Acumen RT233 User Manual
RT233
1.0
WARNINGS & CAUTIONS
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.
FUNCTIONS / FEATURES
2
Auto Awake & Start-up
Current Speed
Cumulative Odometer
Trip Distance
12/24 Hour Clock
5. Battery Compartment
6. Battery Cap
2
8
5
4
3
6
4
9
Standard Harness
Replaceable Front Cover
2 Screen Display Windows
EZ Tire Set
Service Timer
ILLUSTRATIONS
HEAD UNIT
3
1
1
1. Button
2. Button
2
3. Main Display
4. Contact Pins
COMPONENTS
1
5
6
7
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
WIRED SPEED SENSOR & MAGNET
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.
Fig. A
Spoke
Spacer
Bladed
Spoke Magnet
Bladed Spoke Magnet
Spoke
Wired Speed Sensor
Spacer Tip
Alignment Mark
Zip-Tie
Fork Leg
Spoke Magnet
Bladed
Magnet
Sweep Path
Bladed
Spoke Magnet
Wired Speed Sensor
MOUNTING BRACKET & HEAD UNIT
Attach Mounting Bracket & Bracket Rubber Pad to
the hand lebar on the “S ensor side” usin g 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 He ad Unit int o the Wire d Mounting
Bracket as s hown until it cli cks into po sition.
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
Head Unit
Wired Mounting Bracket
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.
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.
SETUP & PROGRAMMING
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:
1
1 2
Computer CANNOT exit during the Setup Mode until all the Basic Settings are finished.
2
12/24 CLOCK
2
Press to toggle between flashing 12 and 24 hour formats.
1
to select your desired format (without PM icon implies
2
Press
AM in 12 hour format) and advance to Time setting.
BUTTON FUNCTIONS
Press momentarily
2
Button : Lower Screen Modes
Press & hold for 2 seconds
2
1
Button & when the lowest screen is in the CLK Mode: NOM Setup
2
1
Button & when the lowest screen is in the DST Mode: Reset Ride Data
1
2
BATTERY INSTALLATION
HEAD UNIT
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.
INSTALLATION
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.
TIME
2
Press to advance hour digits to correct hour (hold button for rapid advance). Press to select and advance to minute
2
setting. Press to advance minute digits to correct minute. Press to select and advance to the next Setup Mode.
2 1 2
1
1
SPEED/ DISTANCE UNIT
2
Press to toggle between flashing M/hr and KM/hr. Press to select
2
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
installation, new battery replacement or All Clear Total Reset.
1
st
time battery
SERVICE TIMER
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.
2
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 )
2
1
1
1
1 2 1
CLK
2
1 2 1
2
1 2 1
OR OR
2 2 2
When the Ride Time (the elapsed time for
Service Timer) or the elapsed distanc e
begins to flash, press & hold to reset to
zero;
1
OR press to re serve the digi ts, and
advance to the next Setup Mode.
Important:
In the Initi al S etup, the elapsed ti me
[distance] for Service Timer doesn’t exist.
2
WHEEL/ TIRE SIZE
2
Press to toggle between flashing circ (circumference) and tire (tire type). Press to select the desired and advance
the settings.
If pre-set to circ (see Table of Tire Size Vs Circ), 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 four digits are selected.
If pre-set to tire, press to scroll the flashing 700c, 650c, 27in, 26in, 24in, 20in or 16in. Press to select and advance
to next setting to complete the Tire Size. Again, press to scroll and press to finalize the Tire Size and advance to
the next Setup Mode.
2
1
2
1 2 1
2
2
2 1
1
1
1
1
Time is displayed in user-selected 12 or 24 hour formats.
OTHER FEATURES
SLEEP MODE
Computer enters Sleep Mode after 5 minutes without input from any buttons or wheel, and
displays the clock only. Computer exits Sleep Mode and returns to the screen last displayed
when any button is pressed or the wheel turns.
SERVICE TIMER( )
Blinking “ ” alerts rider the Service Time is reached.
TROUBLE SHOOTING
Current speed-reading is erratic or does not appear.
Check the alignment of the bladed spoke magnet and sensor, and the distance between the two components.
Realign the magnet and sensor with the spacer.
OR Inspect the wiring for any breaks or kinks. Replace Mounting Bracket and sensor as needed.
Incorrect data appears on screen during operation.
Accuracy of the Setup data may be a problem (wheel size setting, etc.).
Data display is extremely slow.
Computer LCD screen operates the best under the following temperature range:
Operating range is: 0 ˚C to 50 ˚C or 32 ˚F to 122 ˚F.
Screen is dark and display erratic characters.
Do not leave the computer in direct sunlight for extended periods of time. Move the computer into the shade until the
screen recovers.
Noted: Data will not be affected.
Screen reading is weak or fading.
Symptom of a weak battery. Replace the battery.
Screen readings are erratic and read too high or too low.
Symptom of a weak battery. Replace the battery.
Screen “frozen”, no response to buttons.
Symptom of a weak battery. Replace the battery.
No display whatsoever.
Battery is completely dead, or not installed. Replace or install the battery.
TIRE SIZE CIRC
700c x 38mm 2180
700c x 35mm 2168
700c x 32mm 2155
700c x 30mm 2145
700c x 28mm 2136
700c x 25mm 2124
700c x 23mm 2105
TIRE SIZE CIRC
700c x 20mm 2074
700c Tubular 2130
650c x 23mm 1990
650c x 20mm 1945
27” x 1.25” 2161
27” x 1.125” 2155
26” x 2.3” 2135
TIRE SIZE CIRC
26” x 2.25” 2115
26” x 2.1” 2095
26” x 2.0” 2074
26” x 1.9/1.95” 2055
26” x 1.75” 2035
26” x 1.5” 1985
26” x 1.25” 1953
TIRE SIZE CIRC
26” x 1.0” 1913
24” x 1.9/1.95” 1916
20” x 1.25” 1618
16” x 2.0” 1253
16” x 1.95” 1257
16” x 1.5” 1206
ODOMETER
2
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 five digits are selected. Press to advance the next Setup Mode. (Maximum setting: 99999)
2 1 1
1
1
FUNCTIONS
2
Press to scroll the lower screen Modes.
To enter the NOM Setup Mode, press & hold & simultaneously for 2 seconds when the lowest screen is in the CLK Mode,
To reset Ride Data to zero, press & hold and simultaneously for 2 seconds when the lowest screen is in the DST Mode.
1 2
1 2
SPD
Speed is shown at all times on upper display. It is accurate to 0.1 M/hr or KM/hr and the
maximum reading is 139.9 M/hr or 199.9 KM/hr.
DST
DST displays trip d istance of
curre nt ride to a m aximum o f
999.9 mil es o r ki lometers . It
is acc urate to 0.1 Mile or
KM.
Note: When the Trip Distanc e
exc eeds 99 9.9 mil es
[ki lomet ers], symb ol
appears i ndicating that f urther
measurement is impossible.
“E”
WARRANTY POLICY
ACUMEN INC. WARRANTS ALL VETTA (The Company) PRODUCTS AGAINST MANUFACTURER DEFECTS FOR A
PERIOD OF 3 YEARS. Su bject to the follow ing limitations, te rms and conditions , components will b e free of
manufacturing defects in materials and workmanship. The 3 year limited warranty is conditioned upon the components
being used and operated in normal riding conditions. This warranty does not cover normal wear and tear (i.e. battery
replacement, broken wire), rider abuse, acts of God, improper installation or product alteration.
This warranty is void if the components were not purchased (new) from or through an authorized VETTA retailer
or dealer. Examples of unauthorized dealers are online auction sites or online retailers.
ACUMEN INC. at its sole discretion will repair or replace items at its own cost. Users are responsible for all freight and
shipping charges, when returning items for warranty service.
ACUMEN INC. will pay the freight when returning serviced items, via USPS or UPS to consumers or dealers, once the
item(s) has been repaired or replaced.
REQUIREMENTS FOR WARRANTY SERVICING
1. Prior to shipping an item back, you must first obtain a Return Authorization Number (s) (RA#). Each item being
returned must have an individual RA#.
2. To obtain an RA #, you must either contact the retailer where the product was originally purchased from, or contact
directly at customer service @ vetta.com.
VETTA
3. For trouble shooting purposes, we request that the complete unit with packaging be returned to ACUMEN INC
unless otherwise stated by VETTA representative.
.
ITEMS TO BE INCLUDED IN RETURNS
1. The defective product(s)
2. A letter clearly stating the problem(s) with the returned item(s).
3. Copy of the original sales receipt showing proof of purchase date.
4. The Company is not responsible for loss or additional damages while in transit to
5. Clearly mark the RA# on the outside of the return packaging. All items without an RA # will be refused and returned
to the return address on the package.
The Company shall not be held responsible for replacing items with new items for greater than the amount of the original
item purchase price. This limited warranty does provide the original owner with certain legal rights and recourse. The
original owner may possess other rights or recourse, depending on the state or country. Please check the web to help
answer any question and service manual.
ACUMEN INC.
ACUMEN INC CUSTOMER SERVICE CENTERS
Acumen Inc.
101A Executive Dr., Suite 100, Sterling, VA 20166, USA.
Acumen Europe BV
Splijtbakweg 117, 1333 HJ, Almere, The Netherlands.
Email: customerservice@vetta.com
Website: www.vetta.com
ODO
The odometer displays distance to 99999 Miles or Kilometers. It is a ccurate
to 1. 0 Mile o r KM.
2
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