: Adjust the sensor and magnet so the passing clearance sits strictly between 1 mm and 3 mm . If the gap is too wide, the computer will fail to register speeds. Initial Calibration: Setting Units and Wheel Size
: Fasten the magnetic wheel sensor to the inside of your front fork.
: Press the MODE button to toggle between Km/H and Mile/H .
Use a 3V CR2032 battery, press and hold both buttons for 3 seconds to start , and measure your wheel roll for the most accurate speed readings. echo j7 cycle computer manual
Cycles through the different display metrics.
: The unit performs safely during rain. However, you must avoid completely submerging it under water. Never leave it sitting under harsh, direct afternoon sunlight while parked, as overheating will temporarily black out the LCD panel. Quick Troubleshooting Probable Root Cause Actionable Solution No Speed Reading ( ) Incorrect sensor clearance or misaligned magnet Readjust the magnet to pass within 1–3 mm of the sensor. Inaccurate Distance Calculations Incorrect wheel circumference code input Measure tire roll-out and reprogram the correct value ( Faded or Sluggish Screen Dead battery or extreme freezing temperatures Replace with a fresh LR44 battery cell. Move bike inside. Scrambled LCD Symbols Microprocessor calculation error
You must perform a full system initialization before using the device for the first time or after changing batteries. This prevents data calculation errors. Locate the and MODE buttons on the unit. : Adjust the sensor and magnet so the
The LCD screen will flash all components during an automatic self-test. Press the button to terminate the self-test.
Installation & Setup (concise steps)
Proper physical installation is critical. Misaligned components cause inaccurate readings or complete data failure. 1. Mounting the Bracket : Press the MODE button to toggle between Km/H and Mile/H
Once installed and programmed, the suggests this simple routine:
Press the button to toggle between KM/h (Kilometers per hour) and M/h (Miles per hour). Press the Set button on the back to confirm your choice. 2. Input Wheel Circumference (Caliper Value)
Proper installation is crucial for accurate data. Follow these steps to install your J7 computer Go to product viewer dialog for this item. Tools Needed Scissors (to trim zip ties) Measuring tape (for wheel circumference) Step 1: Install the Bracket
Proper setup ensures accurate data reporting by aligning the physical components and internal settings. Wheel Calibration (Odometer) display mode. button to access calibration settings.