# H Category Options and Descriptions

### **H01 LED Bri. (LED Brightness)**

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

<table><thead><tr><th>Options</th><th width="241.33333333333331">RS-485 Numbers</th><th>Remarks</th></tr></thead><tbody><tr><td>Low</td><td>0</td><td></td></tr><tr><td>Mid</td><td>1</td><td>Default</td></tr><tr><td>High</td><td>2</td><td></td></tr></tbody></table>

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

### **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**.

<table><thead><tr><th>Options</th><th width="241.33333333333331">RS-485 Numbers</th><th>Remarks</th></tr></thead><tbody><tr><td>Low</td><td>0</td><td></td></tr><tr><td>Mid</td><td>1</td><td>Default</td></tr><tr><td>High</td><td>2</td><td></td></tr></tbody></table>

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

### **H03 Green Light (Power Saving Mode for Green Backlight)**

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 |
| ------------- | -------------- | ------- |
| 60 seconds    | 0              |         |
| **Always On** | 1              | Default |
| 10 seconds    | 2              |         |

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

### **H04 Language (Language Settings)**

Selects the display language. Currently available options: **English**, **Traditional Chinese**, and **Simplified Chinese**. The default language is **English**.

| Options                 | RS-485 Numbers | Remarks |
| ----------------------- | -------------- | ------- |
| **Traditional Chinese** | 0              |         |
| **English**             | 1              | Default |
| **Simplified Chinese**  | 2              |         |

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**).

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

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

### **H09 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 |
| Status Page  | 1              |         |
| Dosing       | 2              |         |
| Total (L)    | 3              |         |
| Velocity (L) | 4              |         |
| Flowrate (L) | 5              |         |
| Total        | 6              |         |
| Velocity     | 7              |         |

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

### **H10 Debug Page (Diagnostics Display)**

Activates the diagnostics display. After enabling, return to the main screen and capture the displayed debug information to share with the manufacturer for troubleshooting assistance.

| Options | RS-485 Numbers | Remarks |
| ------- | -------------- | ------- |
| OFF     | 0              |         |
| ON      | 1              | Default |

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

### **H11 Engineering Mode**&#x20;

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>

### **H12 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>

### **H13 Pipe Sensor System (Pipe Diameter Sensor System)**

Configures or displays data related to the pipe diameter sensing system.                                                   <mark style="color:orange;">The item cannot be modified via RS485.</mark>