CALIBRATION
ALL CLEAR.
You can clear Total Distance manually by holding down
the left button in the Total Distance (D) function until the test pattern
appears (10 seconds). This erases all stored data and resets the calibration
number to 2155 mm (Cyclometer 15). Calibration number is retained
with all clear in Cyclometer 25.
CLOCK SET AND POWER SAVER
BATTERY & TROUBLESHOOTING
TROUBLESHOOTING
Speed and distance seem too high or too low
Check calibration number
Confirm calibration number by tire roll-out
Check that receiver is parallel to nearest spoke
Check spacing between receiver and transmitter
No speed or distance
Check transmitter/receiver alignment and spacing
Check contacts on back of Cyclometer and on mount
and clean with a pencil eraser if necessary
Check for broken wire
No Average Speed, Trip Distance, or Ride Time
Hold right button then press left button in Total
Distance (D) to reset Auto Start-Stop
No display or display dim
Replace battery
Incorrect data or unusual display
Total reset–hold left button in Total Distance (D)
function until test pattern appears
Incorrect display after a new battery is installed
Remove battery, then reinstall after 15 seconds
INSTALLING A NEW BATTERY.
To re-
move the battery, pry up the cap on the back
of the Cyclometer with a screwdriver. Install
the new battery with its positive (+) side to-
ward the cap, then press in the cap with your
thumb. Use only an Avocet Cyclometer 15/
25 battery or equivalent (see specifications).
Removing the battery erases all stored data
and resets the calibration number to 2155.
After installing a battery, the Cyclometer dis-
plays the test pattern briefly, then goes into
miles/kilometers setup.
SETTING THE CLOCK.
(Cyclometer 25). Hold down the right but-
ton in any function to display the clock. Hold down the left button then
press the right button to reach clock adjust. The right digit will blink.
Change it with the right button. Press the left button to go to the next
digit. When you adjust the left digit, it will not change in the display.
You will have to confirm that this digit is correct after you exit clock set.
If it is incorrect, return to clock set, go to the left digit, and adjust it again
with the right button. Note that you cannot set the clock when the Cy-
clometer 25 is asleep with only the clock displayed.
AUTOMATIC POWER SAVER.
After no buttons have been pressed
and no wheel movement has been detected for 10 minutes, the display
will go blank (Cyclometer 15) or display only the clock (Cyclometer 25).
Power consumption is reduced by 50%. The normal display returns when
a button is pressed or the bicycle is moved.
Cyclometer 25 power
saver. Cyclometer 15
screen is blank.
MILES OR KILOMETERS.
Go to the Total Distance (D) function.
Hold down the left button for 12 seconds until the test pattern appears
and all stored data is cleared. Four seconds after releasing ‘mi’ or ‘km’
flashes. Press the right button to switch between miles and kilometers,
then complete calibration. With the Cyclometer 25 you can change be-
tween miles and kilometers without erasing stored data. Hold the left but-
ton in Total Distance (D) for six seconds and release when ‘mi’ or ‘km’
flashes. Switch between units with the right button. Stored maximum and
average speeds and distance data are automatically converted to the units
chosen when you use this method. Exit by pressing the left button.
PRECISE CALIBRATION.
For the most precise calibration of your Cyclometer, measure the
tire's ‘rolling circumference’ by the following method: Inflate your tires to your usual riding pres-
sure. Mark the ground under the valve stem when the stem is at its lowest point. Get on the bicycle
and have a helper push you in your normal riding position until the valve stem returns to its lowest
point. Take care that the tire travels in a straight line. Mark below the stem again, then measure the
distance in inches between the marks. Multiply your measurement by 25.4 to convert your measure-
ment to millimeters and get your calibration number. Record numbers for your different bicycles
and wheels below.
Bike/Wheel______________________________ Calibration #:____________________________
Bike/Wheel______________________________ Calibration #:____________________________
CALIBRATION NUMBERS.
The calibration number is wheel circumference in millime-
ters. This table is based on popular tire brands and assumes recommended inflation pressure and
a rider weight of 165 lbs. (75 kg). To account for your unique combination of weight, tire pressure,
and tire model, measure your tire circumference.
Tire Size
Number
20 x 1.75
1528 mm
24 x 1
1753
600 tubular
1759
650 tubular
1929
26 x 1
1913
26 x 1.25
1952
26 x 1.5
1986
Tire Size
Number
700 x 28
2096 mm
700 x 32
2116
700 x 38
2159
27 x 7/8
2077
27 x 1
2105
27 x 1 1/8
2123
27 x 1 1/4
2142
Tire Size
Number
26 x 1.95/2.0
2045 mm
26 x 2.1
2056
26 x 1
3
/
8
2068
700C tubular
2083
700 x 20
2081
700 x 23
2087
700 x 25
2091
Calibration number equals wheel circumference in inches multiplied by 25.4, or in millimeters.
CALIBRATION.
Find the calibration number that matches your tire size
from the table, or measure tire circumference by the precise calibration
method. Reach calibration from the Trip Distance function (d).
Cyclometer
15:
hold the left button until the calibration number 2155 shows in the
lower display and its right digit blinks (8 seconds).
Cyclometer 25:
hold the
left button until the calibration number 2155 shows in the lower display (4
seconds), release, then hold again 4 seconds until the right digit of the cali-
bration number blinks. Change the number with the right button. Press the
left button to go to the next digit. After adjusting all the digits, press the left
button to exit. To check the calibration number, hold the left button in Trip
Distance. After 4 seconds the calibration will appear, and it will remain dis-
played for 4 seconds after you release the button.
Change the blinking digit
of the calibration number
with the right button
