Product Description — Load Cell (2 kg) Calibration Dataset

2 kg Load Cell Calibration Dataset — HX711 Amplifier + Arduino Acquisition
(BF-350 Strain Gauge Wheatstone Bridge Load Cell)

This dataset contains the complete calibration results for a 2 kg load cell using the HX711 24-bit amplifier/ADC and an Arduino micro-controller. The calibration factor was derived from repeated controlled loading tests conducted during a university thesis project.

The load cell is based on BF-350 foil strain gauges, arranged in a full Wheatstone Bridge configuration, providing high sensitivity to deformation under load. The data totaling 64 different weight with 10 times measurements each done twice for the repeatability.

What’s Included

You receive a structured Excel dataset containing:

1. Raw HX711 Output Data

• Unconverted HX711 24-bit readings
• Multiple trials for each weight step
• Data captured from Arduino serial output
• Zero-load baseline noise data

2. Known Mass Reference Values

• Calibration weights from 50 g → 2 kg
• Incremental loading and unloading cycles
• Repeated trials to assess hysteresis, linearity, and repeatability

3. Derived Calibration Factors

• Calibration factor (counts per gram / grams per count)
• Linear regression equation for direct force conversion
• Error analysis, max deviation, standard deviation

4. Graph-Ready Tables

• Clean processed data for plotting
• Linearization curves
• Residual error curves
• Stability vs. time samples

5. Experiment Notes

• Load cell construction (BF-350 strain gauges)
• Wheatstone Bridge wiring configuration
• Conditioning with HX711 (GAIN=128)
• Stress application setup
• Observed drift, noise, and temperature considerations

Use Cases

This dataset is ideal for:

• Robotics and mechatronics load measurement
• Custom weighing scales
• Force measurement systems
• Research on low-cost load cells
• Validating or teaching calibration methodology
• Comparing different ADC gain settings
• Thesis or lab report reference data

Experiment Summary

Calibration was conducted using a stable rig with verified reference masses.
Each weight step includes:

• Multiple repeated readings
• Averaged values
• Noise distribution
• Regression-based calibration factor extraction

The dataset captures real-world behavior of a budget load cell + HX711 system—including drift, repeatability, and linearity—making it a valuable reference for engineering students, makers, and researchers.

File Format

• .xlsx file
• Sheets include: Raw Data, Processed Data, Regression, Graph Tables, Notes
• Compatible with Arduino, Python, MATLAB, LabVIEW workflows