Polar s720i question

IanD wrote:
:: All,
::
:: Just purchased a Polar s720i and got everything installed. Checked
:: for the emitting lights on both the speed and cadence. After
:: pressing the red start button and acquiring a heartbeat. Once riding
:: however, I just do not recieve any changes to speed/cadence and
:: such. They just keep showing 00. I've got the bike/cadence function
:: turned on and have defined both bike 1 and bike 2. What else could I
:: be doing wrong ?
::

Did you check the distance between the speed/cadance sensors and the watch?
there is a limit...are you using the bike mount?

::
:: Thanks,
::
:: Ian

IanD said:

Just purchased a Polar s720i and got everything installed. Checked for
the emitting lights on both the speed and cadence. After pressing the
red start button and acquiring a heartbeat. Once riding however, I
just do not recieve any changes to speed/cadence and such. They just
keep showing 00. I've got the bike/cadence function turned on and have
defined both bike 1 and bike 2. What else could I be doing wrong ?

You have to press the red button twice. The first press puts it in
"measure mode", where it acquires the heart rate. Once it has found
a heart rate, the second press starts the stopwatch and begins
recording speed/cadence.

Alternately, you can set autostop/start on. This will start and stop
the stopwatch automatically with movement of the bike.
--
terry morse Palo Alto, CA http://bike.terrymorse.com/

IanD said:

All,

Just purchased a Polar s720i and got everything installed. Checked for
the emitting lights on both the speed and cadence. After pressing the
red start button and acquiring a heartbeat. Once riding however, I
just do not recieve any changes to speed/cadence and such. They just
keep showing 00. I've got the bike/cadence function turned on and have
defined both bike 1 and bike 2. What else could I be doing wrong ?

Thanks,

Ian

Did you select bike 1 or bike 2? There is a 'no bike' mode. In that mode
speed and cadence is not displayed/recorded.

Lou

Quoted message said:

Just purchased a Polar s720i and got everything installed. Checked

for

Quoted message said:

the emitting lights on both the speed and cadence. After pressing

the

Quoted message said:

red start button and acquiring a heartbeat. Once riding however, I
just do not recieve any changes to speed/cadence and such. They just
keep showing 00. I've got the bike/cadence function turned on and

have

Quoted message said:

defined both bike 1 and bike 2. What else could I be doing wrong ?

The red light only indicates that the sensor picks up the wheel- or
crankmagnet, it's not an indication that the watch receives data from
the sensor. The distance between watch and sensor is propably too big,
or the sensors are placed in such a way that too many parts of the
bike are between watch and sensor. It's possible to increase the
sending power of a sensor by changing the jumper setting inside the
sensor, i think it's default in the low position for the speed sensor
and medium position for cadence.

"IanD" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

All,

Just purchased a Polar s720i and got everything installed. Checked

for

Quoted message said:

the emitting lights on both the speed and cadence. After pressing

the

Quoted message said:

red start button and acquiring a heartbeat. Once riding however, I
just do not recieve any changes to speed/cadence and such. They just
keep showing 00. I've got the bike/cadence function turned on and

have

Quoted message said:

defined both bike 1 and bike 2. What else could I be doing wrong ?

Thanks,

Ian

An update for all...

1) I've measured all distances applicable (magnet to reciever,
recieved to hrm the supplied bike mount) and all measurements are
within the specified limits

2) I've got the speed sensor directly under the brakes, as close as
possible to the hrm location. I've got the cadence sensor on the
non-drive side down tube directly below the my Tacx water bottle
mounts.

3) I've defined bike 1 & bike 2 and have selected bike 1.

4) I'm pretty sure I set the autostart feature 'ON' but I will check
again.

I will try again when I get home - thanks for all your help everyone!

Ian

Quoted message said:

2) I've got the speed sensor directly under the brakes, as close as
possible to the hrm location. I've got the cadence sensor on the
non-drive side down tube directly below the my Tacx water bottle
mounts.

If it's too close to the brake it could be the brake is obstructing
the signal.
Maybe test first with the watch near the sensor while spinning the
wheel and work from there.

"IanD" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

An update for all...

1) I've measured all distances applicable (magnet to reciever,
recieved to hrm the supplied bike mount) and all measurements are
within the specified limits

2) I've got the speed sensor directly under the brakes, as close as
possible to the hrm location. I've got the cadence sensor on the
non-drive side down tube directly below the my Tacx water bottle
mounts.

3) I've defined bike 1 & bike 2 and have selected bike 1.

4) I'm pretty sure I set the autostart feature 'ON' but I will check
again.

I will try again when I get home - thanks for all your help

everyone!

Quoted message said:

Ian

I've been using a 710 now for almost 2 years, and some positioning
experience from my 2 bikes (I move the computer from one bike to the other,
and each bike has it's own set of speed/cadence sensors)....

- The bike mount for the computer is just to the right of my stem.

- The speed sensor is on the right side of the fork, pointing forward from
the fork, about 4 inches down from the crown (some frame materials like Ti
could obstruct signal, as could all of the cables and brake HW).

- Cadence sensor is on the downtube, also pointed toward the rear, on the
"left side", with the magnet about 2.5 inches from the end of the left
crank. It juts out a bit from the frame, but it does not get in the way of
anything, and I noticed to get a good reading on the cadence, the sensor has
to be really close to the crank magnet.
(basically, make sure the lettering on the sensors is on the "outside", away
from the frame side...)

As other posters have said, the light just indicates the sensor is picking
up the magnet passing by.

You need to see if you have autostart on, and if so, when it starts picking
up the speed sensor, it will kick on the ride/stopwatch timer. Note that
the cadence sensor will not start the timers (at least on the 710, not sure
about the 720). Otherwise you need to hit the big red button a second time,
to start the timers.

My best suggestion for you is to just play with it on the work stand and
spin the wheel after you see the lights, perhaps even without the computer
mounted (holding it near the handlebar, for example), to see if you can get
a speed reading. (Also, did you set your wheel measurements?)

I also noticed that if I moved the computer to the left side of the stem, I
don't get as good signal reception. Not quite sure why this would be, but
on the right side of the stem, I have no complaints. Maybe it's because I'm
right handed? <grin>

Hope this helps....

Dave

"IanD" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

An update for all...

1) I've measured all distances applicable (magnet to reciever,
recieved to hrm the supplied bike mount) and all measurements are
within the specified limits

2) I've got the speed sensor directly under the brakes, as close as
possible to the hrm location. I've got the cadence sensor on the
non-drive side down tube directly below the my Tacx water bottle
mounts.

3) I've defined bike 1 & bike 2 and have selected bike 1.

4) I'm pretty sure I set the autostart feature 'ON' but I will check
again.

I will try again when I get home - thanks for all your help everyone!

Ian

All,

Just wanted to let you know I figured out what the problem was - I had
turned on the Power feature effectively turning off cadence/speed.
Maybe sometime I'll read the damn manual.

Thanks all!