Activate in App: Open the Huawei Health app on your phone, go to Heart > Pulse wave arrhythmia analysis, and complete the on-screen activation steps.Proper Positioning: Ensure the smart band is worn snugly and properly on your wrist. Place your forearm flat on a stable surface (like a table) and stay completely relaxed.Take a Measurement: Navigate to the app list on your watch, select Pulse wave arrhythmia analysis, and tap Measure. Remain completely still until the test completes.