CONTEC C-9WN Wireless Bike Computer Instruction Manual

1. Introduction

Thank you for choosing the CONTEC C-9WN Wireless Bike Computer. This device is designed to provide essential cycling data, enhancing your riding experience. Please read this manual thoroughly before installation and operation to ensure correct usage and optimal performance.

Image 1: CONTEC C-9WN Wireless Bike Computer. This image displays the front view of the CONTEC C-9WN bike computer, showing its digital display with speed and odometer readings, along with the CONTEC 9WN branding and a single control button at the bottom.

2. Safety Information

• Always prioritize road safety. Do not attempt to operate or adjust the computer while cycling in traffic.
• Ensure all components are securely mounted to prevent detachment during rides.
• Keep batteries out of reach of children. Dispose of batteries responsibly according to local regulations.
• Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.

3. Package Contents

Please verify that all the following items are included in your package:

• CONTEC C-9WN Bike Computer Unit
• Wireless Speed Sensor
• Wheel Magnet
• Handlebar/Stem Mount
• Mounting Ties/Bands
• Batteries (typically CR2032 for computer and sensor)
• Instruction Manual (this document)

4. Setup and Installation

4.1. Battery Installation

1. Computer Unit: Open the battery cover on the back of the computer unit. Insert the CR2032 battery with the positive (+) side facing up. Close the cover securely.
2. Speed Sensor: Open the battery compartment on the wireless speed sensor. Insert the CR2032 battery with the positive (+) side facing up. Close the compartment firmly to ensure water resistance.

4.2. Mounting the Computer Unit

• Attach the handlebar/stem mount to your desired location using the provided ties or bands. Ensure it is secure and does not obstruct your view or controls.
• Slide the CONTEC C-9WN computer unit onto the mount until it clicks into place.

4.3. Installing the Speed Sensor and Magnet

1. Speed Sensor: Mount the wireless speed sensor on the front fork, facing the wheel spokes. Use the provided ties to secure it firmly.
2. Wheel Magnet: Attach the magnet to a spoke on the front wheel. Position it so that it aligns with the sensor when the wheel rotates.
3. Alignment: Ensure the distance between the sensor and the magnet is approximately 3-5 mm (maximum 5 mm) when they pass each other. Adjust their positions as needed for optimal signal detection.

Image 2: CONTEC C-9WN Display in operation. This image shows a close-up of the CONTEC C-9WN bike computer's display, indicating a current speed of 35.1 km/h and an odometer reading of 734.6 km. The display also shows 'SCAN' and 'ODO' indicators.

5. Initial Configuration

After battery installation, the computer will power on. You may need to press the main button to activate it. Follow these steps for initial setup:

5.1. Wheel Circumference Setting

• The computer requires your wheel's circumference for accurate speed and distance calculations.
• Refer to your bicycle tire's sidewall for the ETRTO size (e.g., 23-622 for 700x23C) or measure the wheel circumference manually.
• To measure: Mark a spot on your tire and the ground. Roll the wheel one full rotation and mark the ground again. Measure the distance between the two marks in millimeters.
• Enter this value into the computer using the main button to cycle through digits and confirm.

5.2. Unit Setting (km/h or mph)

• Select your preferred unit of speed and distance (kilometers per hour or miles per hour).
• Use the main button to toggle between options and confirm your selection.

5.3. Time Setting (12/24 Hour)

• Set the current time and choose between 12-hour or 24-hour display format.
• Adjust the hours and minutes using the main button.

6. Operating the Bike Computer

The CONTEC C-9WN features 9 functions, accessible via its single control button. Pressing the button cycles through the available display modes.

6.1. Available Functions

• Current Speed: Displays your real-time cycling speed.
• Average Speed: Shows the average speed of your current ride.
• Speed Deviation: Indicates if your current speed is above or below your average speed.
• Maximum Speed: Records the highest speed achieved during your current ride.
• Driving Time: Tracks the duration of your current ride.
• Mileage (Trip Distance): Measures the distance covered in your current ride.
• Kilometer Counter (Odometer): Displays the total accumulated distance across all rides.
• Whole Run Time (Total Time): Shows the total accumulated riding time across all rides.
• 12/24 Hours Display: Current time display.

6.2. Button Usage

• Short Press: Cycles through the various display functions (e.g., Current Speed, Average Speed, Trip Distance, Odometer).
• Long Press: Typically used to reset trip-specific data (e.g., Trip Distance, Driving Time, Average Speed, Max Speed) or to enter/exit settings mode. Refer to the on-screen prompts for specific actions.

7. Maintenance

7.1. Battery Replacement

When the display becomes dim or erratic, it is time to replace the batteries. Both the computer unit and the sensor use CR2032 batteries.

• Follow the instructions in Section 4.1 for battery installation.
• Ensure the battery covers are securely closed to maintain water resistance.

7.2. Cleaning

• Wipe the computer and sensor with a soft, damp cloth.
• Do not use abrasive cleaners or solvents, as these can damage the display or casing.
• Avoid submerging the device in water.

7.3. Storage

If storing the bike computer for an extended period, it is recommended to remove the batteries from both the computer unit and the sensor to prevent leakage and damage.

8. Troubleshooting

• No Speed Display / Erratic Readings:
  • Check battery levels in both the computer and sensor. Replace if necessary.
  • Verify the alignment and distance (3-5 mm) between the speed sensor and the wheel magnet.
  • Ensure the sensor and computer are within effective wireless range (typically within 60-70 cm).
• Incorrect Distance/Speed:
  • Re-check the wheel circumference setting in the computer's configuration.
• Display is Dim or Blank:
  • Replace the computer unit battery.
  • Ensure the device is not exposed to extreme cold, which can affect LCD performance.
• Computer Not Responding:
  • Remove and reinsert the computer battery to perform a soft reset. Note that this may clear some settings.

9. Specifications

10. Warranty and Support

CONTEC products are manufactured to high-quality standards. For warranty information, please refer to the terms and conditions provided at the point of purchase or contact your local CONTEC dealer or customer support. Keep your proof of purchase for any warranty claims.

For further assistance or technical support, please visit the official CONTEC website or contact their customer service department.