Manual Stages Cycling Stages Power (page 5 of 10) (English)

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Pairing the power meter

The power meter must be connected or “paired” to the cycle computer or

mobile device (collectively referred to as display units) according to the display

manufacturer’s instructions. Each power meter has a unique ANT+ device ID

and a unique Bluetooth ID. During the pairing process the applicable device ID

is recorded by the display and will be used to communicate with the

corresponding power meter. The ANT+ ID number is printed on the back of

the power meter and also supplied with the documentation. The Bluetooth ID

is recognized and displayed by the Bluetooth device during the pairing

process. Once paired to the power meter, ride data (Watts and RPM) will be

transmitted from the power meter to the display unit. Other important

functions such as resetting the power meter’s zero oset will also be enabled

through the display unit. Both the ANT+ and Bluetooth IDs are

permanently assigned to the power meter and are not aected by

changing the power meter battery.

ANT+: Ensure the power meter has a fully charged CR2032 battery properly

installed. Rotate the crank arm one time to ensure the power meter is awake

and ready to communicate. Follow the ANT+ device manufacturer’s

instructions for pairing a power meter to the display unit. The procedures may

vary between manufacturers.

Bluetooth Smart: Ensure the power meter has a fully charged CR2032 battery

properly installed. Rotate the crank arm one time to ensure the power meter is

awake and ready to communicate. Follow the Bluetooth Smart Ready (4.0)

device manufacturer’s instructions for pairing a power meter to the display

unit. The procedures may vary between manufacturers.

Zero oset calibration

The zero oset calibration is an important feature of the power meter that

resets the zero oset value for the power meter sensors. There are physical and

environmental conditions that may aect the zero oset value and there are

methods both manual and automatic that will adjust this value to

accommodate for the changing physical and environmental condition. The

zero oset of the power meter is essentially the sensor reading or values

measured when the power meter has no pedaling load (torque) applied. The

act of calibrating the zero oset causes the power meter to measure the value

at zero load and then records this value as the baseline for power

measurement. Loads applied while pedaling will then be measured as torque

and used by the sensor to determine power in Watts. The zero oset value can

be aected by the installation of the crank arm and the tightening of the

securing hardware. The torque applied to the securing hardware can impart

some strain into the crank material that is easily accounted for by manually

calibrating the zero oset. Any time the power meter is removed from the bike

and reinstalled the zero oset should be calibrated.

Ambient temperature shifts can also aect the zero oset to some extent. To

ensure maximum accuracy it is advisable to manually calibrate the zero oset

before each ride. The power meter utilizes automatic temperature sensors to

compensate for temperature changes that take place during the ride. This is

done automatically while you ride and you need not take any further steps to

calibrate the sensor during the ride.

How to calibrate the zero oset

Calibrating the zero oset is a function controlled by the cycle computer or

mobile device (display units) paired to the power meter. Please note that some

device manufacturers refer to the step of resetting the zero oset as

“calibration”. When paired to a compatible ANT+ cycle computer or Bluetooth

Smart mobile device, the power meter and display units are in two-way

communication. The display unit can send a command to the power meter to

calibrate the zero oset value and in some cases the resulting zero oset value

will be sent back from the power meter to the display unit and be shown on the

screen. Please note the displayed zero oset value will NOT be zero but rather

a number that corresponds to the measurement taken by the sensor.The

display units will also indicate if the procedure was successful or failed.

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Stages Cycling Stages Power Manual

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