# Menu system
## Get to the menu
Press and hold Stop for 1 second to open the menu. The menu looks like this:
The menu screen at the root level
## Get out of the menu
Press ← until you reach the root menu. Select *Home*. Press OK to return to the home screen.
## Menu screens
In this section we explain the purpose of selected menu screens.
### History
View the results of your past measurements.
### Programs
Apart from the button programs, BactoBox® has a few specialized programs.
Click the tabs to read more about the available programs.
{% tabs fullWidth="false" %}
{% tab title="Conductivity" %}
Select *Conductivity* to run a conductivity check.
The device reports electrical conductivity (EC) in µS/cm. The value is **not** temperature-compensated.
{% endtab %}
{% tab title="Deep clean" %}
Run *Deep clean* to remove hard-to-clean deposits in the liquid path.
See [Deep clean explained](https://help.sbtinstruments.com/protocols/maintenance/deep-clean).
{% endtab %}
{% tab title="QC test" %}
See [qc-test](https://help.sbtinstruments.com/getting-started/qc-test "mention").
{% endtab %}
{% tab title="Custom measurement" %}
Use *Custom measurement* for special gating settings (for example, endospores).
Create custom programs in BactoBox Explorer. Upload them via Access.
{% endtab %}
{% tab title="Measure with low conductivity" %}
Use *Measure with low conductivity* when you need extra contrast between intact cells and background.
The program uses 1-in-20 PBS. This can improve phase shift separation. It may reduce signal-to-noise ratio.
{% endtab %}
{% endtabs %}
{% hint style="info" %}
Press and hold Measure for 1 second from the home screen to access the *Programs* menu.
{% endhint %}
### System info
Contains network, storage, legal, and version information.
{% tabs %}
{% tab title="Network" %}
Shows the BactoBox® ID. It also shows network connectivity (mainly used by SBT service).
{% endtab %}
{% tab title="Storage" %}
Shows how much storage space is left on the device.
{% endtab %}
{% tab title="Legal info" %}
Lists software licensing information.
{% endtab %}
{% tab title="Versions" %}
Shows hardware, firmware, and software versions.
{% endtab %}
{% endtabs %}
### Time and date
It is possible to manually set time, date, and time zone.
{% tabs %}
{% tab title="Time" %}
Select *Set time*.
Use ∨∧ to change the hour. Press OK to move on.
Use ∨∧ to change minutes. Press OK to submit.
{% endtab %}
{% tab title="Date" %}
Select *Set date*.
Use ∨∧ to change the year. Press OK to move on.
Repeat for month and day.
Select *Submit*. Press OK to apply the date.
{% endtab %}
{% tab title="Time zone" %}
Select *Set time zone*.
Use ∨∧ to select a continent. Press OK.
Select an area or city. Press OK.
Select *Submit*. Press OK.
{% endtab %}
{% endtabs %}
{% hint style="info" %}
Restart the device to apply the changes.
{% endhint %}
### Service
The service menu contains maintenance features like the possibility of deleting all data if needed.
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