The **HVS-3B-R** is an advanced Digital Micro Vickers Hardness Tester. Its electronic architecture is designed to integrate high-precision mechanical movement with digital analysis. Below is a breakdown of the key electronic components and systems found in this device. --- ### 1. Control & Processing Core The "brain" of the HVS-3B-R manages the loading cycle, dwell time, and data calculation. | Component | Function | | :--- | :--- | | **Main CPU / Microprocessor** | Processes the hardness formulas (Vickers) based on measured diagonals ($d_1, d_2$). | | **LCD Digital Display** | A back-lit interface that displays test parameters, hardness values, and statistics. | | **Keypad/Touch Interface** | Allows the operator to input dwell time (0-60s) and select test force. | ### 2. Force Application & Motorization Unlike manual testers, the "R" variant typically features automated turret and loading systems. * **Automatic Turret Control:** Electronic sensors and motors switch between the indenter and the objective lenses (40x and 10x) to ensure precise alignment. * **Step Motor:** Used to apply the load (ranging from 10g to 1kg or 3kg depending on specific sub-model) with high repeatability. * **Load Cell / Weights:** While some units use a dead-weight system, the electronic timing circuit controls the **solenoid** or motor that releases and lifts the weight. ### 3. Optical & Imaging Electronics The electronic imaging system is critical for reducing human error during the measurement phase. * **Encoder / Digital Eyepiece:** The eyepiece contains an electronic encoder. When the operator aligns the lines to the edges of the indentation, the encoder sends the distance data directly to the CPU. * **CCD/CMOS Interface:** The HVS-3B-R often features a port for a digital camera, allowing the image to be sent to a PC for automated software analysis. * **LED Illumination:** Uses a dimmable LED light source (controlled via a potentiometer or digital menu) for consistent brightness across samples. ### 4. Connectivity and Power | Part | Description | | :--- | :--- | | **RS-232 / USB Port** | Used for exporting data to a mini-printer or a computer for documentation. | | **Switching Power Supply** | Converts AC mains (110V/220V) to stable DC voltages required for the sensitive sensors. | | **Thermal Printer Interface** | Controls a built-in or external printer to output test reports instantly. | --- ### Technical Specifications Summary ```json { "Test_Force_Range": "0.098N to 29.4N (10g to 3kgf)", "Data_Output": "RS-232 / Integrated Printer", "Hardness_Value_Resolution": "0.1 HV", "Optical_Magnification": "100x (Observation), 400x (Measurement)" } ```