> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/boomerang-3-calibration-app-manual/performing-the-calibration/collect-measurements.md).

# Collect measurements

After the calibration is finished, its row state changes to “Calibration completed”.

<figure><img src="/files/evzXjMSNdpOE3SW7OoQQ" alt="" width="419"><figcaption></figcaption></figure>

Tap “Sign and finalize” button to finish the calibration.

&#x20;The app collects the reference and calibrated sensor readings to calculate the adjustment and uncertainty values.

<figure><img src="/files/XfRmtPWoct4p0odtHWma" alt="" width="308"><figcaption><p>Automatic</p></figcaption></figure>

<figure><img src="/files/7CQOTeOF6C1R7FNL9juJ" alt="" width="313"><figcaption><p>Manual</p></figcaption></figure>

To read the reference measurements:

\-          for Dostmann, enable its Bluetooth interface as described in [Dostmann P790](/boomerang-3-calibration-app-manual/calibration-set/reference-thermometers/dostmann-p790.md) chapter,

\-          for WLREF sensor, push its button to wake it up.

<figure><img src="/files/H74o2gGwlkQJcmZbMZWC" alt="" width="316"><figcaption><p>Automatic</p></figcaption></figure>

<figure><img src="/files/Z6mRwK4Arguy4ZZo1r6y" alt="" width="317"><figcaption><p>Manual</p></figcaption></figure>

After the reference meter data are read P790 disables its Bluetooth interface automatically so there is no need to disable it manually. No action is needed for WLREF.

In case of automatic calibration, the app reads the calibrated sensor measurements automatically from Boomerang 3. The next steps are described in [Finalise calibration](/boomerang-3-calibration-app-manual/performing-the-calibration/finalise-calibration.md).

For manual calibration, the user must enter the calibrated sensor measurements before finalisation, as described in [Enter values for manual calibration](/boomerang-3-calibration-app-manual/performing-the-calibration/collect-measurements/enter-values-for-manual-calibration.md).


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