# Magnetometer calibration

Open **Setting → General**. These switches control device-wide settings. The Tracker detail page has a separate button for calibrating one Tracker's magnetometer.

<figure class="" id="bkmrk-magnetometer-setting">[![Magnetometer setting card, cropped contiguously from the native Settings screenshot.](https://wiki.elecholic.tech/uploads/images/gallery/2026-10/scaled-1680-/img-039-webp.webp)](https://wiki.elecholic.tech/uploads/images/gallery/2026-10/scaled-1680-/img-039-webp.webp)<figcaption>Magnetometer setting card, cropped contiguously from the native Settings screenshot. · Open image at original size.</figcaption></figure>## Magnetometer switch

The **Magnetometer** switch enables or disables the magnetometer for the Tracker set. Its state is sent through the USB dongle; if the receiver is offline, the setting will sync when the receiver reconnects.

The interface warns that magnetometer can cause more drift. Do not turn it on as a routine first-run fix. Only change it if you are following a tested setup instruction or troubleshooting step.

## Calibrate one Tracker's magnetometer

1. In **Device**, click the Tracker you need to calibrate.
2. Check that the Tracker is online and its **Magnetometer** status is **On**. The calibration button stays disabled if the system or this Tracker's magnetometer is off.
3. Click **Magnet Calibration**.
4. Click the **?** help icon and copy the figure-eight movement with the Tracker.
5. Keep moving the Tracker until the sphere fills or the counter reaches **300/300**. Sampling stops automatically at 300 points.
6. Click **Confirm** to close the calibration window.

<figure class="" id="bkmrk-example-magnet-calib">[![Example Magnet Calibration dialog at 000/300; no samples collected or successful calibration implied.](https://wiki.elecholic.tech/uploads/images/gallery/2026-10/scaled-1680-/img-033-webp.webp)](https://wiki.elecholic.tech/uploads/images/gallery/2026-10/scaled-1680-/img-033-webp.webp)<figcaption>Example Magnet Calibration dialog at 000/300; no samples collected or successful calibration implied. · Open image at original size.</figcaption></figure><figure class="" id="bkmrk-figure-eight-calibra">[![Figure-eight calibration help as shown in the app.](https://wiki.elecholic.tech/uploads/images/gallery/2026-10/scaled-1680-/img-034-webp.webp)](https://wiki.elecholic.tech/uploads/images/gallery/2026-10/scaled-1680-/img-034-webp.webp)<figcaption>Figure-eight calibration help as shown in the app. · Open image at original size.</figcaption></figure>**If the counter does not move:** keep the Tracker online and magnetometer On. Reopen the calibration window and follow the displayed figure eight. The number counts collected points, not seconds.

### Issues found while exploring

- One switch controls all Trackers' magnetometers, while calibration opens for a selected Tracker. The interface does not make this difference clear, and it warns that enabling the magnetometer can add drift.
- The figure-eight directions are inside a small help popover. A new user may miss the instructions before starting.

For vibration controls, see [Haptics and vibration](https://wiki.elecholic.tech/books/excap-beginner-guide/page/haptics-and-vibration).