Acumen RT233 Dépliant

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.

 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

 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.

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

1.  Button

2.  Button

3.  Main Display

4.  Contact Pins

5.  Battery Compartment

6.  Battery Cap

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

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     : Lower Screen Modes

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 

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

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

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 

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

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.

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.

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.

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.

 Computer CANNOT exit during the Setup Mode until all the Basic Settings are finished.

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.

 Make sure the magnet locking screw and all Zip-Ties are properly tightened.

Press     to toggle between flashing 12 and 24 hour formats. 

Press 

  to select your desired format (without PM icon implies 

AM in 12 hour format) and advance to Time setting.

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.

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        

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 )

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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