# C03 Dosing Mode

### Definition

Set the totalizer counting direction—whether it counts upward or downward from the set value. Default: disabled.

<details>

<summary><strong>Dosing Function (Click to Expand)</strong></summary>

#### 1. Flow Meter Dosing Function Description

The dosing function controls a valve based on the flow meter’s totalizer. When the accumulated volume reaches the preset target, the valve closes automatically. After the set buffer time, the totalizer resets to zero, preparing for the next dosing cycle.

This function enables dosing control directly through the flow meter without an external PLC, making it suitable for chemical dosing, liquid replenishment, and batching applications.

#### **2. Parameter Configuration Table**

| Parameter Code | Function          | Description                                                   | Recommended Setting                             |
| -------------- | ----------------- | ------------------------------------------------------------- | ----------------------------------------------- |
| E02            | OCT Definition    | Sets the control output mode                                  | Must be set to **Dosing mode**                  |
| C03            | Dosing Mode       | Enables the dosing function                                   | Set to **On**                                   |
| C04            | Dosing Target     | Sets the target volume per dosing cycle                       | Enter as required (unit: L)                     |
| C05            | Dosing Reset Time | Sets the buffer time after the target is reached before reset | Set based on system response time (unit: s)     |
| H09            | Startup Screen    | Sets the main display screen                                  | Set to **Dosing mode screen**                   |
| D16            | Dosing Alarm      | Alarm indication when dosing is completed                     | Enable as required or set to **Do Not Disturb** |

#### 3. Dosing Operation

After the valve opens, fluid flow begins and the flow meter accumulates volume in real time. When the accumulated volume reaches the dosing target set in **C04**, the system closes the valve according to the **OCT output logic defined in E02**, completing the dosing cycle. A “Dosing Complete” alarm is then triggered based on the **D16** setting.

The system then enters the reset delay defined in **C05**. Once the delay time elapses, the totalizer is automatically reset to zero and the system is ready for the next dosing cycle.

<figure><img src="broken-reference" alt="" width="563"><figcaption></figcaption></figure>

{% hint style="info" %}
Due to response time delays in valve actuation and control signals, the actual dosing result may differ slightly from the set value. This deviation becomes more noticeable with smaller dosing volumes, higher flow rates, or longer distances between the valve, flow meter, and container.

For higher dosing accuracy, select an appropriate pipe size and piping layout. It is recommended to perform on-site testing and adjust the calibration (scaling) factor as needed before actual operation.
{% endhint %}

</details>

### Notes

1. After enabling **C03**, also configure **C04**, **C05**, **E02**, and **H09** accordingly.
2. If the control valve’s drive current is compatible, the flow meter’s built-in dosing function can be used directly with the valve to achieve the required dosing operation, without additional PLC programming.

### Operation Procedure

<details>

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

When the main screen is displayed in **green backlight**, the four buttons function as follows:

* <img src="https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FRnX1fMK1ja5FUx043ZYc%2Fimage?alt=media&#x26;token=f31dd577-ba27-4369-af8b-25ce9afcd1f9" alt="" data-size="line"> **Blue Button (leftmost):** Return, exit, or save settings.
* Gray Direction Buttons:
  * <img src="https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FR48KXgI2flteQ78PYH8a%2Fimage?alt=media&#x26;token=b5b4ab82-6f88-44c6-8b85-181c7bde6fe9" alt="" data-size="line"> **Left Gray:** Previous Page, decrease value, or select item
  * <img src="https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FVWLxHCjTZgj8Y3CXUn6X%2Fimage?alt=media&#x26;token=35556f59-f963-4b03-8db1-34f2953ddb58" alt="" data-size="line"> **Right Gray:** Next Page, increase value, or select item
* <img src="https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2F0lsHAW4cWIphk6mKtEoK%2Fbutton-orange.png?alt=media&#x26;token=9168c231-821c-4895-9194-0cf61b2fd06a" alt="" data-size="line"> **Orange Button (rightmost):** 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>

```
C03 Dosing Mode Setting Steps
• From the main screen (green backlight), 
press Orange Button (Setup) to enter settings (orange backlight).
• Use Gray Arrow Buttons to select C. Total , press Orange Button (Enter).
• Use Gray Arrow Buttons to select C03 Dosing Mode, press Orange Button (Enter).
• Use Gray Arrow Buttons to choose the options. 
• Press Orange Button (Set) to confirm.
• Press Blue Button (ESC) to return to the main screen (green backlight).
```

<figure><img src="https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2Fnhxeyn4AKZWLTbOkawOR%2Ffu-es-C03-en.png?alt=media&#x26;token=bf048c99-2c77-470c-b6f8-93e004197b0b" alt="" width="563"><figcaption></figcaption></figure>

**Dosing Operation Mode Screen**

<figure><img src="https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FQuifgW9VWqPqUjr4HRhx%2FFU-ES-Homepage-en-total.jpg?alt=media&#x26;token=efcbf728-5e83-4f6a-9272-0fcc00cb0d2a" alt="" width="563"><figcaption></figcaption></figure>

### C03 Options, RS485 Values, Read/Write Commands, and Formats

| Options       | Description | RS-485 Value |
| ------------- | ----------- | ------------ |
| OFF (Default) | -           | 0            |
| Count Up      | -           | 1            |
| Count Down    | -           | 2            |

> Refer to the [Read/Write Memory List](https://docs.lorric.com/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format.