Nautilus EV916 Assembly Manual page 41

HEART RATE PRIORITY
The contact heart rate system's ability to detect a heart
rate signal is infl uenced by several factors. Movement
of the muscles of the upper body produces an electrical
signal (muscle artifact) that will interfere with the
detection of the heart rate signal by the sensors.
Movement of the hands while they are in contact with
the sensors also produces interference. Calluses and
hand lotion act as an insulating layer to reduce the
signal strength. Also, the EKG signal generated by some
individuals is not strong enough to be detected by the
sensors. These individuals should opt for the telemetry
method of heart rate monitoring.
Contact heart rate input signals are acquired only
during contact between your hands and the stainless
steel sensors on the handrails. To use the contact heart
rate feature, place your hands around the handles so
that your hands touch both the top and the bottom of
the sensors. After the initial contact heart rate signal
is detected, the controller will enter a validation
phase requiring a good heart beat signal within 10 to
15 seconds, or until the system acquires a valid signal.
During the validation phase the controller will not
recognize telemetry heart rate signals. The controller
will display a heart icon. If, during exercise, the heart
rate displayed is erratic, it may be helpful to remove
your hands from the handles, wipe them and place them
back on the handles. In all programs, the heart rate is
shown automatically in the display window the fi rst
time the sensors are touched.
Heart Rate Priority
Both contact heart rate and telemetry (e.g., Polar®)
heart rate signal detection is available. The default
priority of heart rate input is"LOCKED INPUT." If a
telemetry signal is detected fi rst, contact heart rate
signals are inhibited from being detected throughout the
rest of the workout session and vice-versa.
Locked/Non-Locked Heart Rate
Signal Options
When the"EITHER INPUT" option is selected the heart
rate source signal is not fi xed during the workout
session (if the signal is lost either input will be valid). If
the"LOCKED INPUTS" option is selected then the heart
rate source signal is locked on the fi rst detected signal
during the workout. To set a heart rate signal input, or
to turn off the heart rate option all together, perform the
following steps:
1. On the console keypad, press [Level: UP], [3], [2].
At this point the screen will display"HR INPUTS."
Press [ENTER] to select this option.
2. There are fi ve options to handle heart rate input
signals. Press the [Level: UP] and [Level: DOWN]
keys to scroll through the options until you fi nd the
option that you want. Press the [ENTER] key to
select that option.
The options are as follows:
"LOCKED INPUTS"— allows either telemetry or contact
heart rate signals to be detected. Once the console has
detected a valid input signal it will lock out the opposite
type of signal for the duration of the workout session. For
example, if you start out using contact heart rate then
you are limited to using only contact heart rate during
your workout session, even if the signal is lost while
performing the workout, and vice-versa.
"EITHER INPUT"— allows either telemetry or contact
heart rate signals to be detected. Does not lock out a
particular input signal for the entire workout. Will detect
either input signal during a workout session, but only one
at a time, and only until the other signal terminates.
"TELEMETRY ONLY"— locks out contact heart rate
signals and will only detect telemetry signals.
"HAND ONLY"— locks out telemetry signals and will only
detect contact heart rate signals.
"BOTH HR OFF"— turns off the ability to detect any
heart rate signal. Used in rare situations where there is
excessive interference with the heart rate signals.
During workouts where heart rate is necessary, such as
the HR Zone Trainer and the Fitness Test, the console will
pick up telemetry heart rate signals so that the programs
are not disabled.
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