The **TCS-30-R/Q** series refers to high-precision electronic platform scales (often used for commercial or industrial weighing). The "R" and "Q" suffixes typically denote specific display configurations—such as Red LED (R) or Liquid Crystal Display (Q)—or specific structural builds. Below is an explanation of the core electronic components that make up these systems. --- ### 1. Key Electronic Components | Component | Function | Technical Detail | | :--- | :--- | :--- | | **Load Cell** | The primary sensor. | Converts mechanical force (weight) into an analog electrical signal (mV). Usually made of aluminum alloy. | | **A/D Converter** | Analog-to-Digital conversion. | Translates the small voltage from the load cell into digital data for the processor. | | **Mainboard (PCB)** | The "Brain" of the scale. | Contains the CPU/Microcontroller that processes calibration data and weight calculations. | | **Display Unit** | Visual interface. | **R:** High-brightness Red LED (better for dark areas).
**Q:** LCD with backlight (lower power consumption). | | **Rechargeable Battery** | Portable power source. | Typically a 4V or 6V Lead-Acid battery for cordless operation. | --- ### 2. Functional Circuitry The internal electronics are divided into several functional blocks: 1. **Power Management Circuit:** * Includes a transformer or switching power supply (AC to DC). * Charging circuit for the internal battery. * Voltage regulators (typically 5V) to ensure stable power to the sensors. 2. **Signal Conditioning Block:** * Filters out electronic noise from the load cell signal. * Amplifies the signal so the A/D converter can read it accurately. 3. **Input Interface:** * A 20-key or 24-key matrix keyboard used for "Tare," "Zero," and "Unit Price" entry. --- ### 3. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Capacity** | 30 kg | | **Precision Class** | OIML III | | **Excitation Voltage** | 5V DC | | **Communication** | Optional RS232 (in some models) for PC/Printer connection | | **Operating Temp** | -10°C to +40°C | --- ### 4. Common Maintenance Points * **Calibration Memory:** Uses an EEPROM chip to store calibration constants. If the scale shows "Err," it often indicates a memory or sensor fault. * **Low Battery Indicator:** The PCB monitors the battery voltage and triggers a "LOBAT" warning on the display when the voltage drops below a specific threshold (e.g., 3.4V for a 4V system).