Unit is measuring cadence and heart rate, but is not measuring speed, distance or ride time.

some error is normal. You need to state how much as a percentage. 10% 50%?

The automatic shifter mechanism on these bikes is driven by centrifugal force of weights near the rear axle. As they spin, they expand and move you to a higher gear. Although it's not a precise relationship, the mechanism is designed to shift to a gear that will give you a pretty constant pedal rpm - probably around 50 rpm. - regardless of the speed that the bike is moving. This is because as you ride longer distances your legs are most efficient at pedaling at a fairly constant speed (bikers call this cadence). Bikers who ride a lot find that these automatic shifters tend to keep you pedaling too slow (they find 70 rpm or even higher to be a better cadence.) However, if the cadence is too fast for you, you could alter the shift pattern by adding a bit more weight to the weights that are already there. You could do this with fishing weights and wire ties. This would give you a slower cadence. But as you ride the bike more you will probably find that you will want to remove the extra weights. I suggest that you keep riding without adding the weights and you will find that the preset cadence becomes more comfortable with time. It is also easier on your knees to have a faster cadence with lower pedal pressure. Good luck, Al K

Since your Cadence is working then there is a problem with the actual speed/ distance sensor. First make sure that in your settings you have speed turned on. If so then...
1) Your battery may be dead = Replace CS sensor
2) The distance of the sensor and magnet is not set correctly = make sure magnet on spokes and sensor are within 1-2mm of each other.

Polar can fix the strap, you need to send into an authorized service center. They replace the entire strap unit. If you send into Polar to get the strap fixed, then you can send in the sensor unit as well for diagnosis if you want. But if #2 doesn't fix, then it's #1 and they will just tell you to buy a new one anyway.

2 Seperate issues:

Heart Rate - The CS200cad uses a coded transmission for the HR, When you have a HR that spikes that high, it is because for some reason the signal has not coded correctly. Here are a number of ways to help with that issue.
1. Make sure you have good contact between your chest strap and your skin.
2. Make sure the Heart rate sensors on the strap are wet. Or use a conductive cream to improve contact.
3. Make sure the strap is on correctly. Up high on the chest just under breasts, Polar symbol centered on chest and upright. Strap tight enough to keep from slipping
4. If the strap is older, make sure it is clean. Salt can build up in the strap.
5. If the strap is over 2 years old consider replacing.
6. Check Battery

For the Speed/ Distance - Same sensor (front) make sure that the magnet on the wheel is within 1-2mm of the Fork sensor. The magnet should align in the middle of the sensor, with the sensor just slightly angled into the magnet. When the magnet and sensor have a good signal a small red light will flash and you may hear a click when the wheel is rotated. If none of this works you have a low battery and will need to replace that front sensor.

hi, the console can display speed and distance in either kilometers or miles!
step 1/ move the key and hold down the stop button.
step2/ reinsert the key into the console, after you hear a bleep tone release the stop button and an "m" for kilometers or an "e" for english miles will appear in the display. press the speed in-crease button to change the unit of measurement.
step 3/ when you have chosen the miles take the key off and reinsert it. hopefully you should have changed your units to whatever you have chosen.

iSPINNING is compatible with most of the market-leading fitness heart rate monitors, including most Garmin, New Balance, Nike, Polar and Reebok models and enables you to customize dashboards and upload workouts on your iPhone to see and track fitness metrics, including:
? Current, Average and Maximum Heart Rate
? Time in Target Zones
? Calories Burned
? Cadence
? Speed
? Distance
? Power
? Elapsed and Remaining Exercise Time

Probably a poor connection somewhere. Inexpensive electronics are best just replaced when they develop problems.

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

The 705 comes in multiple versions from basic that will give you heart rate to a team garmin version that has the cadence, speed, calories, etc. As for power meters the 705 is 3rd party compatible to show you watt measurements.
The following third-party ANT+Sport-enabled power meters are compatible with the Edge 705:

• iBike
• PowerTap
• Quark
• SRM

The ultimate goal of training with a heart monitor is to be able to run longer and faster with a lower heart rate. If you keep track of your results, there will be a couple of ways to see the progress. First, as you improve, you will see that running the same distances at the same heart rate will become easier. Effectively, you will be able to run faster for these distances without your heart having to work as hard. This is a direct reflection of increased efficiency of the heart. To see this, try running a set course - with your monitor - that is several miles long, and stick to a preset speed, perhaps your marathon pace. Then, under similar weather conditions, try the same course again a few weeks later. Run it at the same pace as you ran previously, and compare your heart rates for the two runs. If you've gotten fitter since your first run, your heart rate should be lower during your second. Another way to see results is to keep track of your resting heart rate by taking it down and recording it every morning before you get out of bed. Many trainers recommend that runners keep track of their RHR on a daily basis, and, as stated above in the RHR section, increased fitness should bring with it a lower RHR.

My solution included changing the battery in the cadence sensor (GSC10). You might not need to.
1. After changing battery, take bike outside. Turn on Edge 305 to acquire satellites (might not be necessary..)
2. Press reset button on GSC10. Should see red/green flash.
3. On Edge 305, go to SYSTEM.
4. Scroll down to ACCESSORIES.
5. On Accessory page, scroll to bottom, under Cadence Sensor, and press RESTART SCAN.
That fixed my Edge 305 - cadence and speed do appear now.