What is FCT test?

I. FCT basic introduction

FCT (Functional Circuit Test) is a dynamic function tester for circuit boards, which treats the unit under test on the board as a functional body, provides an input signal to it, and detects the signal according to the design requirements of the functional body. With advanced and flexible solutions, the degree of automation of testing is improved. And greatly reduce the fault finding time, is the best way to quickly repair and find the fault.
This equipment, with the industrial control computer as the control core, integrates a standard GPIB interface, multi-channel programmable waveform generator, channels of programmable I/O and data acquisition modules, which can maximize the user's data acquisition and testing of analog/digital signals of various circuits to be tested, and qualitative or quantitative analysis through the system software. In addition, through the GBIB interface, any equipment that conforms to the GPIB interface standard can be connected to the system, which provides unlimited expandable space in terms of function, coupled with a flexible and simple human-machine interface, greatly facilitating the use of the user.

II.The types of FCT are

1. According to the control mode.
Can be divided into manual control function test, semi-automatic control function test, fully automatic control function test
2. According to the type of controller
Can be divided into MCU control mode, CPU control mode, PC control mode, PLC control mode, etc.

III. The common benefits of using FCT are

The advantage of using functional test fixtures is that even if the workers are not very skilled in the same product, they can quickly produce a large number of good products with few defects and low variability by using the fixtures. However, for the production mode of various small quantities, the result of making many fixtures will cause the disadvantage of higher production cost.

IV. The function of PCBA measurement is broadly divided into the following parts.

1. System control center.
This part is generally PC, MCU, ARM and other small or medium-sized central processor composition, its main role is to control the entire test process process, and the test content of each step to judge and record, and ultimately the test results. It is the core brain of the whole test system.
2. Control and execution part.
The control execution part is mainly composed of I/O components, which is the induction and execution mechanism of the logical action of the test process. Through it, the system builds various test environments and realizes test functions.
3. Parameter measurement part.
The measurement part is mainly composed of some boards and instruments for measurement. It can mainly complete the acquisition of various analog or digital quantities in the test process. So sometimes we also call it the data acquisition part.
4. Data processing and output part.
Each step and the final test results are the purpose of our whole test. How to store and output these results and data, more convenient for us to effectively control the quality of PCBA products, this is the responsibility of the data processing and output section.