Road Cycling - Weird Computer Malfunction

I have a Cateye Enduro 8 computer on my bike.

Yesterday after I ride I was logging my info and it showed the Max Speed: 143.0 (that's M/H)

I thought: "WTF???" anyway the actually max time was 31.5 m/h

Today the computer was working fine again.

Anyone have any ideas as to what was wrong with it?? It's pretty new, just about 4 months old now.

EDITED
Thanks for pointing my mistake out, I did mean speed, not time.

Don't you mean max speed? Anyways, these things can happen if you encounter stray EM emissions. The speed sensor is typically a reed-relay that gets tripped by a magnet. If you run across a fairly high-rate pulsed magnetic field, it will throw off your computer for a small bit of time. Traffic sensors being mainly metal detectors will do this for instance. Metal detectors typically work by inducing a magnetic field in a body of metal and then reading the response in field flux. Here's my favourite result of encountering a traffic sensor...

http://www.neebu.net/~khuon/albums/visual_tao_of_cycling/FlightyDeck.jpg

Don't you mean max speed? Anyways, these things can happen if you encounter stray EM emissions. The speed sensor is typically a reed-relay that gets tripped by a magnet. If you run across a fairly high-rate pulsed magnetic field, it will throw off your computer for a small bit of time. Traffic sensors being mainly metal detectors will do this for instance. Metal detectors typically work by inducing a magnetic field in a body of metal and then reading the response in field flux. Here's my favourite result of encountering a traffic sensor...


Holy crap, that's just like what happened to my computer. Thanks for the info.

How come only the speed gets affected though? Never mind, I think I get it. I wonder where the sensor was though, because it's never happened before. (I did ride down to midtown though and probably passed one).

Happens to mine if I ever leave it lying in the house beside my mobile phone if its switched on.

WEIRD!! I never had that happen to mine yet...but I wish it would so I could brag as to how fast I can go!!!!!!!!!!!!

G'day.

My S720 goes beserk if I ride under tram lines.......HR, Speed, Cadence, everything. But I must admit its a buzz to be riding down the rode while the computer says 226.7 kmh,

cheers,

Hitchy

While stopped at a stoplight, you can actually watch your cordless speedometer racing. It is actually a pretty good way to find the sensor. If my speedometer reads between 20 and 40 mph, my crank is usually above the sensor, and I can trip the light.

http://www.neebu.net/~khuon/albums/visual_tao_of_cycling/FlightyDeck.jpg
Man, you must be pretty strong to pull that off :lol: I would be happy if I could go that fast -100