Precor Ellipticals EFX532i - Manual (Page 55)

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 5: 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.
User's Reference Manual: Heart Rate Features 9