Precor EFX 425 User Manual page 40

The Displayed Heart Rate Is Wrong Or
SmartRate Doesn't Work
The touch-sensitive grips may not be making secure
contact. Try the following solutions:

Make sure that your hands are clean, slightly
moist, and positioned as described earlier in this
table.

Try using a chest strap instead of the grips.
If you are trying to use the grips and an active chest
strap at the same time, choose one or the other. Either
do not grasp the touch-sensitive grips, or remove or
turn off the chest strap.
Measuring Your Heart Rate
35