Enhanced Universal Functional Test System (EF01 Embedded FCT)

 

Enhanced Universal Functional Testing System

(EF01 Embedded FCT)

 

1. Equipment Images

II. Brief Function Description

 

The enhanced general-purpose functional test system hardware (standard model) is centered around a single main control board, which features an STM32 chip. This board is responsible for storing test files, reading them, executing tests according to the file-defined procedures, and managing peripheral I/O control. It also handles measurements such as voltage, resistance, current, and frequency—and can even forward control commands to other boards. The board can be used either in conjunction with other boards or independently. Additionally, it can be connected to host computer software for operation, or it can function entirely standalone without relying on external software.

 

Test Mode: This system features two distinct test modes. The first mode involves the host computer software controlling the testing process. Specifically, the host computer software reads the test steps and sequentially sends instructions to the main control board based on these steps. The main control board then executes the tests according to the received commands. Once the testing is complete, it uploads the results back to the host computer software, which displays the outcomes and verifies whether the test results are accurate. At the end of the test, the main control board can trigger an audible and visual alarm via its IO output.

The second mode involves the host computer software uploading the created test file to the microcontroller on the main control board. The host computer then either sends offline test commands or allows the user to initiate testing by pressing the test button on the main control board. Once started, the microcontroller executes the predefined test sequence and uploads the test results back to the host computer software for display. At the end of the test, the main control board can activate an audible and visual alarm via its IO output.

 

 

3. Equipment Features

 

1. The main control board and all functional modules are equipped with the STM32F103RCT6 chip, ensuring fast operation and stable testing performance.

2. The board card is compact in size (142*226) and can be placed directly inside the needle bed or fixture.

3. It features a Pad as the display screen, offering a large viewing area and simple operation. Powered by the Windows system, it aligns with the familiar operating habits of most users while also enabling full compatibility with all Windows-based functions—making it incredibly powerful. The host computer software runs seamlessly on Windows, allowing for convenient modification and expansion of its functionality.

4. It can be used both as an embedded solution and as a wired system, allowing you to choose the mode that best suits your specific application needs.

5. The embedded system can store five different test files, allowing the embedded board to correspond to various testing fixtures.

6. Supports external serial-port instrumentation devices, allowing you to control other instruments via the serial port for collaborative testing, making system expansion convenient.

7. Separation of programming and testing interfaces: The programming interface allows users to create test files, while the testing interface handles the actual testing process. This setup prevents unauthorized modifications to the test program, ensuring data remains secure and reliable. Additionally, once the test data is downloaded into the EPROM, it can only be accessed by the host computer for updates—further enhancing data security.

8. Utilizes a table-based programming interface (similar to the inspection process document format used on-site), making it easy to create test steps and allowing users to freely adjust the sequence of test steps, as well as flexibly combine test timing and logical relationships.

9. Universal Design: During both software and hardware design, we’ve carefully considered versatility. As long as the performance specifications of the hardware configured in the tester fall within the required range, customers can easily swap out different products under test—simply by replacing the corresponding test fixtures and loading the appropriate test files—and then proceed with testing without any hassle.

10. It features automatic full-function testing and manual single-step test selection capabilities, as well as step-by-step loop testing, making it easy for customer engineers to debug the board under test.

11. When a specified defect in the circuit board under test—such as a power short circuit—occurs, the system automatically stops the test to protect both the board being tested and the testing system, preventing the fault from escalating.

12. During debugging, you can operate the Pad either via the touchscreen or by connecting a USB keyboard and mouse through a USB HUB, making it convenient for both debugging and data modification.

 

4. Technical Specifications

1. Main Control Board Technical Specifications

1) Channel Count: 8 channels, with optional 2-channel switching; resistance and voltage measurements share a common analog bus.

2) DC Characteristics:

A. Input impedance: 10 MΩ

Input protection: 600V.

B. Voltage Range:

DC Voltage: Standard: -200 to +200V

-0.5 to +0.5V, accuracy 3%; -200 to -0.5V and 0.5 to 200V, accuracy 1%

Optional: -400~+400V

-0.5 to +0.5V, accuracy 3%; -400 to -0.5V and 0.5 to 400V, accuracy 1%

Direct Current:

1 µA to 30 µA, with 5% accuracy

30 µA to 1 mA, with an accuracy of 3%

1mA to 30mA, Accuracy: 3%

30mA to 1A, with an accuracy of 3%

3) Communication Characteristics:

A. Input impedance: 1 MΩ

Input protection: 380V

B. AC voltage RMS: 0–220V, frequency 5Hz–1kHz, accuracy 3%

Effective value of alternating current:

1 µA ~ 30 µA, Accuracy 5%

30 µA to 1 mA, with 3% accuracy

1mA–30mA, Accuracy 3%

30mA to 1A, with 3% accuracy

4) Frequency Acquisition

A. Frequency Range:

2Hz–10kHz, voltage range 0–220V, with an accuracy of 1‰

10 kHz to 4 MHz, voltage range 0–30 V, with an accuracy of 1‰

5) Resistance Measurement (Constant Voltage Measurement)

1Ω to 1MΩ, accuracy of 3%

1 MΩ ~ 10 MΩ, Accuracy 5%

Over 10 MΩ, Accuracy: 10%

2. Technical Specifications for the Channel Switching Board

1) Channel Count: 24 channels, which can be used either as channel expansion for the main control board or as standalone acquisition channels.

2) Voltage Acquisition

A. Voltage Range:

Standard configuration: -200 to +200V

-0.5 to +0.5 V, accuracy 3%; -200 to -0.5 V and 0.5 to 200 V, accuracy 1%.

Optional: -400~+400V

-0.5 to +0.5V, accuracy 3%; -400 to -0.5V and 0.5 to 400V, accuracy 1%

3) Frequency Acquisition

A. Frequency range: 2 Hz to 1 kHz, with an accuracy of 0.1%

3. Technical Specifications for the Programmable Power Supply Board

1) Channels: 2 channels, capable of outputting either constant current or constant voltage

2) Voltage range: 1.5–28V, with a step size of 0.01V and an accuracy of 1%.

Standard features: Internal power supply; when using the internal power source, the maximum output voltage is 1V lower than the supply voltage of the programmable power board.

Optional feature: External power supply; when using an external power source, the output voltage ranges from 1.5V to 28V.

3) Current range: Constant current from 100mA to 1.5A, with an accuracy of 1% + 1mA; the current limit can be set manually.

4. Technical Specifications for Positive and Negative Control Input/Output Board

1) Channels: 16-channel output with positive and negative terminal voltages (every 8 channels form a group)

16-channel digital input signals (high-level compatible with 1.8–30V voltage, low-level below 0.5V).

2) Voltage and Current: Input current limit up to 30V, with a maximum of 10mA.

Output current limiting up to 30V (determined by the supply voltage), with a current limit of 350mA.

5. Technical Specifications for the Digital Output Board

1) Channels: 24

2) Rated current: 2A

3) Withstand Voltage: 200V

 

5. Target Customer Base

1. This service is available for manufacturers and processors of tooling fixtures. When accepting orders, some customers may have simple functional testing requirements—these can be met by selling them board cards.

2. Compare smaller PCB manufacturers that produce relatively high volumes. Smaller PCB manufacturers typically handle boards with simpler functionality tests, while those producing higher volumes often require more advanced functional testing equipment—and thus have higher price expectations. As a result, these types of customers can benefit from purchasing multiple units at lower prices.

3. No high voltage or high-power supply is required; aside from serial communication, there are no other types of communication interfaces. It can test voltage, current, resistance, and frequency. Most circuit boards of this type are suitable for testing. If communication testing is needed, the board can be easily expanded to include communication test functionality.