Getting Pulse Oximeter Readings
You can manually begin a pulse oximeter reading by viewing the pulse oximeter glance. The glance displays
your most recent blood oxygen saturation percentage, a graph of your hourly average readings for the last 24
hours, and a graph of your elevation for the last 24 hours.
NOTE: The first time you view the pulse oximeter glance, the watch must acquire satellite signals to determine
your elevation. You should go outside, and wait while the watch locates satellites.
1 While you are sitting or inactive, press UP or DOWN to view the pulse oximeter glance.
2 Press START to view glance details and begin a pulse oximeter reading.
3 Remain motionless for up to 30 seconds.
NOTE: If you are too active for the watch to get a pulse oximeter reading, a message appears instead of a
percentage. You can check again after several minutes of inactivity. For best results, hold the arm wearing
the watch at heart level while the watch reads your blood oxygen saturation.
4 Press DOWN to view a graph of your pulse oximeter readings for the last seven days.
Setting the Pulse Oximeter Mode
1 Hold MENU.
2 Select Sensors & Accessories > Pulse Oximeter > Pulse Ox Mode.
3 Select an option:
• To turn off automatic measurements, select Manual Check.
• To turn on continuous measurements while you sleep, select During Sleep.
NOTE: Unusual sleep positions can cause abnormally low sleep-time SpO2 readings.
• To turn on measurements while you are inactive during the day, select All Day.
NOTE: Turning on All Day mode decreases battery life.
Tips for Erratic Pulse Oximeter Data
If the pulse oximeter data is erratic or does not appear, you can try these tips.
• Remain motionless while the watch reads your blood oxygen saturation.
• Wear the watch above your wrist bone. The watch should be snug but comfortable.
• Hold the arm wearing the watch at heart level while the watch reads your blood oxygen saturation.
• Use a silicone or nylon band.
• Clean and dry your arm before putting on the watch.
• Avoid wearing sunscreen, lotion, and insect repellent under the watch.
• Avoid scratching the optical sensor on the back of the watch.
• Rinse the watch with fresh water after each workout.
Compass
The watch has a 3-axis compass with automatic calibration. The compass features and appearance change
depending on your activity, whether GPS is enabled, and whether you are navigating to a destination. You can
change the compass settings manually (
).
Setting the Compass Heading
1 From the compass glance, press START.
2 Select Lock Heading.
3 Point the top of the watch toward your heading, and press START.
When you deviate from the heading, the compass displays the direction from the heading and degree of
deviation.
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Sensors and Accessories
