate information from the
chest transmitter when properly worn on the chest.
Sensor Pads
• Error messages (COMM ERR, SIGNAL LOST) appear with increased
frequency on the display.
Battery Replacement
NOTE: You'll need to have a device (such as a watch) capable
of displaying heart rate information to verify that the new
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