1. Inleiding
Thank you for choosing the Prophete Sigma Sport BC 400 Bicycle Computer. This device is designed to provide essential cycling data, enhancing your riding experience. It features 5 key functions, including speed tracking, distance measurement, and a timer. This manual will guide you through the installation, operation, and maintenance of your new bicycle computer.

Image 1.1: The Prophete Sigma Sport BC 400 Bicycle Computer in its retail packaging. The packaging highlights 5 functions, icons, total kilometers, tool-free installation, and quick mounting.
2. Inhoud van het pakket
Controleer of alle artikelen in het pakket aanwezig zijn:
- Prophete Sigma Sport BC 400 Bicycle Computer Unit
- Stuurbevestiging
- Snelheidssensor
- Spaakmagneet
- Kabelbinders voor montage
- CR2032-batterij (voorgeïnstalleerd of apart verkrijgbaar)
- Gebruiksaanwijzing (dit document)
3. Installatie en installatie
3.1. Mounting the Speed Sensor and Magnet
- Attach the speed sensor to the front fork of your bicycle using the provided cable ties. Ensure it is securely fastened and positioned to align with the spoke magnet.
- Mount the magnet onto a spoke of the front wheel. Position the magnet so that it passes the sensor with a gap of approximately 1-3 mm.
- Rotate the wheel to verify that the magnet passes the sensor cleanly and without contact.

Afbeelding 3.1: Een close-up view of the Prophete Sigma Sport BC 400 bicycle computer unit. This image shows the display and the main button, indicating its compact design.
3.2. Mounting the Bicycle Computer
- Attach the handlebar mount to your bicycle's handlebar or stem using the provided cable ties. Ensure it is positioned for easy viewen toegang.
- Slide the BC 400 computer unit onto the handlebar mount until it clicks securely into place. The mounting is designed to be tool-free.
3.3. Oorspronkelijke instellingen
After installation, you will need to configure the computer for accurate readings.
- Wielmaat: This is crucial for accurate speed and distance measurements. Refer to your bicycle tire's sidewall for the wheel diameter (e.g., 700c, 26 inches) and consult the table below for the corresponding circumference value in millimeters.
- Eenheden: Select between kilometers (km) and miles (mi) for distance and speed measurements. This setting is usually found within the initial setup menu.
- Tijd: Set the current time (e.g., 24-hour format).
| Wielmaat | Omtrek (mm) |
|---|---|
| 16 inch | 1272 |
| 20 inch | 1590 |
| 26 inch | 2070 |
| 27 inch | 2155 |
| 27.5 inch | 2180 |
| 28 inch (700c) | 2240 |
| 29 inch | 2300 |
To enter the wheel size, press and hold the main button until the setting mode is activated. Use the button to adjust the value and confirm.
4. Operating the Bicycle Computer
The BC 400 features a simple interface, typically controlled by a single button for cycling through functions and settings.
4.1. Weergavefuncties
The computer displays 5 key functions:
- Huidige snelheid: Geeft uw realtime fietssnelheid weer.
- Gemiddelde snelheid: Toont de gemiddelde snelheid van uw huidige rit.
- Maximale snelheid: Registreert de hoogste snelheid die tijdens uw huidige rit is bereikt.
- Reisafstand: Measures the distance covered during your current ride.
- Totale afstand (kilometerteller): Accumulates the total distance covered since the computer was first set up. This value is generally not shown during a ride.
- Ride Time (Timer): A separate timer that can be manually started and stopped for tracking ride duration.
4.2. Knopfuncties
The main button on the computer unit serves multiple purposes:
- Kort indrukken: Cycles through the various display functions (e.g., Current Speed, Average Speed, Trip Distance).
- Lang ingedrukt houden: Activates the setting mode or resets trip-specific data (e.g., trip distance, average speed, maximum speed, ride time). Refer to the specific icon on the display for confirmation before resetting.
4.3. Ritgegevens resetten
To reset trip-specific data (trip distance, average speed, maximum speed, ride time), typically a long press of the main button while on a trip-related display will initiate the reset. The total distance (odometer) cannot be reset by the user.
5. Onderhoud
5.1. Batterij vervangen
The BC 400 uses a CR2032 coin cell battery. When the display becomes dim or functions become erratic, it's time to replace the battery.
- Carefully remove the computer unit from its handlebar mount.
- Zoek het batterijklepje aan de achterkant van het apparaat.
- Gebruik een klein muntje of een schroevendraaier om het batterijklepje voorzichtig open te draaien.
- Remove the old CR2032 battery and insert a new one, ensuring the positive (+) side faces upwards.
- Plaats het batterijklepje terug en draai het vast.
- After battery replacement, you may need to re-enter some initial settings like wheel size and time.
5.2. Schoonmaken
Reinig de computerunit en de sensor regelmatig met een zachte, droge doek.amp doek. Gebruik geen schuurmiddelen of oplosmiddelen, aangezien deze het scherm of de behuizing kunnen beschadigen.asing. The unit is designed to be waterproof, but avoid submerging it.
6. Probleemoplossing
| Probleem | Mogelijke oorzaak | Oplossing |
|---|---|---|
| Geen weergave of zwak display | Lege of bijna lege batterij | Vervang de CR2032-batterij. |
| No speed reading / Incorrect speed | Sensor/magnet misalignment, loose sensor, incorrect wheel size setting | Check sensor and magnet alignment (1-3mm gap). Ensure sensor is securely mounted. Verify correct wheel circumference setting. |
| Computer not responding to button presses | Battery issue, internal error | Vervang de batterij. Als het probleem aanhoudt, neem dan contact op met de klantenservice. |
| Water binnendringen | Improperly sealed battery cover, extreme conditions | Ensure battery cover is tightly sealed. While waterproof, avoid prolonged submersion. |
7. Specificaties
- Merk: Prophete
- Modelnummer: 103 (BC 400)
- Functies: 5 (Current Speed, Average Speed, Max Speed, Trip Distance, Total Distance, Ride Time)
- Kleur: Zwart
- Sensortype: Snelheidssensor
- Montagetype: Handlebar Mount (Tool-free)
- Interface: Knoppen
- Batterij: CR2032 (inbegrepen)
- Afmetingen (L x B x H): 6x4x2cm
- Gewicht: 200 gram
- Waterbestendigheid: Yes (general splash/rain resistance)
8. Garantie en ondersteuning
For warranty information and customer support, please refer to the documentation provided with your purchase or visit the official Prophete webwebsite. Bewaar uw aankoopbewijs voor eventuele garantieclaims.