Page 2
Timex ® Fitness Sensors Heart Rate Sensor Speed + Distance Sensor Watches are for more than keeping time. Digital technology gives your watch the ability to display your heart rate or measure your speed and distance traveled. These functions require the use of external modules that transmit information wirelessly to your watch.
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.
battery has been inserted correctly. Use a coin to open the battery compartment cover (back of transmitter). • Insert new battery (CR2032 or equivalent) with “ • Push the reset button next to the battery. Use a toothpick or straightened paper clip. •...
Sensor calculates its position relative to the GPS satellites. The text “SEARCHING” may appear on the watch display if using a compatible Timex® watch. • The status indicator light will flash green when the S+D Sensor has successfully acquired signals from the satellites. Speed and distance information is now being transmitted to the watch (or other device).
Wearing the S+D Sensor on your upper arm • Loosen adjustable armband and wrap the Sensor around your upper arm. • Pull armband so that it fits snugly around your arm and fasten with the hook and loop closure. • If the armband is not attached to the Sensor, rethread with the back of the case removed from the unit (see diagrams at...
Page 7
PROBLEM • Watch displays FATAL GPS ERROR message. SOLUTION • The S+D Sensor is damaged; contact Timex Customer Service. S+D Sensor Battery Life and Replacement The batteries in the S+D Sensor will last approximately 12 hours. The S+D Sensor itself does not indicate the condition of its batteries, except if the batteries are completely exhausted (as noted in the section “Operating the S+D Sensor”).
Timex and its worldwide affiliates will honor this International Warranty. Please note that Timex may, at its option, repair your product by installing new or thoroughly reconditioned and inspected compo- nents or replace it with an identical or similar model. IMPORTANT: p.s.i.a.* Water Pressure...
Page 9
EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABIL- ITY OR FITNESS FOR PARTICULAR PURPOSE. TIMEX IS NOT LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some countries and states do not allow limitations on implied warranties and do not allow exclusions or limitations on damages, so these limitations may not apply to you.
Page 10
Service If your Sensor should ever need servicing, send it to Timex as set forth in the Timex International Warranty or addressed to: HotLine Watch Service P.O. Box 2740 Little Rock, AR 72203. Street address: HotLine Watch Service 1302 Pike Ave.
Page 11
Caution: Any changes or modifications to the equipment listed above, not expressly approved by Timex Corporation, could void the user’s authority to operate this equipment. Industry Canada Notice: This Class B digital apparatus complies with Canadian ICES-003.
Need help?
Do you have a question about the M821 and is the answer not in the manual?
Questions and answers