# H Category Options and Descriptions

## H02 LCD Bri. (LCD Brightness) 

Adjusts the brightness of the LCD display. Three levels are available: High, Medium, and Low. The default setting is **Medium**.

| Options | RS-485 Numbers | Remarks |
| ------- | -------------- | ------- |
| Low     | 0              |         |
| Mid     | 1              | Default |
| High    | 2              |         |

After selecting a command, confirm whether to **Save** or **Not Save**.

## H03 Green Light 

Defines the duration for which the green LCD backlight remains active. Options: 10 seconds, 60 seconds, or Always On. The default setting is **Always On**.

| Options       | RS-485 Numbers | Remarks |
| ------------- | -------------- | ------- |
| 60s           | 0              |         |
| **Always On** | 1              | Default |
| 10s           | 2              |         |

After selecting a command, confirm whether to **Save** or **Not Save**.

## H04 Language 

Selects the display language. Currently available options: **English**, **Traditional Chinese**. 

The default language is **English**.

| Options                 | RS-485 Numbers | Remarks |
| ----------------------- | -------------- | ------- |
| **Traditional Chinese** | 0              |         |
| **English**             | 1              | Default |

After selecting a command, confirm whether to **Save** or **Not Save**.

## H05 Paddle Init. (Paddle Initialization)

Press "Start" to initialize the paddle. User needs to rotate the paddle at least 20 rounds until the screen shows "Init. Succeed".
\
If screens shows "Init. Failed", please try again. If the problem persists, please replace your paddle.

| Options | RS-485 Numbers | Remarks |
| ------- | -------------- | ------- |
| No      | 0              |         |
| Yes     | 1              |         |

After selecting a command, confirm whether to **Save** or **Not Save**.

## H06 **Reset (Restore Factory Defaults)**

Clears all custom settings and restores factory default values.

| Options | RS-485 Numbers | Remarks |
| ------- | -------------- | ------- |
| No      | 0              |         |
| Yes     | 1              |         |

After selecting a command, confirm whether to **Save** or **Not Save**.

## H07 **Lock Device (Password Protection)**

Enables the password protection feature to restrict unauthorised access to the settings page. The password can be configured via **H08**. 

The default setting is **Disabled**.

| Options | RS-485 Numbers | Remarks |
| ------- | -------------- | ------- |
| Off     | 0              | Default |
| On      | 1              |         |

After selecting a command, confirm whether to **Save** or **Not Save**.

## H08 **Password (Password Configuration)**

Allows modification of the four-digit password to prevent unauthorised access to the settings page. Password protection must be activated in **H07**. 

The default password is **4321** (for older firmware, the default password is **0000**).

| Default Password | Value |
| ---------------- | ----- |
| Data Type        | int   |
| Default Password | 4321  |
| Minimum          | 0000  |
| Maximum          | 9999  |

After selecting a command, confirm whether to **Save** or **Not Save**.

## H09 Engineering Mode 

This mode is intended **for manufacturer use only**. Do not modify any settings.\ <mark style="color:orange;">The item cannot be modified via RS485.</mark>

## H10 **System Info. Pass (System Information)**

Displays essential system information, including firmware version and hardware details.                      <mark style="color:orange;">The item cannot be modified via RS485.</mark>

## H11 **Home Page (Startup Display)**

Defines the default display shown on the startup screen. The default setting is **Instantaneous Flow Rate**.

| Options      | RS-485 Numbers | Remarks |
| ------------ | -------------- | ------- |
| Flowrate     | 0              | Default |
| Hybird       | 1              |         |
| Status Page  | 2              |         |
| Total \<L>   | 3              |         |
| Flowrate\<L> | 4              |         |
| Total        | 5              |         |

After selecting a command, confirm whether to **Save** or **Not Save**.