> For the complete documentation index, see [llms.txt](https://support.onegiantleap.co.nz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.onegiantleap.co.nz/3.0/dragon-boat/calibration/zero-offset/perform-a-zo-calibration.md).

# Perform a ZO calibration

## Step 1. Navigate to the [Calibration](https://app.onegiantleap.co.nz/calibration) page of the Web Bluetooth app and connect to the power meter

![](/files/-Mit2qVG32UvIK9GsFEr)

## Step 2. Perform the Zero Offset Calibration 

* Make sure that the Power Meter is not experiencing any force when you perform the 'ZO' calibration. It's best practice to stand the paddle vertically by leaning it against a wall. This ensures that the shaft is experiencing as little bending as possible. 
* Click on "Zero Offset". The Zero Offsets will update automatically. 

![](/files/-Mit39rLg8ylM1T8offI)