Epson Runsense SF-810 User Manual - Page 22
Making precise measurements, Calibrating the pulse and stride sensor
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Setting up your SF-810 Use either of the following methods to enter Indoor mode. O Press C or D to highlight Indoor during GPS positioning, then press A. O If GPS positioning fails, press C or D to highlight Indoor on the screen displayed, then press A. Note: The basic configuration of the GPS system is 24 satellites orbiting the Earth at an altitude of about 12,500 miles (20,000 km), with at least four satellites travelling in six different orbits. The GPS receiver acquires data from four satellites and calculates the latitude, longitude, altitude, and time. Measuring can start once positioning has been performed and this information has been received. Your product receives more detailed GPS navigation data after 15 minutes of GPS positioning, which allows you to make more precise measurements. Errors may still occur in distance measurements due to atmospheric conditions and your specific surroundings. Making precise measurements When you use the product for the first time or when the product has not been used for several months, you need to allow the product to completely synchronize with the GPS satellites. Switch to the Measurement screen, then wait outside for at least 15 minutes with no obstructions overhead. Your product will track your movements with greater accuracy after this extended calibration. You will not need to repeat this process again unless you do not use the product for a few months. Calibrating the pulse and stride sensor About the pulse and stride sensor This product has a built-in pulse sensor and a stride sensor. The pulse sensor detects your pulse (heart rate) directly on your wrist. The stride sensor calculates distance and laps with high precision, and measures your pitch and stride even when the GPS signal is lost. 21