Precautions
• Do not concentrate too much on the computer operations
while riding.
• Be sure to securely mount the magnet, sensor and bracket
on your bicycle, and periodically check to insure they are
mounted securely.
• Used batteries must be disposed of properly and in accor-
dance with all local regulations.
• Do not leave the main unit exposed to direct sunlight. Never
disassemble the computer.
• To clean the computer, use mild soap and a soft cloth. Wipe
dry with a soft cloth. Paint thinner, benzine, alcohol or other
chemicals may damage the surface.
Bracket
Secure the wire along the fork with the nylon ties
(S) 9, and wind it round the front brake cable up
to the handlebar.
Apply the rubber pad 8 to the bracket 1, and fix it
with the screw.
*The band is adjustable. To release the band, pull
it while pushing the area marked with
.
Note: Allow enough wire clear-
ance in the area marked
with
to insure you can
turn the handlebars all the
way from side to side
without pulling the wire.
Main Unit
Slide the main unit until it clicks into position. The
contact is automatically connected. To remove,
slide it forward while pushing the lever.
Test
Install the main unit onto the bracket 1. Spin the
front wheel and see if the speed appears in the
display. If not, re-adjust the position of the sen-
sor 3 and the magnet 7 so that it meets the con-
ditions
A
and
B
in the “Important” column.
SETTING UP
1 Bracket 7 Magnet
2 Wire 8 Rubber Pad
3 Sensor 9 Nylon Tie S (3 pcs.)
4 Sensor Band A (L&S) 0 Nylon Tie L (1 pcs.)
5 Sensor Band B q Screw
6 Attachment for Aerofork
Installation
Important
Attach the sensor and the magnet
properly so that their positions meet
the following conditions
A
and
B
.
Align the magnet’s 7 center
and the sensor’s 3 marking
line while rotating the wheel.
The clearance between the sen-
sor 3 and the magnet 7 should
be less than 5mm.
Sensor
Attach the sensor 3 temporarily to
the inside of the right front fork.
• Applicable diameter of the sensor
band A 4:
(S) ------- 11-26ø front fork
(L) ------- 21-36ø front fork
• If the clearance between the sen-
sor 3 and magnet 7 is wide,
mount the sensor band 45 in the
opposite way as shown.
• In case of aerofork, apply the at-
tachment 6.
Magnet
Attach the magnet 7 to the right side spoke of the
front wheel. Adjust the position of the sensor 3 and
the magnet 7 so that it meets the conditions
A
and
B
in the “Important” column.
L(cm)Tire size
12 x1.75 94
14 x 1.50 102
14 x 1.75 106
16 x 1.50 119
16 x 1.75 120
18 x 1.50 134
18 x 1.75 135
20 x 1.75 152
20 x 1-3/8 162
22 x 1-3/8 177
22 x 1-1/2 179
24 x 1 175
24 x 3/4
Tubular
178
24 x 1-1/8 179
24 x 1-1/4 191
24 x 1.75 189
24 x 2.00 192
24 x 2.125 196
26 x 7/8 192
26 x 1(59) 191
26 x 1(65) 195
26 x 1.25 195
26 x 1-1/8 190
26 x 1-3/8 207
26 x 1-1/2 210
26 x 1.40 200
26 x 1.50 201
26 x 1.75 202
26 x 1.95 205
26 x 2.00 206
26 x 2.10 207
26 x 2.125 207
26 x 2.35 208
26 x 3.00 217
27 x 1 215
27 x 1-1/8 216
27 x 1-1/4 216
27 x 1-3/8 217
650 x 35A 209
650 x 38A 212
650 x 38B 211
700 x 18C 207
700 x 19C 208
700 x 20C 209
700 x 23C 210
700 x 25C 211
700 x 28C 214
700 x 30C 217
700 x 32C 216
700C Tubular 213
700 x 35C 217
700 x 38C 218
700 x 40C 220
Cross Reference
Table
CAT EYE MITY 3
CYCLOCOMPUTER
CC-MT300N
Instruction Manual
MITY 3
U.S. Pat. Nos. 4633216/4642606/5236759/5226340/5904442 and Pat. Pending
Design Patented
Copyright© 2001 CATEYE Co., Ltd.
CCMMT3N-011119 Printed in Japan 066600095 a
2
The speed sensor, handlebar bracket and wheel magnet
should be installed first.
NOTE: To utilize previously accumulated Odometer data, refer to
the section “Manually Replacing Mileage into Odometer”
described in the last section of this manual.
The following set up is required before use:
1. Find the Wheel Calibration Number
(Length of Tire Roll-Out)
Determine the length of the tire (Length in centi-
meters) from the Cross Reference Table. Alter-
nately, you can find the most accurate wheel cali-
bration number by rolling the tire on the ground.
In this method, properly inflate the tires, sit on the
bike and measure the distance of one wheel
length. This distance in centimeters is the most
accurate number. (Inches X 2.45 = Centimeters)
2. Perform the ALL CLEAR OPERA-
TION to clear the computer and
set the speed scale:
Press the SET Button while pressing the MODE
and START/STOP(S) Buttons (ALL CLEAR OP-
ERATION: Fig. 2). The entire memory of the
computer will be erased, and the complete
screen will light up and then all fade away, leav-
ing a flashing “K” on the screen. A press on the
MODE Button will display “K” and “M” alternately
(Fig. 3). Select your desired speed scale. Then
press the START/STOP(S) Button to set the
scale. The display moves to the next screen.
3. Set the Wheel Circumference.
The number “210” (typical wheel circum-
ference for 700x23C tires) will be dis-
played (Fig. 4).
Input the number from step 1 above.
Press the MODE Button to increase the num-
ber. Press the START/STOP(S) Button to
decrease it. You can fast forward the num-
bers by holding either buttons down.
Set the number by pressing the SET Button.
Your computer is now set up for riding.
G.Lower Display
(Selected Function)
H. Mode Button
I. S Button
J. SET Button
K. Battery Cover
L. Contact
Setting Up the Computer
A. Upper Display
(Usually Current
Speed)
B. Mode Symbol
C. Average Pace Arrow
D. Speed Scale
E. Auto Mode Symbol
F. Wheel Selection
Symbol
Setting the CLOCK
For setting the CLOCK, the TIME function must be turned off and
the speed scale symbol (either M for Miles or K for Kilometers)
must not be flashing (Fig. 5). The CLOCK is set to either 24-
HOUR or 12-HOUR depending on the SPEED SCALE selected.
In K (kilometers), a 24-HOUR CLOCK is selected, while in M
(miles), a 12-HOUR CLOCK is selected.
1. In the TIME Function(Tm), hold down the MODE Button, the
mark will appear. This is an indication that you are in the
CLOCK function.
2. Press the SET Button. The “HOURS” will flash. Use the MODE
Button to change/advance the number, and the ST./STOP(S)
Button to switch between “HOURS” and “MINUTES”.
3. Press the SET Button to set the CLOCK.
7
1
5
4
8
3
45
3
0
6
7
3
7
3
on back
Clock
L cm
SET
on back
SET Button
Press
Fig. 1
ALL CLEAR
OPERATION
K (km) = kilometer
M (mile) = mile
Fig. 3
Fig. 4
Setting Range: 100 - 300 cm
Increases the
number
B
1
2
A
B
A
center
marking line
front fork
less than 5mm
3
4
lever
slide
Fig. 2
1
2
4
5
7
3
8
6
9
q
0
1
2
3
4
9
1
8
spoke
In case of aerofork
pull
push
®
OK
spin
Fig. 5
Switching
of “Hours” and “Minutes”
Set Up Completed
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