True Fitness Cs3.0 Owner's Manual page 11

The CHR system lets you monitor your heart rate without
wearing a strap.
Gently grasp the contact heart rate pads as shown below.
When the system detects your hands, the Heart Rate label will
start flashing in time with your heart beat. During this time, the
system is analyzing and locking in your heart rate. Within about
15 seconds, your digital heart rate in beats per minute should be
displayed.
Important: The CHR System should only be used while walking
at speeds of 4 mph or lower. Above this speed the CHR accuracy is
unavoidably unreliable due to large muscle movements.
CHR (Contact Heart Rate)
chapter one: basic operation
CS Treadmill Owner's Guide
Contact
Heart Rate
(CHR)
11