Timex M640 User Manual
Page 76
W
W
a
a
t
t
c
c
h
h
B
B
u
u
t
t
t
t
o
o
n
n
s
s
NOTE: The specific use for these buttons varies by mode. Refer to each
mode for more information on how to use the Watch buttons.
D
D
i
i
s
s
p
p
l
l
a
a
y
y
I
I
c
c
o
o
n
n
s
s
X
You will see the hollow heart icon as the Watch searches for a signal
from the Digital Heart Rate Sensor.
Y
You will see the heart icon fill once the Watch has located a signal
from the Digital Heart Rate Sensor. This icon will continue to flash as
long as the Watch continually receives a signal from the Digital Heart
Rate Sensor.
w
You will see the stopwatch icon to indicate that the Watch is timing
your activity in Chrono Mode.
3
Heart rate represents the effects of exercise on all parts of the body.
Selecting the appropriate heart rate zone conditions the heart, lungs, and
muscles to perform at optimal levels to get and keep your body in shape.
Once set, your Digital Heart Rate Monitor can automatically show you
when you are in the exercise zone you choose and signal you when you
are not. It can help keep your body exercising at an intensity level that can
help you achieve your desired fitness objectives without over- or under-
exercising.
2
WARNING:
This is not a medical device and is not recommended for use by
persons with serious heart conditions.
Interference with the radio signal, poor contact between your skin and the
Digital Heart Rate Sensor, or other factors may prevent accurate
transmission of heart rate data.
START/SPLIT
STOP/SET/RESET
HEART RATE
MODE
INDIGLO
®
night-light