How to use the chest pulse sensor, Chest pulse sensor troubleshooting, Chest pulse sensor care and maintenance – NordicTrack NTL21905.0 User Manual
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HOW TO USE THE CHEST PULSE SENSOR
HOW TO PUT ON THE CHEST PULSE SENSOR
The chest pulse sensor consists of two components— 
the chest strap and the sensor unit.
• Store the chest pulse sensor in a warm, dry place.
Do not store the chest pulse sensor in a plastic bag
or other container that may trap moisture.
• Do not expose the chest pulse sensor to direct
sunlight for extended periods of time; do not expose 
it to temperatures above 122° Fahrenheit (50° 
Celsius) or below 14° Fahrenheit (-10° Celsius).
• Do not excessively bend or stretch the sensor unit
when using or storing the chest pulse sensor.
• Clean the sensor unit using a damp cloth—never
use alcohol, abrasives, or chemicals. The chest 
strap may be hand washed and air dried.
CHEST PULSE SENSOR TROUBLESHOOTING
Insert the tab on one end of the chest strap into the 
hole in one end of the sensor unit, as shown in the inset 
drawing above. The tab should be flush with the front of 
the sensor unit.
Next, wrap the ohest 
pulse sensor around 
your chest and attach 
the other end of the 
chest strap to the 
sensor unit. Adjust 
the length of the 
chest strap, if neces
sary. The chest pulse
sensor should be under your clothes, tight against your 
skin, and as high under the pectoral muscles or 
breasts as is comfortable. Make sure that the logo on
the sensor unit is facing forward and is right-side-up.
Pull the sensor unit away from your body a few inches
and locate the two electrode areas on the inner side
(the electrode areas are covered by shallow ridges). 
Using saline solution such as saliva or contact lens so
lution, wet both electrode areas. Return the sensor unit 
to a position against your chest.
CHEST PULSE SENSOR CARE AND MAINTENANCE
• Thoroughly dry the chest pulse sensor after each
use. The chest pulse sensor is activated when the 
electrode areas are wetted and the heart rate 
monitor is put on; the chest pulse sensor shuts off 
when it is removed and the electrode areas are 
dried. If the chest pulse sensor is not dried after 
each use, it may remain activated longer than nec
essary, draining the battery prematurely.
The
instructions on the following pages explain
how the chest pulse sensor is used with the con
sole. If the chest pulse sensor does not function
properly, try the steps below.
• Make sure that you are wearing the chest pulse sen
sor as described at the left. Note: If the chest pulse 
sensor does not function when positioned as de
scribed, move it slightly lower or higher on your chest.
• Use saline solution such as saliva or contact lens
solution to wet the two electrode areas on the 
sensor unit. If heart rate readings do not appear until 
you begin perspiring, rewet the electrode areas.
• As you walk or run on the treadmill, position your
self near the center of the walking belt. For
the
console to display heart rate readings,
the
user
must be within arm’s length of the console.
• The chest pulse sensor is designed to work with
people who have normal heart rhythms. Heart rate 
reading problems may be caused by medical 
conditions such as premature ventricular contrac
tions (pvcs), tachycardia bursts, and arrhythmia.
• The operation of the chest pulse sensor can be
affected by magnetic interference caused by high 
power lines or other sources. If it is suspected that 
this is a problem, try relocating the treadmill.
• The CR2032 battery may need to be replaced (see
page 32).
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