# Skimmer Calibration

## Tools Needed

Before we start the calibration, you will need

* pH7 calibration solution
* pH10 calibration solution
* Sensor plastic cap for fluid
* Protective gloves

## Step 1 - Plug in skimmer

Take the skimmer out from the pool and plug in the USB so that the blue light comes on.

<figure><img src="https://1838281737-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCgJ72dWivGOMwepBymYy%2Fuploads%2FXewiR2tDZiBTjNmVPLPG%2Fimage.png?alt=media&#x26;token=8c2450b4-1a41-4ea2-bc71-639fb4545c10" alt="" width="375"><figcaption><p>Skimmer plugged in, charging mode</p></figcaption></figure>

## Step 2 - Fill up sensor plastic cap with pH7 solution

{% hint style="info" %}
This solution is yellow, yours may be a different color.
{% endhint %}

{% hint style="danger" %}
Corrosive Liquid Warning - Although pH buffer solutions are typically safe, please consider wearing gloves when performing these steps.
{% endhint %}

Please fill up the cap about a fifth of the way full with the solution.

<figure><img src="https://1838281737-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCgJ72dWivGOMwepBymYy%2Fuploads%2FyaTSul7d7VxfScGdmwSG%2Fimage.png?alt=media&#x26;token=2fa44996-809c-4d1a-b0fc-adeaf26f992b" alt="" width="295"><figcaption><p>Example of pH7 solution</p></figcaption></figure>

## Step 3 - Place cap on skimmer sensor

Now, please screw on the liquid filled cap to the bottom of the sensor, and ensure that the sensor is fully submerged in the liquid before proceeding.

<figure><img src="https://1838281737-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCgJ72dWivGOMwepBymYy%2Fuploads%2FtXFvEv44wlaj2dgMfCyY%2Fimage.png?alt=media&#x26;token=af3b5142-92d9-472e-bfa7-86e9da0c5839" alt="" width="293"><figcaption><p>Sensor cap on with ph7 liquid</p></figcaption></figure>

## Step 4 - Calibrate in app

Now, go to your location in the app and select "Settings->Calibration". Select pH7 under your smart skimmer and click the prompts to continue.

<figure><img src="https://1838281737-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCgJ72dWivGOMwepBymYy%2Fuploads%2FhvcuV95ZeBZJ57yOvjHH%2Fimage.png?alt=media&#x26;token=b51142bd-44a0-4b6a-9b1b-2b26bc45a9ab" alt="" width="187"><figcaption><p>Skimmer calibration screen</p></figcaption></figure>

Once you click ph7, your device should begin to pulse pink.

<figure><img src="https://1838281737-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCgJ72dWivGOMwepBymYy%2Fuploads%2FOJgv6AynCsDGF4JE0x4Z%2Fimage.png?alt=media&#x26;token=14f1af61-cca4-4670-b2af-1db6c60c8640" alt="" width="375"><figcaption><p>Calibration in progress</p></figcaption></figure>

You will see a green light if the calibration was successful. If you see a red light, please repeat the steps above again.

## Step 5 - ph10 Calibration

Please remove the yellow ph7 fluid, wash the cap with water, and perform the previous steps for ph10.
