GM328A Multi-Function Component Analyzer

SKU: FA1061-7
Power Supply

DC 6.8V – 12V (typically 9V 6F22 Battery)
Current Consumption

~30mA Operating / <20nA Standby
Resistor Range

0.01Ω – 50MΩ
Capacitance Range

25pF – 100mF (Resolution: 1pF)
Inductance Range

0.01mH – 20H
Frequency Counter

1Hz – 2MHz (above 25kHz resolution increases)
Voltage Measurement

0.01V – 50V DC
PWM Output

10-bit Pulse Width (1%-99% Duty Cycle)
Product Description
The GM328A is an advanced, multi-purpose diagnostic instrument that serves as the “Swiss Army Knife” for any electronics workbench. Built on a high-performance microcontroller platform, it is designed to automatically detect and measure a vast array of electronic components including transistors (NPN/PNP), MOSFETs, JFETs, diodes, resistors, capacitors, and inductors.
Beyond simple component testing, the GM328A includes secondary functions typically found in much more expensive benchtop equipment, such as a Frequency Counter (up to 2MHz), an Adjustable Square Wave Generator, and a PWM Pulse Signal Generator. With its large 160×128 color graphic display, it provides intuitive visual feedback, including component symbols and pin configurations. This tool is ideal for rapid prototyping, quality control, and the identification of unmarked or vintage components.
Key Features
  • Fully Automated Detection: Identifies component type, pinout, and key parameters (hFE, Vf, ESR, etc.) with a single button press.
  • Color Graphic Interface: 1.8-inch 160×128 high-definition display shows schematic symbols and detailed data.
  • Multi-Function Logic: Includes a built-in Frequency Meter, Square Wave Generator, and 10-bit PWM output.
  • Advanced Capacitor Analysis: Measures ESR (Equivalent Series Resistance) for capacitors >2µF, essential for troubleshooting power supplies.
  • Voltage Measurement: Dedicated DC voltage measurement port (up to 50V), useful for monitoring battery levels or circuit rails.
  • Rotary Encoder Control: User-friendly menu navigation for switching between tester and generator modes.
  • Rotatable Socket: Equipped with a professional ZIF (Zero Insertion Force) socket for quick testing and a dedicated SMD testing area.
Usage Instructions
  1. Power Setup: Connect a 9V battery or a stable 9V-12V DC adapter. Press the rotary encoder to power on.
  2. Basic Testing:
    • Insert the component leads into the ZIF socket (holes 1, 2, and 3).
    • Lock the lever and press the encoder.
    • The results will appear on the screen within seconds.
  3. Mode Selection: Long-press the rotary encoder to access the main menu. Rotate to select between:
    • Transistor/LCR Tester (Default)
    • Frequency Meter (Connect to “Freq” pins)
    • f-Generator (Square wave output)
    • 10-bit PWM (Pulse output)
    • Voltage Measurement (Use the “V” input port)
  4. Calibration: To ensure accuracy, perform a “Self-Test” via the menu. Short the three test points together when prompted.
  5. Safety: Always discharge capacitors before inserting them into the tester to prevent permanent damage to the microcontroller.
Q: Can this device identify "fake" transistors?

While it cannot perform a full stress test, the GM328A is excellent for identifying counterfeit parts by comparing the measured hFE (Gain) and Uf (Forward Voltage) against the manufacturer’s datasheet.

Q: What is the benefit of the "A" version (GM328A) over the standard GM328?

The GM328A typically features the color display upgrade and optimized firmware that includes the Frequency Counter and Square Wave generator as standard features.

Q: Is this suitable for business procurement for repair centers?

Yes. Its ability to measure ESR and identify MOSFET pinouts makes it highly valuable for industrial repair shops. For bulk orders, please contact our Commercial Sales Department.

Q: Does it include a case?

This depends on the specific listing. We offer both the “naked” PCB version for integration and the version with a clear acrylic protective shell. Please check your selection before checkout.

Q: Why does the device show "No, unknown, or damaged part"?

This occurs if: 1) The part is actually faulty. 2) The part is not a supported type (like a DIAC or some high-power SCRs). 3) The leads are not making proper contact with the ZIF socket.

Q: Can it be powered via USB?

The standard board requires 7-12V. If your specific unit does not have a 5V-to-9V step-up converter, do not connect it directly to 5V USB power as the measurement results will be inaccurate.

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