---
title: Light Gate Permanent Calibration
description: Step-by-step instructions for performing a light gate permanent calibration.
---

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# Light Gate Permanent Calibration

## Step-by-step instructions for performing a light gate permanent calibration.

Before conducting a light gate calibration, it is essential to ensure that the system is clean and dry. 

 

![](https://knowledge.rudolphresearch.com/hs-fs/hubfs/image-png-Aug-15-2024-02-28-10-9441-PM.png?width=332&height=53&name=image-png-Aug-15-2024-02-28-10-9441-PM.png)

**Performing a Clean and Dry**

1\. Select Direct Control

2\. Select Clean and Dry

![](https://knowledge.rudolphresearch.com/hs-fs/hubfs/image-png-Aug-15-2024-02-29-57-2988-PM.png?width=369&height=261&name=image-png-Aug-15-2024-02-29-57-2988-PM.png)

---

**Performing a Permanent Light Gate Calibration**

1\. Select Menu

2\. Enter the passcode 123

3\. Select Service Settings

4\. Enter the passcode 519

5\. Select Calibration

6\. Select Light Gate Level Permanent Calibration

7\. A message will appear asking to make sure the system is clean and dry, select continue.

8\. Try running samples to confirm that error is cleared.

 

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