Handheld VI Curve Tester 2 Channel ASA Circuit Board Online Repairs Tester 4-Internal Resistance 4-Frequency Adjustable with 1.3inch OLED Display

features a 1.3inch OLED display, support 4-gear internal resistance adjustable and 4 test frequency adjustable. Multifunctional design, support curve movement, scan function, true dual channel, simultaneous display, and program control. Wide applications, suitable for various types of devices the circuit is composed of, digital, analogue, digital analogue mixed, functional known, unknown (such as dedicated, programmable), etc.
Features:
With 1.3 inch OLED display, you can see the data clearly, more convenient to use.
Support 4-gear internal resistance adjustable(56R, 470R, 1.5K, 20K), and 4 test frequency adjustable (50Hz, 300Hz, 2KHz, 13KHz).
Multifunctional design, support curve movement, true dual channel, simultaneous display, and program control.
Powered by built-in 3000mAh battery, with long endurance and long service lifespan.
Wide applications, suitable for various types of devices the circuit is composed of, digital, analogue, digital analogue mixed, functional known, unknown (such as dedicated, programmable), etc.
Description:
1. VI curve analysis, also known as ASA, does not involve the circuit principle and does not require the circuit to be in the operating state, so it can be used for fault detection of circuit boards that are disconnected from equipment (without online detection) without drawing data; It is forbidden to perform electrification and measure the undischarged capacitance. Since the circuit board does not need to be powered, the circuit board is relatively safer. It does not involve the functions of the devices on the circuit board, so no matter what kind of devices the circuit is composed of, digital, analogue, digital-analogue mixed, functionally known, unknown (such as dedicated, programmable), etc., can be tested; It is tested by circuit node (device pin), and is basically not limited by the packaging of the component on the circuit board. Since a single device can be regarded as the simplest circuit board, the ASA technology can also be used to detect the quality of large, complex, or unknown integrated devices. In fact, due to limited conditions, ASA is the only way for users to detect such devices. In addition, ASA is convenient and intuitive when it is used to detect the function of discrete component.
2. VI and multimeter resistance method type, but the multimeter resistance voltage is low, and this instrument uses an AC signal to excite circuit nodes. Because the amplitude and frequency are adjustable, the amplitude close to the working voltage can be used to excite, and the measured curve is more real. The fault node can be found by comparison. Due to the limited current applied to the component, this technology will not affect or damage any component. ASA has a lot of advantages, and it has proved to be a fast and effective fault diagnosis technology.