Sensors And Accessories; Wrist Heart Rate; Wearing The Watch; Tips For Erratic Heart Rate Data - Garmin D2 MACH 1 STANDARD Owner's Manual

Sensors and Accessories

The D2 Mach 1 watch has several internal sensors,
and you can pair additional wireless sensors for your
activities.

Wrist Heart Rate

Your watch has a wrist-based heart rate monitor, and you
can view your heart rate data on the heart rate glance
(Viewing the Glance Loop,
The watch is also compatible with chest heart rate
monitors. If both wrist-based heart rate and chest heart
rate data are available when you start an activity, your
watch uses the chest heart rate data.

Wearing the Watch

Some users may experience skin irritation after prolonged
use of the watch, especially if the user has sensitive skin
or allergies. If you notice any skin irritation, remove the
watch and give your skin time to heal. To help prevent skin
irritation, ensure the watch is clean and dry, and do not
overtighten the watch on your wrist. For more information,
go to garmin.com/fitandcare.
• Wear the watch above your wrist bone.
NOTE: The watch should be snug but comfortable. For
more accurate heart rate readings, the watch should
not shift while running or exercising. For pulse oximeter
readings, you should remain motionless.
NOTE: The optical sensor is located on the back of the
watch.
• See Tips for Erratic Heart Rate Data, page 53
information about wrist-based heart rate.
• See Tips for Erratic Pulse Oximeter Data, page 54
more information about the pulse oximeter sensor.
• For more information about accuracy, go to
garmin.com/ataccuracy.
• For more information about watch wear and care, go to
garmin.com/fitandcare.

Tips for Erratic Heart Rate Data

If the heart rate data is erratic or does not appear, you can
try these tips.
• Clean and dry your arm before putting on the watch.
• Avoid wearing sunscreen, lotion, and insect repellent
under the watch.
• Avoid scratching the heart rate sensor on the back of
the watch.
• Wear the watch above your wrist bone. The watch
should be snug but comfortable.
Sensors and Accessories
page 40).
CAUTION
for more
• Wait until the
activity.
• Warm up for 5 to 10 minutes and get a heart rate
reading before starting your activity.
NOTE: In cold environments, warm up indoors.
• Rinse the watch with fresh water after each workout.
• While exercising, use a silicone band.

Wrist Heart Rate Monitor Settings

Hold MENU, and select Sensors & Accessories > Wrist
Heart Rate.
Status: Enables or disables the wrist heart rate monitor.
The default value is Auto, which automatically uses the
wrist heart rate monitor unless you pair an external
heart rate monitor.
NOTE: Disabling the wrist heart rate monitor also
disables the wrist-based pulse oximeter sensor. You
can perform a manual reading from the pulse oximeter
glance.
While Swimming: Enables or disables the wrist heart rate
monitor during swimming activities.
Abnormal Heart Rate Alerts: Allows you to set the watch
to alert you when your heart rate exceeds or drops
below a target value
Alert, page 53).
Broadcast Heart Rate: Allows you to begin broadcasting
your heart rate data to a paired device
Heart Rate Data,

Setting an Abnormal Heart Rate Alert

This feature only alerts you when your heart rate exceeds
or drops below a certain number of beats per minute,
as selected by the user, after a period of inactivity.
This feature does not notify you of any potential heart
condition and is not intended to treat or diagnose any
medical condition or disease. Always defer to your health
care provider for any heart-related issues.
You can set the heart rate threshold value.
for
1 Hold MENU.
2 Select Sensors & Accessories > Wrist Heart Rate >
Abnormal Heart Rate Alerts.
3 Select High Alert or Low Alert.
4 Set the heart rate threshold value.
Each time your heart rate exceeds or drops below the
threshold value, a message appears and the watch
vibrates.

Broadcasting Heart Rate Data

You can broadcast your heart rate data from your watch
and view it on paired devices. Broadcasting heart rate
data decreases battery life.
TIP: You can customize the activity settings to broadcast
your heart rate data automatically when you begin
an activity (Activities and App Settings,
icon is solid before starting your
(Setting an Abnormal Heart Rate
(Broadcasting
page 53).
CAUTION
page 23). For
53