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WARNINGS & CAUTIONS
•
Vetta cycle computers are sophisticated electronic instruments. Vetta recommends that this product
be installed only by a qualified bicycle retailer. Failure to read these instructions and/or improper
installation of this device may void the warranty. If in doubt about any aspect of the installation
or operation of this product, consult your 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.
HEAD UNIT: FRONT
G
1
HEAD UNIT: REAR
A
B
2
F
B
A
C
A
Upper Display (Speed)
B
Speed Comparator Icon
C
Service Timer Icon
D
Speed/Distance Units
E
D
RPM Indicator
F
Lower Display
G
Function Icons
E
1
Set/Select Button (Left)
2
Mode/Advance Button (Right)
C
A
Contact Points
B
Battery Compartment
C
Battery Cover
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Summary of Contents for Vetta RT55
- Page 1 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.
-
Page 2: Component Illustrations
COMPONENT ILLUSTRATIONS Head Unit Battery (CR2032 - 3V) WL Wireless Speed Transmitter Battery (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) -
Page 3: Main Unit Setup
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. -
Page 4: Primary Functions
TIRE SIZE CIRC TIRE SIZE CIRC TIRE SIZE CIRC 700c x 38mm 2180 650c x 23mm 1990 26" x 1.75" 2035 700c x 35mm 2168 650c x 20mm 1945 26" x 1.5" 1985 27" x 1-1/4" 2161 26" x 1.25" 1953 700c x 32mm 2155... -
Page 5: Special Features
RT 55|77|88 Displays actual, cumulative ride time to 9:59:59. Reset to zero manually by pressing and holding Buttons #1 and #2 simultaneously for two seconds in the SPD/DST screen mode. RT 55|77|88 Average Speed is displayed in the SPD/AVG screen mode and reads to within 0.1 miles or kilometers per hour. -
Page 6: Freeze Frame Memory
FREEZE FRAME MEMORY RT 55|77|88 Rider can freeze Distance, Ride Time, Average Speed and Maximum Speed readings at any time by pressing Button #1 for two seconds while in the SPD/DST or SPD/RT screen modes. Display flashes to indicate it has been frozen. Saved data can be scrolled and reviewed by pressing Button #2. Press Button #1 to return to DST or RT screens. - Page 7 Attach the wired speed sensor with the zip-tie supplied and tighten the spoke magnet 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) WIRED CADENCE SENSOR &...
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Page 8: Installation Tests
If there is no speed reading, check the alignment and spacing between the magnet and sensor/transmitter. Make sure that the head unit is completely locked into position and the handlebar mount is not over tightened. If this check does not solve the problem, talk to your Vetta Retailer or connect to www.vetta.com. - Page 9 WARRANTY RETURN & REPAIR POLICY Acumen Inc, warrants all Vetta products, to the original purchaser, to be free of defects in materials or workmanship for a period of three years from the original date of purchase. Acumen Inc will, at its sole discretion, repair or replace any product deemed defective.
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