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After you put on the heart rate monitor, it is active, storing, and
sending data.
Tips for Using the HRM-Swim Accessory
Adjust the tightness of the heart rate monitor and strap
extender if the heart rate monitor slides down your chest
when pushing off the pool wall.
Stand up between intervals so that the heart rate monitor is
out of the water to see your heart rate data.
Caring for the Heart Rate Monitor
NOTICE
A buildup of sweat and salt on the strap can decrease the ability
of the heart rate monitor to report accurate data.
Rinse the heart rate monitor after every use.
Hand wash the heart rate monitor after every seven uses,
using a tiny amount of mild detergent, such as dishwashing
liquid.
NOTE: Using too much detergent may damage the heart rate
monitor.
Do not put the heart rate monitor in a washing machine or
dryer.
When drying the heart rate monitor, hang it up or lay it flat.
HRM-Tri Accessory
The HRM-Swim section of this manual explains recording heart
rate during your swim (Heart Rate While Swimming, page 9).
Pool Swimming
NOTICE
Hand wash the heart rate monitor after exposure to chlorine or
other pool chemicals. Prolonged exposure to these substances
can damage the heart rate monitor.
The HRM-Tri accessory is designed primarily for open water
swimming, but it can be used occasionally for pool swimming.
The heart rate monitor should be worn under a swim suit or
triathlon top during pool swimming. Otherwise, it may slide down
your chest when pushing off the pool wall.
Putting On the Heart Rate Monitor
You should wear the heart rate monitor directly on your skin, just
below your sternum. It should be snug enough to stay in place
during your activity.
1
If necessary, attach the strap extender to the heart rate
monitor.
2
Wet the electrodes
À
on the back of the heart rate monitor to
create a strong connection between your chest and the
transmitter.
3
Wear the heart rate monitor with the Garmin logo facing right-
side up.
The loop
Á
and hook
Â
connection should be on your right
side.
4
Wrap the heart rate monitor around your chest, and connect
the strap hook to the loop.
NOTE: Make sure the care tag does not fold over.
After you put on the heart rate monitor, it is active and sending
data.
Data Storage
The heart rate monitor can store up to 20 hours of data in a
single activity. When the heart rate monitor memory is full, your
oldest data is overwritten.
You can start a timed activity on your paired Forerunner device,
and the heart rate monitor records your heart rate data even if
you move away from your device. For example, you can record
heart rate data during fitness activities or team sports where
watches cannot be worn. Your heart rate monitor automatically
sends your stored heart rate data to your Forerunner device
when you save your activity. Your heart rate monitor must be
active and within range (3 m) of the device while data is
uploaded.
Caring for the Heart Rate Monitor
NOTICE
A buildup of sweat and salt on the strap can decrease the ability
of the heart rate monitor to report accurate data.
Rinse the heart rate monitor after every use.
Hand wash the heart rate monitor after every seven uses or
one pool swim, using a tiny amount of mild detergent, such
as dishwashing liquid.
NOTE: Using too much detergent may damage the heart rate
monitor.
Do not put the heart rate monitor in a washing machine or
dryer.
When drying the heart rate monitor, hang it up or lay it flat.
Tips for Erratic Heart Rate Data
If the heart rate data is erratic or does not appear, you can try
these tips.
Reapply water to the electrodes and contact patches (if
applicable).
Tighten the strap on your chest.
Warm up for 5 to 10 minutes.
Follow the care instructions (Caring for the Heart Rate
Monitor, page 10).
Wear a cotton shirt or thoroughly wet both sides of the strap.
Synthetic fabrics that rub or flap against the heart rate
monitor can create static electricity that interferes with heart
rate signals.
Move away from sources that can interfere with your heart
rate monitor.
Sources of interference may include strong electromagnetic
fields, some 2.4 GHz wireless sensors, high-voltage power
lines, electric motors, ovens, microwave ovens, 2.4 GHz
cordless phones, and wireless LAN access points.
Running Dynamics
You can use your compatible Forerunner device paired with the
HRM-Tri accessory or other running dynamics accessory to
provide real-time feedback about your running form. If your
Forerunner device was packaged with the HRM-Tri accessory,
the devices are already paired.
The running dynamics accessory has an accelerometer that
measures torso movement in order to calculate six running
metrics.
Cadence: Cadence is the number of steps per minute. It
displays the total steps (right and left combined).
10 Heart Rate Features
16


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