View the manual for the Polar M21 here, for free. This manual comes under the category heart rate monitor and has been rated by 2 people with an average of a 7.3. This manual is available in the following languages: English. Do you have a question about the Polar M21 or do you need help? Ask your question here
| Brand | Polar |
| Model | M21 |
| Product | heart rate monitor |
| Language | English |
| Filetype | User manual (PDF) |
Can't find the answer to your question in the manual? You may find the answer to your question in the FAQs about the Polar M21 below.
As an adult, it is recommended to do moderately intensive exercise for at least 2.5 hours per week. Preferably spread over several days.
An adult's resting heart rate is between 60 and 100 beats per minute.
As a rule of thumb for your maximum heart rate, you can use 220 minus your age.
To troubleshoot inaccurate heart rate measurements with the Polar M21 heart rate monitor, you can follow these steps: 1. Check for strong electromagnetic signals: If your heart rate reading becomes erratic or extremely high, it may be due to strong electromagnetic signals nearby. Check your surroundings and move further away from any potential sources of disturbance. 2. Reset the heart rate monitor: If there are no reactions to any buttons or if the display is blank, you can try resetting the Polar M21. Press the RESET button with a pen tip, and the display will become full of digits. Then, press any of the four buttons once to enter the Time of Day display. If you don't press any button within one minute after the reset, the wrist receiver will go into battery-saving mode. 3. Wake up the monitor from battery-saving mode: If the display is blank or fading, it may be in battery-saving mode. Wake it up by pressing the START/STOP/OK button twice. The monitor will enter the Time of Day display. If the digits fade when using the backlight, it may indicate a discharged battery. Have the batteries checked. 4. Consider professional service: If the battery of the wrist receiver needs to be replaced, it is recommended to have the service done by an authorized Polar Service Center. This ensures that the warranty remains valid and that the monitor is not affected by incorrect repair procedures. The service center will also test the water resistance and perform a full periodic check of the monitor. By following these troubleshooting steps, you can address inaccurate heart rate measurements with the Polar M21 heart rate monitor.
If the Polar transmitter battery in the heart rate monitor is not lasting as long as expected, you can take the following steps: 1. Check the estimated battery life: The Polar transmitter has an estimated average battery life of 2500 hours of use. If you have exceeded this duration, it may be time to replace the transmitter. Contact your distributor or dealer for a transmitter replacement. 2. Consider normal use: The estimated average battery life of the Polar wrist receiver is 1 year in normal use, which is defined as 2 hours per day, 7 days a week. Excessive use of the backlight and alarm signals can drain the battery more rapidly. 3. Avoid unauthorized battery replacement: To ensure the water resistance properties and the use of qualified components, it is recommended to have the wrist receiver battery replaced only by an authorized Polar Service Center. They will also perform a full periodic check of the Polar Heart Rate Monitor. 4. Seek professional service: If your Polar Heart Rate Monitor requires service or if you have any concerns about the battery life, refer to the Customer Care Charter to contact an authorized Polar Service Center. Unauthorized service may compromise the water resistance of the device. By following these steps, you can address the issue of the Polar transmitter battery not lasting as long as expected in your heart rate monitor.
To troubleshoot issues with the elastic strap of the Polar M21 heart rate monitor, you can follow these steps: 1. Ensure proper attachment: Attach the transmitter to the elastic strap securely. 2. Adjust the strap length: Adjust the strap length to fit snugly and comfortably around your chest, below the chest muscles. Lock the buckle to secure it in place. 3. Wet the electrode areas: Lift the transmitter off your chest and wet the grooved electrode areas on the back of it. 4. Check electrode contact: Make sure that the wet electrode areas are firmly against your skin and that the Polar logo is in a central upright position. 5. Wear the wrist receiver correctly: Wear the wrist receiver as you would wear an ordinary watch. If you go biking, you may attach the wrist receiver to a Polar Bike Mount. Keep the wrist receiver within the transmission range of 3 feet (1 meter). 6. Maintain electrode and battery life: After exercising, wash the transmitter carefully with a mild soap water solution, rinse it with pure water, and dry it carefully. By following these steps, you can troubleshoot issues with the elastic strap of the Polar M21 heart rate monitor and ensure proper functionality during your workouts.
If the wrist receiver of the Polar M21 heart rate monitor is not displaying the correct heart rate information, you can troubleshoot the issue by following these steps: 1. Check for strong electromagnetic signals: If the heart rate reading becomes erratic or extremely high, it may be due to strong electromagnetic signals nearby. Check your surroundings and move further away from any potential sources of disturbance. 2. Reset the wrist receiver: If there are no reactions to any buttons or if the display is blank, you can try resetting the Polar M21. Press the RESET button with a pen tip, and the display will become full of digits. Then, press any of the four buttons once to enter the Time of Day display. If you don't press any button within one minute after the reset, the wrist receiver will go into battery-saving mode. 3. Wake up the wrist receiver from battery-saving mode: If the display is blank or fading, it may be in battery-saving mode. Wake it up by pressing the START/STOP/OK button twice. The wrist receiver will enter the Time of Day display. If the digits fade when using the backlight, it may indicate a discharged battery. Have the batteries checked. 4. Minimize interference: The wrist receiver may pick up signals from other transmitters within a range of 3 feet (1 meter). If you are using exercise equipment with electronic or electrical components, such as LED displays or motors, it may cause interference. Try relocating the wrist receiver to an area where it displays no stray readings or flashing of the heart symbol. If the interference persists, the exercise equipment may be too noisy for wireless heart rate measurement. By following these steps, you can troubleshoot issues with the wrist receiver of the Polar M21 heart rate monitor and ensure accurate heart rate information display during your workouts.
To troubleshoot any technical issues with the Polar M21 heart rate monitor, you can follow these steps: 1. Check for crosstalk: The Polar wrist receiver in non-coded mode can pick up signals from other transmitters within a range of 3 feet (1 meter). If you are getting incorrect heart rate readings, it may be due to crosstalk. Try using the heart rate monitor away from other transmitters or switch to coded mode if available. 2. Minimize interference from exercise equipment: Some exercise equipment with electronic or electrical components, such as LED displays or motors, can cause interference with the heart rate monitor. To minimize this, try relocating the wrist receiver to an area where it displays no stray readings or flashing of the heart symbol. Avoid placing the wrist receiver right in front of the display panel of the equipment. 3. Consult a doctor if necessary: Before starting a regular exercise program, it is recommended to answer health status checking questions. If you answer "yes" to any of the questions, it is advisable to consult a doctor before using the heart rate monitor. By following these steps, you can troubleshoot and address any technical issues with the Polar M21 heart rate monitor during your workouts.
Yes, the manual of the Polar M21 is available in English .
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Number of questions: 1How do I read the heart rate