Operation Manual

Specifying a GPS (GPS Positioning)
Measuring function for the device
This device receives a signal from the GPS, and measures distance and pace. To make sure measurements are
performed accurately, try to use the device under the following conditions which allow for easy reception of GPS
signals.
❏ Outside with no obstructions overhead
❏ Wear the device with the screen facing up
Locations where you cannot receive signals
Inside rooms or buildings, or
underground
In tunnels Under water
Locations that are difficult to receive signals
Locations with electronic
interference, such as
constructions sites and heavy
traffic
Near high-voltage wires or
television towers, overhead
electric wires for trains, and roads
with skyscrapers
On water
SF-810 User Manual
Preparing and Basic Operations
30