> For the complete documentation index, see [llms.txt](https://docs.lorric.com/qr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lorric.com/qr/fp-as310-english-v5/parameters/h-system/h07-lock-device.md).

# H07 Lock Device

### Definition

Sets the flow meter’s password protection to prevent unauthorized changes to configuration parameters. Default: Off.

### Notes

* When password protection is enabled, the **default password is 0000**. 
* To change the password, go to **H08 Password**. 
* Once enabled, a password is required to access the **settings menu** from the main screen.

### Operation Procedure

<details>

<summary><strong>Button Functions</strong> <em>(Click to Expand)</em></summary>

The main unit has **four buttons**. The **bottom line (Line 3)** of the LCD displays the current function of each button. Under normal operation, the button functions are as follows:

* <img src="/files/bdd75120acea6361d128fd3deec06f1a8277e667" alt="" data-size="line"> **Blue Button:** Leftmost button: Return, exit, or save settings.
* Gray Direction Buttons:
  * <img src="/files/2e37e572251371c6020ab6d9e11c1fcdd5ef0369" alt="" data-size="line"> **Left Gray:** Previous Page, decrease value, or select item
  * <img src="/files/50a67ff5744401e217d5b9e838da3f7909be732f" alt="" data-size="line"> **Right Gray:** Next Page, increase value, or select item
* <img src="/files/uJJ6BEZ4sukIlwQaHrUB" alt="" data-size="line"> **Orange Button:** Rightmost button: Enter settings, edit, or confirm selection

{% hint style="danger" %}
**Do not hold buttons for extended periods to avoid damage.**
{% endhint %}

{% hint style="info" %}
Button functions may change depending on the operation context to improve usability or prevent accidental presses
{% endhint %}

</details>

<details>

<summary><strong>Password Lock Function (Click to Expand)</strong></summary>

> The password lock function restricts access to and modification of parameters, preventing unauthorized or accidental changes to settings.
>
> The relevant parameters for this function are: [H07 Lock Device](/qr/fp-as310-english-v5/parameters/h-system/h07-lock-device.md), [H08 Password](/qr/fp-as310-english-v5/parameters/h-system/h08-password.md)

{% stepper %}
{% step %}

### H07 Lock Device (Enable/Disable)

```
• H07 Lock Device Setting Steps
• From the main screen (green backlight), 
  press Orange Button (Setup) to enter settings (orange backlight).
• Use Gray Arrow Buttons to select H. System , press Orange Button (Enter).
• Use Gray Arrow Buttons to select H07 Lock Device, press Orange Button (Enter).
• Use Gray Arrow Buttons to choose "ON". 
• Press Orange Button (Set) to confirm.
• Press Blue Button (ESC) to return to the main screen (green backlight).
```

<figure><img src="/files/gRcnfOTGZBAh5rDFg19a" alt="" width="288"><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### **H08 Password Setting**

After enabling **H07 Password Lock**, the default password is **4321**. To change the password, use **H08 Password**.

```
H08 Password Setting Steps
• From the main screen (green backlight), 
  press Orange Button (Setup) to enter settings (orange backlight).
• Use Gray Arrow Buttons to select H. System , press Orange Button (Enter).
• Use Gray Arrow Buttons to select H08 Lock Device, press Orange Button (Enter).
• Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray).
• Press Orange Button(Edit) to enter adjustment mode.
• Adjust digits: Left Gray Button to increase, Right Gray Button to decrease.
• Press Orange Button(SAVE) to confirm each digit
• After all digits are set, press Blue Button(Save).
• Press Blue Button(ESC) to return to the main screen(green backlight).
```

<figure><img src="/files/8umpkK8ViOSHfEUvGwBc" alt="" width="288"><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### **Locked Screen**

When the password lock is enabled, entering the **Settings screen** from the main screen will display the **Password Entry screen**.

Password Entry Screen Instructions:

```
• Use the gray direction keys to select the digit to adjust 
• Press orange Edit to start entering the password.
• Adjust the digit: press the left gray key to increase, the right gray key to decrease.
• After entering the correct password, 
• Press the Blue Button (Check) to access the Settings screen.
• If the password is incorrect, the system will return to the main screen.
```

{% hint style="info" %}

## Incorrect Password & Reset

Incorrect Password Attempts: No limit\
Forgotten Password: Contact LORRIC to obtain the master reset password.
{% endhint %}

<figure><img src="/files/mdqJyx1gUo1T4PKb0FTT" alt="" width="288"><figcaption></figcaption></figure>
{% endstep %}
{% endstepper %}

</details>

### H07 Options, RS485 Values, Read/Write Commands, and Formats

| Option         | Description           | RS-485 Value |
| -------------- | --------------------- | ------------ |
| Off  (Default) |                       | 0            |
| On             | Default password 0000 | 1            |


---

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