Polar Electro T31C Guide

USER GUIDE
Polar T31/T31C Transmitter Maintenance
With good care your T31 / T31C heart rate sensor last longer. Dirt impairs the elasticity and
functioning of the heart rate sensor.
Wash the heart rate sensor regularly after use. T31 / T31C heart rate sensors should be
washed with a mild soap and water solution. After washing, dry the heart rate sensor carefully
with a soft towel.
If the electrodes appear discolored, you may use a gentle brush. Do not use any alcohol or a
solvent based detergent.
Rinse the elastic strap with water after every use and wash it regularly in a washing
machine at 40ºC/104ºF. This ensures reliable measurement and maximizes the life span of the
heart rate sensor. Use a washing pouch. Do not soak, spin-dry, iron, dry clean or bleach the strap.
Do not use detergent with bleach or fabric softener. Hang the elastic strap up to dry.
Wash the elastic strap in a washing machine before long-term storage, and always after use in
pool water with high chlorine content. Never put the heart rate sensor in the washing machine or
drier!
Never store the heart rate sensor wet, in a damp environment or in any kind of non-
breathing material, such as a plastic bag or a sports bag. Sweat and moisture may keep the
electrodes wet and the heart rate sensor activated. This will shorten the battery life. Keep in a
cool and dry place.
Do not bend or stretch the heart rate sensor. This may damage the electrodes.
How does a Polar Training Computer measure heart rate?
Heart rate is like a window into your physical condition. It tells you your body's exertion level.
The harder you train, the higher amount of oxygen you consume and the higher your heart rate
is. By listening to your heart rate, by peering through that window into your physical condition,
you get real-time guidance during training that is specific to you.
A Polar training computer helps you to listen to your body. Each training computer has two
parts: the training computer itself and a heart rate sensor to read your heart rate.

The heart rate sensor is attached around the chest with an elastic strap. It detects your heart beat,
the electric signal of the heart, at the accuracy and reliability of the electrocardiogram (ECG). It
then gives a timing reference for the heart beat occurrences and transmits the information to the
training computer. The training computer reads this transmission from the heart rate sensor and
calculates the number of beats per minute your heart is working at.
By listening to your heart, the training computer can tell you exactly how hard you need to
exercise and for how long so that you get the most out of each exercise session.
Polar training computers offer a variety of different features, all based on your individual heart
rate. To find out what Polar features your training computer supports, please see your product
user manual.
How do I change the battery to my heart rate sensor?
Your heart rate sensor battery may need replacing if:
training computer does not show heart rate reading
heart rate reading is erratic or stays unchanged for a long time
heart symbol does not blink.
For information on possible sources for transmission interference, see Abnormal heart rate readings
during the exercise.
When changing the battery of your training computer at Polar Service Center, have your heart
rate sensor battery checked as well.
Sensor pairing is needed after update / battery replacement, if you use H10 with Polar A360,
M400, A300, M450, V650, V800, M200, M600 or 3rd party app / device.
I have a heart rate sensor with a textile strap
Average battery lifetime of a heart rate sensors can be found in the product user manual.
You can change the sensor battery yourself. If you'd like help, please contact your closest Polar
Service Center to have it changed for you.
To change battery yourself, see the instruction video for H7 and WearLink or

H1/H2/H3/H6/H10 or check out your sensor user manual for instructions.
If your heart rate sensor is under warranty, we recommend that the battery be changed by a Polar
Service Center.
With good care your heart rate sensor lasts longer. Washing the heart rate sensor regularly ensures
reliable measurement and maximizes its life span. See here for product-specific care and maintenance
instructions.
I have a Polar T31 / T31C transmitter
The average battery lifetime of Polar T31 and T31C Transmitter is 2500 hours of use.
When the battery dies, you will need to replace the whole heart rate sensor (structure of the
transmitter is sealed). Find nearest Polar retailer from Polar Service Finder.
With good care your T31/T31C Transmitter will last longer. Washing the heart rate sensor regularly and
never storing it wet ensures reliable measurement and maximizes its life span. See here for detailed care
and maintenance instructions.
Do not dispose of this product as unsorted municipal waste. To minimize possible effects of
waste on the environment, please follow local waste disposal regulations and, where possible,
utilize separate collection of electronic devices.
Interference caused by fitness equipment
Some exercise equipment with electronic or electrical components such as LED displays, motors,
and electrical brakes may cause interfering stray signals. However, this type of interference can
usually be overcome by relocating the Training Computer.
1. Remove the heart rate sensor from your chest and use the exercise equipment as you would
normally.
2. Move the Training Computer around (still in recording mode) until you find an area in which
it displays no stray reading from the exercise equipment or does not flash the heart symbol.
Interference is often worst directly in front of the display panel of the equipment, while the left
or right side of the display is relatively free of disturbance.

3. Place the heart rate sensor back onto your chest and keep the Training Computer in this
interference-free area as much as possible.
If the Training Computer still does not work with the exercise equipment, it may be electrically
too noisy for wireless heart rate measurement.
What sensors and accessories is my Polar training computer compatible
with?
Compatible heart rate sensors
All Polar heart rate sensors can be worn in water. Only sensors with GymLink transmission detect heart
rate while swimming. Only GymLink compatible wrist units (marked with in the table
below) show heart rate in water, if other requirements are met.
Polar T31
transmitter
Polar T31
coded
transmitter
P
o
l
a
r
H
1
Polar H2
Polar H3
Polar H6
Polar H7
Polar H10
Polar OH1
Polar
WearLink
transmitter
Nike+
P
o
l
a
r
W
e
a
r
L
i
n
k
t
r
a
Polar
WearLink
Hybrid

n
s
m
i
t
t
e
r
Transmission
technology
non-coded
***
***
***
***
A300 ***
-
-
-
-
-
-
x
x
x
x
A360, A370 ***
-
-
-
-
-
-
x
x
x
x
CS500+,
CS600X
-
-
-
-
x
x
-
-
-
-
FA20**
-
-
-
-
-
-
-
-
-
-
FT1, FT2
z
x
x
x
x
-
-
x
x
-
FT4, FT7, FT40,
FT60, FT80
-
x
x
x
x
-
-
x
x
-
M200 ***
-
-
-
-
-
-
x
x
x
x
M400 ***
-
-
-
-
-
-
x
x
x
x
M430 ***
-
-
-
-
-
-
x
x
x
x
M450 ***
-
-
-
-
-
-
x
x
x
x
M460 ***
-
-
-
-
-
-
x
x
x
x

(Polar app on
the) M600
-
-
-
-
-
-
x
x
x
x
Polar Active **
-
-
-
-
-
-
-
-
-
-
Polar Loop***
-
-
-
-
-
-
x
x
x
x
Polar Loop 2
***
-
-
-
-
-
-
x
x
x
x
Polar Loop
Crystal***
-
-
-
-
-
-
x
x
x
x
Polar Move
-
x
x
x
x
-
-
x
x
-
RC3 GPS
-
-
-
-
x
x
-
-
-
-
RCX3
-
-
-
-
x
x
-
-
-
-
RCX5
-
x
x
x
x
x
-
x
x
-
RS100
z
x
x
x
x
-
-
x
x
-
RS300X
-
x
x
x
x
-
-
x
x
-
RS400
-
x
x
x
x
-
-
x
x
-
RS800CX
-
-
-
-
x
x
-
-
-
-
V800***
-
-
-
-
-
-
x
x
x
x
V650***
-
-
-
-
-
-
x
x
x
x
Vantage M
x
x
x
x
Vantage V
x
x
x
x

x Compatible
Incompatible
z This training computer uses GymLink transmission. You can use a non-coded GymLink
transmission with this training computer, too, but then Polar OwnCode® feature is not
supported. If the training computer does not find the GymLink heart rate signal at the beginning
of the exercise (in approx. 30 seconds), the non-coded GymLink heart rate signal is used instead.
** This activity computer is used for activity measurement. It does not support heart rate
monitoring functionality.
*** The Bluetooth Smart transmission which H10, H7 and H6 heart rate sensors use, is
compatible with Bluetooth Smart and Bluetooth Smart Ready devices and applications that fully
supports standardized Bluetooth Smart heart rate functionality.
You can use a GymLink compatible Polar Bluetooth Smart sports watch (A300 or V800)
together with a GymLink heart rate sensor to measure heart rate in water sports. If a GymLink
heart rate sensor is used with other than the water sport profiles, the heart rate value is not shown
in pre-training mode and it is shown in grey during training recording. If you are wearing H7
or H10 in water, the Bluetooth Smart signal is ignored by A300/V800.
Other compatible sensors and accessories
Training
Computer
Data
transfer
device
Stride
sensor
GPS
Speed
sensor
Cadence
sensor
Bike Mount
Power
Sensor
Scale
A300
USB port
Universal
Polar
Balance
scale
A360, A370
Polar
Balance
scale
FA20
FlowLink
Universal
FT1 / FT2
Universal
FT4
Universal
FT7
FlowLink
Universal
FT40
FlowLink
Universal

FT60
FlowLink
s1
G1
Universal
FT80
FlowLink
s1
G1
Universal
CS500+
DataLink
CS W.I.N.D.
CS W.I.N.D.
Dual Lock
W.I.N.D. /
Kéo Power
CS600X
IrDA USB
G3 /
G5
CS W.I.N.D.
CS W.I.N.D.
Twist Lock
W.I.N.D. /
Kéo Power
M400
USB Cable
Stride
Sensor
Bluetooth
Smart
Universal
Polar
Balance
scale
M430
USB Cable
Stride
Sensor
Bluetooth
Smart
Universal
Polar
Balance
scale
M450,
M460
USB Cable
Speed
Sensor
Bluetooth
Smart
Cadence
Sensor
Bluetooth
Smart
Polar
Adjustable
Bike Mount
Kéo Power
Bluetooth
Smart
(Polar app
on the)
M600
*
Polar Loop
Polar
Balance
scale
Polar Loop
2
Polar
Balance
scale
Polar Loop
Crystal
Polar
Balance
scale
RC3 GPS
USB Cable
s3 / s3+
CS W.I.N.D.
CS W.I.N.D.
Universal
RCX5 /
RCX3
DataLink
s3 / s3+
G3 /
G5
CS W.I.N.D.
CS W.I.N.D.
Universal
RS100
Universal
RS300X
FlowLink
s1
G1
Universal

RS400
IrDA USB
s1
Universal
RS800CX
IrDA USB
s3 / s3+
G3 /
G5
CS W.I.N.D.
CS W.I.N.D.
Universal
V800
USB Cable
Stride
Sensor
Bluetooth
Smart
Speed
Sensor
Bluetooth
Smart
Cadence
Sensor
Bluetooth
Smart
Universal
Kéo Power
Bluetooth
Smart
Polar
Balance
scale
V650
USB Cable
Speed
Sensor
Bluetooth
Smart
Cadence
Sensor
Bluetooth
Smart
Polar
Adjustable
Bike Mount
Kéo Power
Bluetooth
Smart
Vantage M
USB Cable
Stride
Sensor
Bluetooth
Smart
Speed
Sensor
Bluetooth
Smart
Cadence
Sensor
Bluetooth
Smart
Bike mount
for Polar
sports
watches
Kéo Power
Bluetooth
Smart
Vantage V
USB Cable
Stride
Sensor
Bluetooth
Smart
Speed
Sensor
Bluetooth
Smart
Cadence
Sensor
Bluetooth
Smart
Bike mount
for Polar
sports
watches
Kéo Power
Bluetooth
Smart
* You can pair the Balance scale with your Polar Flow account and use the activity tracking data from the
Polar app on your M600 to get personalized guidance on how to maintain or lose weight.