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Not all Elebia hook models come with a load cell; this feature can be configured using the configurator [here]. If you purchased a hook without a load cell, don’t worry! A qualified technician from Elebia or an authorized distributor can install one later.

All load cells are factory calibrated, which means they should function accurately under normal circumstances. However, calibration may be necessary if you encounter specific situations, such as replacing the hook's PCB or if the load cell has been deformed, leading to inaccurate weight readings.

Understanding Load Cell Parameters in eMAX

To effectively calibrate the load cell using the eMAX controller, it's crucial to understand several key parameters. You can navigate the eMAX menus by referring to our detailed guide [here]. The parameters affecting load cell calibration are stored in the hook electronics, while other settings, like resolution and alarms, are saved in the eMAX memory. To access the necessary parameters for calibration, go to the hook parameters menu within the SCALE submenu. An article referring to these parameters can be found [here] 

SCALE Submenu

The SCALE menu contains several vital parameters:

- ZERO: This function performs a tare operation, eliminating the hook's weight from the measurement to ensure accuracy.

- AUTOZERO: This feature automatically performs a tare before each operation, which can be enabled or disabled based on your preference.

- SPAN: This factory-calibrated parameter defines the calibration factor of the load cell sensor.

- INITIAL ZERO: This option allows you to restore the factory default zero value.

- FULL SCALE: This parameter indicates the maximum measurable weight corresponding to the hook’s Working Load Limit (WLL).

Understanding these parameters is crucial, as they directly impact the weight displayed on the eMAX.

Load Cell Calibration Procedure

The most critical parameter for calibration is SPAN. This value is documented internally by Elebia and can be provided upon request. You can also find the SPAN value on the load cell label, which includes the load cell model, serial number, and SPAN value—information that is particularly useful if a replacement is needed.

Calibrating Using the SPAN Value

To calibrate the load cell:

1. Locate the SPAN value on the load cell label (expressed as x,xxxx mV/V) or request it through our helpdesk by providing your hook's serial number. [here]

2. Enter this value into the SPAN parameter field in the SCALE menu.

Obtaining SPAN Using GET SPAN

Alternatively, you can use the GET SPAN function to obtain the SPAN value, though this method is less accurate. Here’s how:

1. Hang a known load that is approximately 80% of the hook’s maximum capacity (FULL SCALE).

2. Enter the exact weight into the eMAX.

3. The system will then return a theoretical SPAN value for the load cell.

By following these steps, you can ensure your load cell is accurately calibrated, providing reliable performance for your Elebia hook. If you have any questions or need further assistance, please don’t hesitate to reach out to our customer support team!