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Weird computer problem(10 posts)

Weird computer problemPaulCL
Aug 22, 2001 9:06 AM
I have a three year old Cateye Astrale. Over the last three rides, my mileage seems to have come up short. On the end of most rides, I have to crank up a .9 mile (very steep) hill - so I usually set the computer to zero and time myself. The computer only recorded .64 miles?? This AM, on what I thought was a 35 mile ride, the computer only picked up 29.8 miles??

I have not noticed any 'blanking' of the screen that might indicate a problem with the pickup - no sudden drop in displayed speed. Over the last few rides, my cadence (a seperate sensor on the left crankarm) has blanked out for a few seconds at a time. But the cadence sensor has nothing to do with mileage. I put a new magnet on the wheel about two weeks ago for the speed/mileage pickup because I had a pickup problem with the old one.

Any ideas?? Battery dieing?? Bad connections?? Drain bamage???
re: Weird computer problemChen2
Aug 22, 2001 9:33 AM
Could it be that you have the wrong circumference number in the computer's memory? For 700 X 23 tires I have found that a 2088 gives me accurate distances.

Slip the computer off of the base plate and see if the contacts are corroded. I've heard that a SMALL amount of vasolene on the contacts can help.

As a side note, if you glue a small round magnet to the end of you pedal spindle you can remove that ugly magnet and cable tie from your crank arm. Just reset the cadence pick-up to match the magnet.
replace the battery, toocory
Aug 22, 2001 11:07 AM
a lot of minor computer glitches are the result of a fading battery. I've almost never had a problem that didn't get well with a new one.
Battery replacementPaulCL
Aug 22, 2001 11:15 AM
I'll probably do this. The only negative is the losing of all of my mileage data for the year. Oh well...I guess I will just write them down.
Battery replacementChen2
Aug 22, 2001 2:34 PM
It should hold its memory long enough to change the battery. I just did this last week with my Astrale, didn't lose anything. Have the new battery ready to install before you pull the old one, and try to not touch the battery with your bare fingers.

I've had the problem that you've described, when riding in the rain, which equates to bad contacts. Also check to see that the magnet passes within 1/8th inch of the little slot on the sensor. Changing the battery is also a good idea. I usually get two seasons on a battery.

Enter mileageTFerguson
Aug 23, 2001 5:37 AM
On most, and I believe the Astrale, you can re-enter the odometer reading so that you will not lose your total.
Aug 24, 2001 5:39 PM
I put in a new battery, but I can't figure out how or if I can re-enter my mileage. There is nothing in the manual. I think I am out of luck. Any ideas?
It's in the manualCliff Oates
Aug 24, 2001 9:29 PM
From the on-line manual at

How to replace the battery (Fig.6)

If the display becomes invisible from the front, it is time for replacing battery.
Prepare a new battery (CR2032) in advance, before taking out the old battery. Insert a new battery so that it is tightly fitted to the contact, as shown in the figure. When replacing, be careful not to press the buttons. Replacement must be done promptly (within 20 seconds).
After replacement, don't press AC button, because the data including total distance (odometer) is continuously measured.

However, the following malfunction might occur after replacement:
No display appears.
Unusual display appears.
Display is O.K. but button don«t work. In the above cases, press AC button so that display / buttons returns to normal. (If AC button is pressed, all the data including odomater is erased. Please refer to "Main Unit Preparetion" in the operating instructions.)
Regrettfully, it's NOT in the manualPaulCL
Aug 25, 2001 5:17 AM
I know how to replace the battery. The mileage stayed the same. Problem: per the manual, if I am having readout problems, they may be due to static electricity...therefore...I must push the "all clear" button and start anew. My question is if it is possible to re-enter previous mileage numbers into a "cleared" cyclocomputer. I think I am out of luck.

Besides...I actually did a measurement of my wheel circumference instead of guestimating the numbers from the manual. I was way off. My new, correct, circumference was much smaller than my old guess. I wonder how much, and which direction, that will affect my speed and mileage.
What's in the manual is in the manualCliff Oates
Aug 25, 2001 6:09 AM
What's not in the manual is the suggestion that the mileage can be manually set. If you have to press all clear, then the cumulative mileage is lost. FWIW, I'm using Cateye Mity3 computers on my bikes, and mileage can be manually entered on these.