Regarding the firmware update of the SGX-CA500

July 30, 2014

In order to ensure you receive the most accurate and enjoyable experience from your SGX-CA500 Cyclocomputer, please confirm the content of the changes and update your Cyclocomputer to the latest version of the Firmware.

Main improvements


1. The CycloComputer (SGX-CA500) calculates the Power Values based on the Force Values transmitted from the SGY-PM910H Sensors. We have implemented a change to the parameters used in this calculation to make the calculated Power Values better reflect the actual power applied to the crank by the rider. As a result of this change, Power Values may be up to 3% lower than previously measured.
We have also implemented new functionality that allows adjustment of the parameters used in this calculation to give the user greater control over the accuracy of their Power Values. (Force Vectors and Efficiency Values will be unchanged.)

Please see here for details.

2. The calculation of Gradient has been improved.
Use of an external speed sensor allows more accurate measurement of the gradient.

Update method

Use the update procedure below to update your firmware.
The update procedure using Wi-fi is here
The update procedure using Cloud Connect (Windows) is here
The update procedure using Cloud Connect (Mac) is here
The firmware update requires from 20 to 30 minutes in a high speed Internet environment.

Version of firmware after update

Version of firmware : 20140709.02.36
You can check the version of your firmware as described below.
Confirmation procedure : [Settings] - [System] - [Firmware Version]


・Confirm that there is enough power remaining in the Cyclocomputer's batteries.
・Do the update in an environment that has a stable internet connection, that is not subject to interruptions.

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