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In the world of electronics, precise measurements are crucial for accurate readings and reliable data. One instrument that is commonly used for precise measurements is the 3 wire load cell HX711. This article will guide you on how to calibrate and use a 3 wire load cell HX711 for precise measurements.
What is a 3 wire load cell HX711?
A 3 wire load cell HX711 is a type of electronic measuring device that is used to convert a physical force into an electrical signal. This signal is then processed by a microcontroller or a computer to provide precise measurements of the force applied to the load cell.
Calibrating the 3 wire load cell HX711
Before using the 3 wire load cell HX711 for measurements, it is essential to calibrate the device to ensure accurate readings. To calibrate the load cell, follow these steps:
1. First, connect the load cell to the HX711 module. The load cell will have three wires: red, black, and white. Connect the red wire to the E+ pin, the black wire to the E- pin, and the white wire to the A+ pin on the HX711 module.
2. Power up the HX711 module using a 5V power supply. Make sure to measure the output voltage at the output pins to ensure that the load cell is correctly connected.
3. Install a weight of known value on the load cell. For example, you can use a 1 kg weight. Measure the voltage output of the load cell at this weight and note down the value.
4. Using a library or code for the HX711 module, calibrate the load cell by setting the ratio of the voltage output to the weight applied. This can be done by performing a simple calculation using the known weight and the measured voltage output.
Using the 3 wire load cell HX711 for precise measurements
Once the load cell is calibrated, you can use it for precise measurements. Follow these steps to use the 3 wire load cell HX711 for accurate readings:
1. Connect the load cell to the HX711 module as described earlier.
2. Power up the HX711 module using a 5V power supply.
3. Apply the force or weight that you want to measure on the load cell.
4. Use the library or code for the HX711 module to read the voltage output of the load cell and convert it into a weight measurement using the calibration ratio.
5. Record the weight measurement for your data analysis or further processing.
In conclusion, calibrating and using a 3 wire load cell HX711 for precise measurements is essential for accurate readings and reliable data. By following the steps outlined in this article, you can ensure that your measurements are accurate and consistent, making your electronic projects more reliable and efficient.
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