Precor Elliptical Fitness Crosstrainer EFX - Manual (Page 32)

User's Reference Manual: Heart Rate Features 14
Using the Touch-Sensitive Grips
While exercising, you must grasp both touch-sensitive grips for a
minimum of five to ten seconds to transmit your heart rate to the
display. Refer to the following figure.
Figure 8: Touch-sensitive grips
Usually, the concentration of salts in a person’s perspiration
provides enough conductivity to transmit a signal to the receiver
inside the display console. However, some people, because of
body chemistry or erratic heart beats, cannot use the
touch-sensitive grips. A chest strap may provide better results.
Important: While exercising, do not wear a chest strap and grasp
the touch-sensitive grips at the same time. Using both features
may cause erratic heart rate readings.