Sunding SD-577C1 Wireless Bicycle Computer User Manual

1. Introduction

This manual provides detailed instructions for the installation, setup, and operation of your Sunding SD-577C1 Wireless Bicycle Computer. This device is designed to track various cycling metrics, offering features such as speed, distance, cadence, and temperature measurement. Please read this manual thoroughly before use to ensure proper functionality and longevity of your device.

Figure 1: Sunding SD-577C1 Wireless Bicycle Computer Display

2. Package Contents

Verify that all items listed below are included in your package:

• Sunding Wireless Cycling Computer (SD-577C1) x 1
• Remote Control and Base x 1
• Speed Cadence Sensor x 1 (often referred to as Wireless Sensor)
• Wheel Magnet x 1 (for speed measurement)
• Crank Magnet x 1 (for cadence measurement)
• Ties x 6
• Instruction Manual x 1
• CR2032 Batteries x 3 (for computer, sensor, and remote)

Figure 2: Included Components

3. Key Features and Functions

The Sunding SD-577C1 offers a comprehensive set of features to enhance your cycling experience:

3.1 Core Functions (27 Total)

• Speed: Current riding speed.
• Total Odometer (ODO): Total accumulated distance.
• Day Distance (DST): Distance covered during the current ride.
• Max Speed (MAX): Highest speed achieved.
• Average Speed (AVG): Average speed of the current ride.
• Ride Time (RTM): Duration of the current ride.
• Total Time (TTM): Total accumulated riding time.
• Temperature (TEMP): Current ambient temperature.
• Max Temperature (MAX TEMP): Highest recorded temperature.
• Min Temperature (MIN TEMP): Lowest recorded temperature.
• Stopwatch (STW): For timing specific intervals.
• Trip Distance Down (TRIP DDN): Countdown for a preset trip distance.
• Time Down (TIME TDN): Countdown for a preset time duration.
• Gear Ratio (GR): Displays current gear ratio.
• Max Cadence (MAX CAD): Highest recorded pedaling cadence.
• Average Cadence (AVG CAD): Average pedaling cadence.
• Calorie (CAL): Estimated calories burned.
• Fat Burn (FAT): Estimated fat burned.
• Altitude (ALT): Current altitude.
• Hi-Altitude (HI-ALT): Highest recorded altitude.
• Climb Height (CLIMB HT): Total ascent.
• Atmospheric Pressure (PRES): Current atmospheric pressure.
• Min Pressure (MIN PRES): Lowest recorded atmospheric pressure.
• Clock (CLK): Current time (12/24H format).
• Date (DATE): Current date.

3.2 Auxiliary Modes and Special Features

• Panoramic Display Mode: Allows simultaneous display of multiple functions.
• Menu Cycle Mode: Cycles through display menus.
• Low Battery Indicator: Alerts when battery is low.
• Remote Control: Allows function switching without removing hands from handlebars.
• Speed Comparison: Indicates if current speed is above or below average.
• Menu Hidden Mode: Option to hide certain menu items.
• Wireless Auto Wake-Up: Automatically activates from dormant state by shaking the handlebar.
• Smart Backlight: Automatically activates in low light conditions or manually for 5 seconds.
• Maintenance Alert: Reminds user for bicycle maintenance based on preset distance.
• Waterproof Design: The computer is designed to be waterproof up to 1 meter depth.

Figure 3: Device Dimensions and Feature Icons

4. Setup and Installation

4.1 Battery Installation

The computer, wireless sensor, and remote control each require a CR2032 battery. Open the battery compartments using a coin or small screwdriver, insert the batteries with the positive (+) side facing up, and securely close the covers.

4.2 Computer Mounting

1. Fasten the computer mount onto your bicycle's handlebar using the provided ties. Ensure it is securely positioned and does not obstruct steering.
2. Slide the bicycle computer onto the mount until it clicks into place.

4.3 Speed Sensor and Wheel Magnet Installation

Proper placement of the speed sensor (part of the wireless sensor) and wheel magnet is crucial for accurate speed and distance readings.

1. Tie the wireless sensor onto the front fork of your bicycle.
2. Attach the wheel magnet to a spoke on the front wheel.
3. Adjust the magnet and sensor so that the magnet passes the sensor's marked area (usually indicated by an arrow or line) with a gap of less than 1.5 mm. The wireless induction distance should be less than 600mm between the sensor and the computer.
4. Ensure the magnet's flat face is parallel to the sensor.

4.4 Cadence Sensor and Crank Magnet Installation (Optional)

If your package includes a separate crank magnet for cadence measurement, attach the crank magnet to the crank arm. Position the cadence sensing part of the speed cadence sensor (wireless sensor) on the chainstay. Ensure the crank magnet passes the designated area on the sensor with a gap of less than 1.5 mm. Refer to the specific instructions in the included manual for detailed cadence sensor placement.

Figure 4: Wireless Speed Sensor and Wheel Magnet Installation Guide

Figure 5: Remote Control, Smart Backlight, Wireless Wake-up, and Battery Compartment

5. Parameter Settings

To access settings, hold the SET button for 3 seconds in ODO (Odometer) or TTM (Total Time) mode. Press MODE to select options and SET to confirm.

• Multi-Language Setting: Hold SET for 3 seconds in ODO or TTM. Press MODE to select your preferred language.
• KM/M (Unit Setting): Choose between Kilometers (KM) or Miles (M) for distance and speed measurements.
• Wheel Size: Input your wheel circumference in millimeters (mm). Refer to your bicycle tire for this value or measure it accurately. This is critical for accurate speed and distance readings.
• Initial Odometer (ODO): Set an initial odometer reading if desired (e.g., to match previous computer data).
• Initial Time (TTM): Set an initial total time reading.
• Rider's Weight: Input your weight for more accurate calorie and fat burn calculations.
• Maintenance Distance: Set a distance interval for a maintenance reminder alert.
• Clock: Set the current time (12H or 24H format).
• Date: Set the current date.
• Distance Countdown: Set a target distance for the TRIP DDN function.
• Time Countdown: Set a target time for the TIME TDN function.
• Menu Cycle: Configure which functions are included in the main display cycle.
• Chainwheel and Flywheel (Gear Ratio): Set the number of teeth on your chainwheel and flywheel for gear ratio calculations. For example, "3:1" indicates a chainwheel with 3 fluted discs, and "8:1" indicates a chainwheel with 8 fluted discs. The ratio of the first chainwheel is recommended based on speed. Recommended cadence for flat terrain is 90 RPM, and for sloped terrain is 75 RPM.
• Menu Hidden: Hide specific menu items from the main display.
• Panoramic Display: Enable or disable the panoramic display mode.
• Temperature Unit: Select between Celsius (°C) or Fahrenheit (°F).
• Clear Signal Data: Option to clear stored wireless signal data.

Figure 6: Gear Ratio Setting Explanation

6. Operating Instructions

The computer features two main buttons: SET and MODE, located at the bottom of the display. These buttons are used for navigation and setting adjustments.

6.1 Basic Navigation

• Press MODE to cycle through different display functions (e.g., Speed, Distance, Time, Temperature).
• Press SET to view sub-functions or enter setting modes (when prompted).

6.2 Remote Control Usage

The wired remote control allows you to switch between functions without removing your hands from the handlebars, enhancing safety during your ride. Simply press the button on the remote to cycle through the display modes.

6.3 Smart Backlight

The Smart Backlight feature automatically activates under insufficient light conditions. You can also manually activate the backlight by pressing any button for 5 seconds. The backlight will remain on for 5 seconds.

6.4 Wireless Auto Wake-Up

When the computer is in a dormant state, simply shake the handlebar, and the device will automatically wake up and resume operation immediately, ensuring no loss of riding records.

6.5 Panoramic Display Mode

This mode allows you to view up to three different functions concurrently on the screen, eliminating the need to frequently switch menus. Press MODE to customize which data is displayed, and press SET to move to the next display option. The first function is displayed by default, while the second and third are hidden by default.

Figure 7: Panoramic Display Mode

7. Maintenance

• Cleaning: Wipe the computer and sensors with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Water Resistance: The device is waterproof up to 1 meter depth. However, avoid prolonged submersion and ensure battery compartments are sealed properly after battery changes.
• Battery Replacement: Replace CR2032 batteries when the low battery indicator appears. Ensure correct polarity.
• Maintenance Alert: If you have set a maintenance distance, the computer will display an alert when that distance is reached, reminding you to perform bicycle maintenance.
• Storage: When not in use for extended periods, store the computer in a cool, dry place. Consider removing batteries if storing for several months.

8. Troubleshooting

9. Specifications

10. Warranty and Support

For warranty information and technical support, please refer to the contact details provided with your purchase documentation or visit the official Sunding website. Keep your purchase receipt as proof of purchase for any warranty claims.

Manufacturer: Shenzhen Sunding Dragon Electronics Co.,LTD