> For the complete documentation index, see [llms.txt](https://help.sbtinstruments.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sbtinstruments.com/item-register/service/preventive-maintenance.md).

# Preventive maintenance

Annual service that renews the wear parts in your BactoBox® and verifies the unit

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<figure><img src="https://4199970748-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAjOYV4v43T0TFlSRqgAp%2Fuploads%2Fgit-blob-f245034f56d015ad1f8f7ff708b3027fbe552464%2Fphoto--service-check-sticker--50073.png?alt=media" alt=""><figcaption><p>We put a <em>Service check</em> sticker on your BactoBox® after preventive maintenance.</p></figcaption></figure>
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:label: Sales item `BB11`

:calendar: Recommended every **12 months**

:package: Shipping **included both ways**
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{% columns %}
{% column width="40%" %} <a href="mailto:sales@sbtinstruments.com" class="button primary" data-icon="envelope">Contact SBT to purchase</a>
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{% column %} <a href="/item-register/service/service-agreement.md" class="button secondary" data-icon="clipboard-check">Service agreement</a>
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<table><thead><tr><th width="100">Item no.</th><th width="106" data-type="number">Quantity</th><th>Note</th></tr></thead><tbody><tr><td><code>BB11</code></td><td>1</td><td><strong>BactoBox preventive maintenance</strong><br><mark style="color:$info;">Our annually recommended preventive maintenance for BactoBox. Includes shipping.</mark></td></tr><tr><td><code>SA02</code></td><td>2</td><td><strong>24-months warranty and preventive maintenance</strong><br><mark style="color:$info;">Two preventive maintenance events are included in the</mark> <a href="/item-register/service/service-agreement.md">service agreement</a><mark style="color:$info;">.</mark></td></tr></tbody></table>

## Why your BactoBox® needs it

Your BactoBox® has parts that wear with use, mainly the pump tubing and the internal filter. Preventive maintenance renews those parts and confirms that the unit still performs.

Without it, the wear parts are never renewed and the setup slowly moves toward a failure. BactoBox® flags this early with the [Check engine light](/maintenance/check-engine-light.md). If no maintenance follows, you risk a rising error rate, unplanned downtime, and repair costs.

## When to schedule it

* At least once every 12 months.
* Whenever the [Check engine light](/maintenance/check-engine-light.md) shows.

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**The date is not strict**

Think of it like a car service. Do it around the planned date. A month or two late does not break anything. We schedule each event so it suits your lab.
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## What we do

Our technical team in Denmark works through the same written checklist on every unit. The technician records your serial number, signs the checklist, and dates it. The scope may grow over time as we improve it.

1. **Incoming check.** We run a deep clean, then a QC test and an electronics test, so we know how your unit performed when it reached us. We note its hardware version, configuration and software version.
2. **Hardware.** We inspect the unit for damage, and check that the keys move smoothly, every cable is seated, and all mountings are tight.
3. **Flow system.** We replace the pump tube, the internal filter and the [external filter](/item-register/individual-items/external-filter.md). We clean out any fluid residue inside the unit, check that all tubing is seated, and inspect your tubing kit.
4. **Testing.** We test the conductivity measurement, wash the unit out, and inspect for leaks while it runs.
5. **Quality control.** We run three consecutive QC tests.
6. **Wrap up.** We register the maintenance event on the device, apply the *Service check* sticker, and clean the unit.

If we find anything abnormal, or a part close to failing, we deal with it before the unit goes back to you.

{% hint style="info" %}
**We do not change your software**

An update can change how your unit behaves, so we leave that decision with you. We note the version your unit runs. If it is not the [latest release](/software/bactobox-r-software-changelog.md), we contact you.
{% endhint %}

## How it works

1. Contact SBT and we agree a date that suits you.
2. You ship the unit to our technical team in Denmark. Shipping is included both ways, so you do not raise a separate purchase order for it.
3. We service the unit, run the checks, and apply the *Service check* sticker.
4. The unit ships back to you.

## Buy one, or get two in the service agreement

`BB11` is a single preventive maintenance event, bought whenever you need it. The [service agreement](/item-register/service/service-agreement.md) packages two of them together with a 24-month warranty.

{% content-ref url="/pages/C2nMuyIrUxA2AmXfnp07" %}
[Service agreement](/item-register/service/service-agreement.md)
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