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MAIN UNIT SETUP

All 

RT

 series computers are programmed to enter the Setup mode after battery installation. In Set-Up, 

Button #1 is used to select or set a value and to advance to the next digit or screen mode. Button #2 is 
used to switch between settings and to increase values.

Press Button #2 to switch between flashing "12" and "24" hour formats. Press Button #1 to select desired 
format and advance to time setting.

SET 12/24 CLOCK

To set the time in CLK mode: Press button #2 to advance hour digits to correct hour (hold button for rapid 
advance). Press Button #1 to select and advance to minutes setting. Press Button #2 to advance minute 
digits and press Button #1 to select. 

(To change the CLK format, time or service time interval, press 

and hold Buttons #1 and #2 simultaneously for 2 seconds in the SPD/CLK screen mode until "12/24" 
hour format digits flash).

SET TIME

Press Button #2 to switch between "M/hr" and "KM/hr" and Button #1 to select desired units and 
advance.

 (To change units in SPD/ODO screen mode, press and hold Buttons #1 and #2 

simultaneously for 2 seconds until "M/hr" begins to flash).

SET SPEED/DISTANCE SCALE

Press Button #2 to advance hour digits to desired total hours and press Button #1 to select and advance 
(Maximum hour setting = 1999 hours).

SET SERVICE TIMER

Default wheel circumference setting is 2074mm. Choose correct wheel circumference figure from Wheel 
Reference Chart. 

Press Button #2 to advance digits as needed and Button #1 to select and advance. 

(Range: 0050-2999mm). 

SET WHEEL SIZE

Summary of Contents for RT33

Page 1: ...ur local bicycle retailer for clarification The head unit is water resistant and sealed to withstand wet weather conditions However do not deliberately place it in water Avoid leaving the head unit exposed to extremely hot weather conditions Vetta encourages you to ride safely Wear a helmet every time you ride use front and rear lights at night and always keep your eyes on the road ahead of you WA...

Page 2: ...A23 12V Wired Cadence Sensor RT77 Cadence Magnet RT77 WL Wireless Speed Transmitter RT88 Spoke Magnet Wire Securing Tape Wired Speed Sensor Mounting Bracket Pad Riser Handle Bar Bracket You may choose 9 or 10 according to the style of your bicycle handlebar Zip Ties Wireless Mount RT88 Wired Mount Spacer Transmitter Mounting Pad 3 CR2032 3 V O L T LITHIUM C E L L 1 3 4 8 1 5 7 1 1 5 2 1 2 9 1 0 6 ...

Page 3: ...ress Button 1 to select To change the CLK format time or service time interval press and hold Buttons 1 and 2 simultaneously for 2 seconds in the SPD CLK screen mode until 12 24 hour format digits flash SET TIME Press Button 2 to switch between M hr and KM hr and Button 1 to select desired units and advance To change units in SPD ODO screen mode press and hold Buttons 1 and 2 simultaneously for 2 ...

Page 4: ...9999 SET ODOMETER Mark the tire and a spot on the floor Roll the wheel forward one complete revolution until the tire mark touches the floor again and mark that spot Measure the distance between the marks on the floor in millimeters and enter the result into the computer 1 inch 25 4mm If your wheel size is not on the chart or if you want a more precise calibration wheel circumference may be calcul...

Page 5: ...o zero manually by pressing and holding Buttons 1 and 2 simultaneously for two seconds in the SPD DST screen mode MAX RT 55 77 88 Service Timer Blinking wrench icon alerts rider when scheduled maintenance is required for suspension shocks chains or other components Elapsed riding time and current Service Timer setting can be viewed on upper and lower displays in Setup mode To view or change Servic...

Page 6: ...ons 1 and 2 simultaneously for two seconds in the SPD DST screen mode MAX CAD RT 77 ALL CLEAR RESET RT 33 55 77 88 All Clear Reset Remove battery and reinstall When you remove the battery all data and all time and odometer settings will be cleared When battery is reinstalled computer will automatically enter the Setup program INSTALLATION PROCEDURES Wired Speed Sensor Wired Speed Sensor Fork Leg S...

Page 7: ...Spoke Magnet WIRED CADENCE SENSOR MAGNET RT 77 RT77 only Attach the wired cadence sensor and cadence magnet with the zip ties supplied to the bicycle 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 See Figures above Cadence Magnet Wired Cadence Sensor Cadence Magnet Cadence Magnet Crank Arm Magnet Sweep...

Page 8: ...eded See fig A Slide main unit into bracket as shown left 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 Wired Mount Cadence RT 77 Locking Tab Locking Tab UNLOCK UNLOCK OUT IN Head Unit Once installation is complete the computer should be tested to make sure it is working properly If there is no speed...

Page 9: ...re limited to the three years duration of the above express warranty Acumen Inc will not be held liable for any incidental or consequential damages If you ever experience a problem with the function of your Vetta RT cycle computer please contact or visit your local Authorized Acumen Inc Dealer for assistance Should you experience a problem with your Vetta RT cycle computer that cannot be solved by...

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