Vetta’s RT233 is an upgraded version of RT33 cycle computer. It is recommended that this product to be installed by a
qualified bicycle retailer. Failure to read the instructions and/ or improper installation of this device may void the
warranty. If you have any doubts about the installation or the operations, contact your local bicycle retailer for
clarification.
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.
The Head Unit uses a CR2032 3-Volt Lithium button cell
battery.
Battery Run Time (1 hour training / day): Approx. 12 months
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 making sure the O-ring seal does not get pinched or distorted.
Caution: To avoid damage to the battery cap, do not over tighten.
WARNINGS & CAUTIONS
ILLUSTRATIONS
BATTERY INSTALLATION
INSTALLATION
HEAD UNIT
COMPONENTS
RT233
1. Button
2. Button
3. Main Display
4. Contact Pins
5. Battery Compartment
6. Battery Cap
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2
4
5
6
Standard Harness
Replaceable Front Cover
2 Screen Display Windows
EZ Tire Set
Service Timer
Auto Awake & Start-up
Current Speed
Cumulative Odometer
Trip Distance
12/24 Hour Clock
FUNCTIONS / FEATURES
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4
5
6
7
9
8
2
3
1. Wired Speed Sensor with Mounting Bracket
2. Extra Clear Front Cover
3. Bracket Rubber Pad
4. Bracket Rubber Pad (Riser Handlebar)
5. Bladed Spoke Magnet
6. Spacer
7. Head Unit Battery (CR2032, 3-Volt)
8. Wire Securing Tape
9. Zip-Ties
BUTTON FUNCTIONS
HEAD UNIT
Press momentarily
Button : Lower Screen Modes
Press & hold for 2 seconds
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
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1.0
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2
Attach the Wired Speed Sensor with the Zip-Ties supplied and tighten the Bladed Spoke Magnet to the bicycle. Mounting
the sensor as high up as on the fork leg (see 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.
WIRED SPEED SENSOR & 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
MOUNTING BRACKET & HEAD UNIT
Attach Mounting Bracket & Bracket Rubber Pad to
the handlebar on the “Sensor side” using the
Zip-Ties provide. Adjust its position to your liking
and tighten the Zip-Ties. Note: Be sure to leave
enough slack in the wire to accommodate the
movement of fork and handlebars. (See Fig. A)
Slide the Head Unit into the Wired Mounting
Bracket as shown until it clicks into position.
Remove by pressing in the two locking tabs as
shown.
Secure wire with tape supplied and by winding it
around cables.
Locking Tab Locking Tab
UNLOCK UNLOCK
Wired Mounting Bracket
Head Unit
INSTALLATION TESTS
Once installation is complete, the computer should be tested to make sure it is working properly.
Pick up the front of the bicycle and spin the front wheel. The LCD should display a speed- reading within 2-3 seconds.
SERVICE TIMER
SETUP & PROGRAMMING
12/24 CLOCK
TIME
In Setup, Button is used to select or set a value and to advance to the next digit or Mode. Button is used to switch
between settings and to increase values.
Initial Setup
RT233 is programmed to enter the Initial Setup Mode after new battery replacement.
In the Initial Setup, riders can program the Basic Settings for the computer, the content of settings are same as NOM
Setup for Basic Setting.
NOM Setup
After completed the Initial Setup, riders can change any values or correct any errors by re-entering the NOM Setup.
To enter the NOM Setup Mode press & hold & simultaneously when the lowest screen is in the CLK Mode.
Important: Computer CANNOT exit during the Setup Mode until all the Basic Settings are finished.
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If there is no speed-reading, check the alignment and spacing between the magnet and sensor. Make sure that the Head
Unit is completely locked into position. If these checks do not solve the problem, talk to an Authorized Vetta’s Retailer or
connect to www.vetta.com.
Important: Make sure the magnet locking screw and all Zip-Ties are properly tightened.
Press to toggle between flashing 12 and 24 hour formats.
Press
1
to select your desired format (without PM icon implies
AM in 12 hour format) and advance to Time setting.
2
Press to advance hour digits to correct hour (hold button for rapid advance). Press to select and advance to minute
setting. Press to advance minute digits to correct minute. Press to select and advance to the next Setup Mode.
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1
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1
Service Timer could be programmed with a selected number of ride time (hours or days) or distance as the interval for
servicing the bicycle or any component on it, such as a front or rear shock.
The default settings “0000” means the Service Timer is turned off.
Press to scroll flashing hr (hour), day or dst (distance) as the Service Timer unit. Press to select the desired Service
Timer unit.
When the desired Service Timer unit has been chosen, press to scroll the flashing digit to the desired number. Press
1
to select this number and advance to next digit. Repeat this procedure until all digits are selected. Press to advance
the next Setup Mode. ( Maximum settings: hour / day / distance = 1999 / 999 / 9999 )
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SPEED/ DISTANCE UNIT
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Press to toggle between flashing M/hr and KM/hr. Press to select
and advance to the next Setup Mode.
Note: Speed/Distance Unit cannot be changed if there have been ride
data on screens. If you want to change the Unit, please make sure you
had cleared all ride data before entering the NOM Setup Mode. This
restriction does not apply to the Initial Setup after the 1
st
time battery
installation, new battery replacement or All Clear Total Reset.
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