Preparing the computer, Velo 9 / velo 7 eng 3 operation test, Tire circumference – CatEye CC-VL520/CC-VL820 [Velo 7/Velo 9] User Manual

Page 3

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VELO 9 / VELO 7

ENG

3

Operation test

After installed, check that the computer displays the speed by turning
the front wheel. When it is not displayed, check the installation condi-
tions and again (page 2).

Preparing the computer

Perform the clear all data operation as shown below, when you use the
unit for the fi rst time or restore the unit to the condition checked at the
factory.

1

Clear all data (initialization)

Press the AC button on the back of the computer.

2

Select the speed unit

Select “km/h” or “mph”.

MODE

km/h mph

SET

Register the
setting

3

Set the tire size

Set the tire size by either one of the following methods.

Simple setting (select from the tire size)

Pressing the MODE button changes 26” 700c
27” 205[] 16” 18” 20” 22”

24” 26” in order. Select the tire size (inch) of

your bicycle, and then press the SET button.

* Generally, the tire size is indicated on the side

of the tire.

MODE

Switching size

SET

Register
the setting

MODE

Press and hold to the
MODE button with
205[]” displayed to
change to the wheel
size entry screen.

Detailed setting (enter the numeric value of the tire circumference)

* Entering the tire circumference ensures more accurate measure-

ments.

1

With 205[] displayed on the screen, press and
hold the MODE button.

2

Pressing the MODE button increases the nu-
meric value flashing, whereas pressing and
holding the MODE button moves the digit. En-
ter any value of the circumference in cm, and
then press the SET button.

* Use “Tire circumference reference table” as a

guide.

MODE

Increase
the value

MODE

Move digits
(Press &
hold)

SET

Register the
setting

AC

Tire circumference

You can fi nd the tire circumference (L) of your tire size in the chart be-
low, or actually measure the tire circumference (L) of your bicycle.

How to measure the tire circumference (L)

For the most accurate measurement, do a wheel roll
out. With the tires under proper pressure, place the
valve stem at the bottom. Mark the spot on the fl oor
and with the rider’s weight on the bike, roll exactly one
wheel revolution in a straight line (until the valve comes around again to
the bottom). Mark where the valve stem is and measure the distance.

Tire circumference reference table

* Generally, the tire size or ETRTO is indicated on the side of the tire.

L cm

ETRTO

Tire size

L (cm)

40-254 14x1.50

102

47-254 14x1.75

110

40-305 16x1.50

119

47-305 16x1.75

120

54-305 16x2.00

125

28-349 16x1-1/8

129

37-349 16x1-3/8

130

32-369 17x1-1/4 (369)

134

40-355 18x1.50

134

47-355 18x1.75

135

32-406 20x1.25

145

35-406 20x1.35

146

40-406 20x1.50

149

47-406 20x1.75

152

50-406 20x1.95

157

28-451 20x1-1/8

155

37-451 20x1-3/8

1625

37-501 22x1-3/8

177

40-501 22x1-1/2

179

47-507 24x1.75

189

50-507 24x2.00

193

54-507 24x2.125

197

25-520 24x1(520)

175

24x3/4 Tubular

179

28-540 24x1-1/8

180

32-540 24x1-1/4

191

25-559 26x1(559)

191

32-559 26x1.25

195

37-559 26x1.40

201

40-559 26x1.50

201

47-559 26x1.75

202

50-559 26x1.95

205

54-559 26x2.10

207

57-559 26x2.125

207

58-559 26x2.35

208

75-559 26x3.00

217

28-590 26x1-1/8

197

ETRTO

Tire size

L (cm)

37-590 26x1-3/8

207

37-584 26x1-1/2

210

650C Tubular

26x7/8

192

20-571 650x20C

194

23-571 650x23C

194

25-571 650x25C

26x1(571)

195

40-590 650x38A

213

40-584 650x38B

211

25-630 27x1(630)

215

28-630 27x1-1/8

216

32-630 27x1-1/4

216

37-630 27x1-3/8

217

40-584 27.5x1.50

208

50-584 27.5x1.95

209

54-584 27.5x2.1

215

57-584 27.5x2.25

218

18-622 700x18C

207

19-622 700x19C

208

20-622 700x20C

209

23-622 700x23C

210

25-622 700x25C

211

28-622 700x28C

214

30-622 700x30C

215

32-622 700x32C

216

700C Tubular

213

35-622 700x35C

217

38-622 700x38C

218

40-622 700x40C

220

42-622 700x42C

222

44-622 700x44C

224

45-622 700x45C

224

47-622 700x47C

227

54-622 29x2.1

229

56-622 29x2.2

230

60-622 29x2.3

233

MODE

AC

SET

Battery case cover

Contact

4

Set the Clock

Pressing and holding the MODE button switches the
display to “Display format”, “Hour”, and “Minute” in
order.

MODE

12h 24h, or

increases the
value

MODE

Switch the
screen or move
digits

5

Press the SET button to complete setting

Press the SET button with the current clock displayed. Then, the unit
setting is completed, and the unit changes to the Measuring screen.

SET

Register the setting
(Finish)

Display format

Hour

Minute

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