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load cell ( 3 KG )

load cell ( 3 KG ) load cell ( 3 KG )
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Component Name

Load Cell (3 KG)

Overview

The Load Cell (3 KG) is a transducer that converts a weight or force into an electrical signal. It is a crucial component in various industrial, commercial, and consumer applications, including weight measurement, industrial automation, and IoT-based systems. This component is designed to accurately measure weights up to 3 kilograms with high precision and reliability.

Functionality

The Load Cell (3 KG) operates on the principle of strain gauge technology. When a weight is applied to the load cell, it causes a deformation in the metal body, which results in a change in the resistance of the strain gauges. This change in resistance is directly proportional to the applied weight. The load cell's internal circuitry converts the change in resistance into a proportional electrical signal, which is then output as a voltage or current signal.

Key Features

  • Weight Measurement Range: 0-3 kilograms
  • Accuracy: 0.1% of full scale (FS)
  • Sensitivity: 1.0-1.5 mV/V (millivolts per volt)
  • Output Signal: Analog voltage (0-5V or 0-10V) or current (4-20mA)
  • Operating Temperature: -20C to 60C
  • Material: Stainless steel or aluminum alloy
  • Dimensions: Varying shapes and sizes, typically rectangular or circular, with mounting holes for easy installation
  • Interface: Typically, 3-wire or 4-wire connections for power supply, signal output, and optional grounding
  • Protection: IP65 or higher rating for environmental protection against dust and moisture
  • Calibration: Optional calibration certificate available, which ensures the load cell's accuracy and precision

Applications

  • Industrial Automation: Weight measurement in production lines, inventory management, and quality control
  • Medical and Healthcare: Accurate weight measurement in medical devices, such as hospital scales and patient lifts
  • Retail and Commercial: Point-of-sale systems, weighing scales, and inventory management
  • IoT-based Systems: Integration with microcontrollers, single-board computers, or other IoT devices for remote monitoring and data analysis
  • Aerospace and Defense: High-precision weight measurement in aerospace and defense applications

Technical Specifications

| Parameter | Value | Unit |

| --- | --- | --- |

| Weight Measurement Range | 0-3 | kg |

| Accuracy | 0.1 | % FS |

| Sensitivity | 1.0-1.5 | mV/V |

| Output Signal | 0-5V or 0-10V | V |

| Operating Temperature | -20C to 60C | C |

| Material | Stainless steel or aluminum alloy | - |

| Dimensions | Varying | mm |

| Interface | 3-wire or 4-wire | - |

| Protection | IP65 or higher | - |

| Calibration | Optional | - |

Safety Precautions

  • Handle the load cell with care to avoid damage or deformation.
  • Ensure proper installation and mounting to prevent creep and hysteresis effects.
  • Avoid overloading the load cell beyond its specified weight range.
  • Use a regulated power supply to prevent electrical noise and interference.

By providing accurate and reliable weight measurements, the Load Cell (3 KG) is an essential component in various applications, including industrial automation, medical devices, retail, and IoT-based systems. Its compact size, high precision, and durability make it a popular choice for many industries.

Pin Configuration

  • Load Cell (3 KG) Documentation
  • Overview
  • The load cell (3 KG) is a transducer that converts a weight or force into an electrical signal. It is commonly used in weighing scales, industrial control systems, and other applications where accurate weight or force measurement is required.
  • Pinout
  • The load cell (3 KG) typically has a 4-wire or 6-wire configuration. The pinout for a 4-wire load cell is described below:
  • Pin 1: VCC (Red Wire)
  • Function: Power supply
  • Description: This pin supplies power to the load cell's internal circuitry.
  • Voltage: Typically 5V to 15V DC
  • Current: Depends on the load cell's specifications, usually in the range of 10mA to 50mA
  • Pin 2: GND (Black Wire)
  • Function: Ground
  • Description: This pin provides a grounding point for the load cell's internal circuitry.
  • Voltage: 0V (Ground)
  • Pin 3: S+ (White Wire)
  • Function: Signal+
  • Description: This pin outputs a positive signal proportional to the weight or force applied to the load cell.
  • Signal: Analog voltage signal, usually in the range of 0V to 5V
  • Impedance: Typically low impedance, around 100 to 500
  • Pin 4: S- (Green Wire)
  • Function: Signal-
  • Description: This pin outputs a negative signal proportional to the weight or force applied to the load cell.
  • Signal: Analog voltage signal, usually in the range of 0V to 5V
  • Impedance: Typically low impedance, around 100 to 500
  • Connection Structure
  • To connect the load cell (3 KG) to a microcontroller or other devices, follow these steps:
  • 1. Power Supply:
  • Connect Pin 1 (VCC) to a power supply (5V to 15V DC) through a suitable current-limiting resistor (depending on the load cell's specifications).
  • Connect Pin 2 (GND) to the power supply's ground or a common ground point.
  • 2. Signal Conditioning:
  • Connect Pin 3 (S+) to a non-inverting input of an instrumentation amplifier or an operational amplifier.
  • Connect Pin 4 (S-) to an inverting input of the amplifier.
  • The amplified signal can then be connected to an analog-to-digital converter (ADC) or a microcontroller's analog input.
  • 3. Noise Reduction:
  • Add a noise-reducing capacitor (e.g., 100nF to 1F) between Pin 3 (S+) and Pin 4 (S-) to filter out high-frequency noise.
  • Add a pull-down resistor (e.g., 1k to 10k) between Pin 4 (S-) and the power supply's ground to prevent signal drift.
  • Important Notes
  • Ensure the power supply's voltage and current meet the load cell's specifications to avoid damaging the device.
  • Use shielded cables and keep the signal wires away from noise sources (e.g., motors, relays) to minimize electromagnetic interference (EMI).
  • Implement proper signal conditioning and noise reduction techniques to achieve accurate weight or force measurements.
  • Remember to consult the load cell's datasheet for specific pinout, voltage, and current requirements, as these may vary depending on the manufacturer and model.

Code Examples

Load Cell (3 KG) Documentation
Overview
The load cell (3 KG) is a transducer that converts a weight or force into an electrical signal. It is commonly used in industrial and commercial applications such as weigh scales, cranes, and process control systems. This documentation provides an overview of the load cell (3 KG) component and demonstrates its use in various contexts through code examples.
Technical Specifications
Capacity: 3 KG
 Output: Analog voltage signal (0-5V) proportional to the applied weight
 Accuracy: 1% of full scale
 Repeatability: 0.5% of full scale
 Excitation: 5V DC (recommended)
 Operating Temperature: -10C to 40C
 Connector: 6-pin SMA female connector
Code Examples
### Example 1: Arduino-Based Weighing Scale
In this example, we will use the load cell (3 KG) to create a simple weighing scale using an Arduino board.
Hardware Requirements
Load cell (3 KG)
 Arduino Uno or compatible board
 HX711 24-bit Analog-to-Digital Converter (ADC)
 Breadboard and jumper wires
Software Requirements
Arduino IDE (version 1.8.x or higher)
Code
```c++
#include <HX711.h>
#define LOADCELL_DOUT_PIN  3
#define LOADCELL_SCK_PIN  2
HX711 scale;
void setup() {
  Serial.begin(9600);
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_gain(128); // Adjust gain to 128 for 5V excitation
  scale.tare(); // Reset scale to zero
}
void loop() {
  float weight = scale.get_units(10); // Get weight in grams (10 readings averaged)
  Serial.print("Weight: ");
  Serial.print(weight, 2);
  Serial.println(" g");
  delay(1000);
}
```
Output
The code will output the weight in grams to the serial console, updated every second.
### Example 2: Raspberry Pi-Based Industrial Automation
In this example, we will use the load cell (3 KG) to create an industrial automation system using a Raspberry Pi and Python.
Hardware Requirements
Load cell (3 KG)
 Raspberry Pi 4 or compatible board
 ADS1115 16-bit ADC module
 Breadboard and jumper wires
Software Requirements
Raspberry Pi OS (version 10 or higher)
 Python 3.x (version 3.7 or higher)
Code
```python
import time
import ADS1115
# Initialize ADC module
adc = ADS1115.ADS1115()
# Set up load cell channel
channel = adc.channel('AIN0')
while True:
    # Read load cell voltage
    voltage = adc.read_voltage(channel)
    
    # Convert voltage to weight (using a calibration factor)
    weight = voltage  3.0 / 5.0  # Assuming 3 KG capacity and 5V full scale
    
    print(f"Weight: {weight:.2f} KG")
    time.sleep(1)
```
Output
The code will output the weight in kilograms to the console, updated every second.
Note: The calibration factor in the Python code is hypothetical and may need to be adjusted based on the specific load cell and application. It is essential to perform thorough calibration and testing before deploying the system in a production environment.