Manual Vetta RT255L Cycling Computer

Manual

Vetta’s RT200 series are the upgraded version of all RT series cycle computers. It is recommended that these

products are to be installed by a qualified bicycle retailer. Failure to read the instructions and/ or improper installation

of the device may void the warranty. If you have any doubts about the installation or the operations, contact your local

bicycle retailer for clarification.

WARNINGS & CAUTIONS

HEAD UNIT

COMPONENTS

RT255 RT255L

RT277 RT288 RT288L

1. Button

2. Button

3. Button

4. Button (RT255L/288L)

5. Main Display

6. Contact Pins (RT255/255L/277)

7. Battery Compartment

8. Battery Cap

Heavy Duty Metal Braided Cable

Wireless Transmission

Replaceable Front Cover

Screen Display Window

NiteLite w/ SmartLite

EZ Tire Set

Service Timer

Speed Comparator

Auto Awake & Start-up

Energy Efficient programmable Auto Start

Current Speed

Average/Maximum Speed

Ride Time

Cumulative Odometer

Trip Distance

Multi Freeze Frame Memory

Lap

Current/Average/Maximum Cadence

12/24 Hour Clock

FUNCTIONS / FEATURES

RT255/255L includes: 1 3 4 5 9 11 12 14 15

RT277 includes: 2 3 4 5 9 10 11 12 14 15

RT288/288L includes: 3 4 5 6 7 8 9 11 12 13

1. Wired Spd Sensor with Mounting Bracket

(with Heavy Duty Harness)

2. Wired Spd & Cad Sensor with Mounting Bracket

(with Heavy Duty Harness, for Rear Wheel Pick-up)

3. Extra Clear Front Cover

4. Bracket Rubber Pad

5. Bracket Rubber Pad (Riser Handlebar)

6. WL Wireless Speed Transmitter

7. Wireless Mounting Bracket

8. Wireless Transmitter Shim

9. Bladed Spoke Magnet

10. Composite Cadence Magnet

11. Spacer

12. Head Unit Battery (CR2032, 3-Volt)

13. Wireless Transmitter Battery (A23, 12-Volt)

14. Wire Securing Tape

15. Zip-Ties

1

2

3

4

RT255 RT255L RT277 RT288 RT288L

• •

••

••

•

•

•

•

••

••

• ••

••

• ••

••

••

• ••

••

• ••

••

• ••

••

• ••

••

• ••

••

• •

•

•

••

• ••

• ••

11 16 11 11 16

10 15 10 10 15

3 3 3 3 3

1.0

4

5

1

3

2

6

7

8

1

7 8 9

10

11 12 13 1514

2

4

3

5 6

LCD DISPLAY

1. Upper Display

2. Middle Display (Speed)

3. Lower Display

4. Service Timer/ Low Battery Icon

5. Speed Comparator Icon

6. Speed / Distance Units

7. Setup Mode Icon

8. Function Icons

9. RPM / RT/ PM/ TM Icon

10. Speed & Split Time Icon

11. Freeze Frame Memory Icon

12. Lap Icon

13. Auto Start Icon

1

2

5

6

7

8

9

10

11

13

12

4

3

Important: Do not use Zip-Ties, use the tapes provided with the package to hold wires to the frame, fork, bars or stem

to avoid damaging or cutting the wires accidentally. Make sure excess wire is taped down or wrapped around brake cable

housing to secure it.

BATTERY INSTALLATION

INSTALLATION

WIRED CADENCE SENSOR & MAGNET (

RT277)

Attach the Wired Cadence Sensor & Composite Cadence Magnet with the Zip-Ties supplied to the bicycle. Adjust the

sensor & magnet spacing with the spacer. Remove the Spacer after snugging the Zip-Ties down to hold the sensor in its

final position.

4

1

3

2

BUTTON FUNCTIONS

WIRED SPEED SENSOR & MAGNET (

RT255/255L)

Press momentarily

Button : Upper Screen Modes

Button : Lower Screen Modes

Button : F-Button or Lap Button

Button : NiteLite (RT255L/288L)

Press & hold for 2 seconds

Button : Recall Freeze Frame Memories or Lap Data

Button & when the lowest screen is in the CLK Mode: NOM Setup

Button & when the lowest screen is in the DST Mode: Reset ride data

to zero including the Frozen screens or Lap data

Button , & : All Clear Total Reset

Wired Cadence Sensor

Crank

Arm

Chain Stay

Spacer

Spacer

Tip

Alignment Mark

Crank Arm

Composite Cadence

Magnet

Wired Cadence Sensor

Zip-Tie

Composite

Cadence Magnet

Composite

Cadence Magnet

Composite

Cadence Magnet

Wired Speed Sensor

Wired Speed Sensor

Fork Leg

Bladed

Spoke Magnet

Bladed

Spoke Magnet

Bladed

Spoke Magnet

Bladed Spoke Magnet

Spoke

Magnet

Sweep Path

Zip-Tie

Spacer

Spoke

Spacer

Tip

Alignment Mark

Fig. A

1

2

3

4

3

1

1

1 2

2

3

2

Magnet Sweep Path

The RT200 series Head Unit use CR2032, 3-Volt Lithium button Cell batteries.

Battery Run Time (1 hour training / day): Approx.12 months (RT255/255L/277); Approx. 8 months (RT288/288L)

Important: Most cycle computer problems are caused by weak or

dead batteries. See the Trouble Shooting section near the end of

the manual for details.

1. Remove the battery cap from the bottom of the Head Unit using

a coin.

2. Install a new battery as shown with the positive (+) side facing out. Do not touch or bend

any of the battery contacts during installation.

3. Screw the battery cap firmly into place and make sure that the O-ring seal does not get pinched or distorted.

Caution: To avoid damage to the battery cap, do not over tighten.

HEAD UNIT

The WL Wireless Speed Transmitter uses an A23, 12-Volt battery. Remove the battery compartment using a coin and

install the battery in it with positive (+) side in, then replace the battery compartment.

Battery Run Time (1 hour training / day): Approx.10 months

WL WIRELESS SPEED TRANSMITTER (

RT288/288L)

A23, 12V

Attach the Wired Speed Sensor with the Zip-Tie supplied and tighten the Bladed Spoke Magnet to the bicycle. Mounting

the sensor as high up as on the fork leg. (Fig. A) Adjust the sensor and magnet spacing with the Spacer. Remove the

Spacer after snugging the Zip-Tie down to hold the sensor in its final position.

WL WIRELESS SPEED TRANSMITTER & MAGNET (

RT288/288L)

Tie the WL Wireless Speed Transmitter with Bracket Rubber Pad loosely by the Zip-Ties supplied to either in the front of

the left fork leg (see Fig.1 A) or at the back of the right fork leg (see Fig.1 B). For best signal reception, make sure the

distance between the Transmitter and the Head Unit is within 70 cm. At the same time, the Transmitter should be

2 ~ 4 cm (or more) away from the brake, to avoid blocking transmission signals by the brake. Adjust the transmitter

and magnet spacing with the Spacer. Slide and rotate the transmitter until the alignment mark just touches the spacer tip

on the magnet. Remove the Spacer after snugging the Zip-Tie down to hold the transmitter in its final position.

Within 70 cmWithin 70 cmWithin 70 cm

2~4 cm2~4 cm

2~4 cm

Fig.1 B

Fig.1 A

1

Rating

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