VI curve analysis, also known as ASA, does not involve circuit principles and does not require the circuit to be in working condition. Therefore, it can be used for fault detection of circuit boards separated from equipment (without online detection) and does not require data plotting; Name: Shunmaii : CN() Certification: None Description: 1. The resistance method of VI and multimeter is the same, but the resistance voltage of multimeter is lower, while this instrument uses AC signal to excite circuit nodes. Due to the adjustable amplitude and frequency, excitation can be performed with amplitudes close to the operating voltage, resulting in more realistic measurements. By comparison, the faulty node can be identified. Due to the limited current applied to the components, this technology not affect or damage any components. ASA has many advantages and has been proven to be a fast and effective fault diagnosis technique. Features: 1. 1.3-inch OLED display screen 2. Built in battery, 3000mAh 3. Working voltage: 4V 4. 4 . Test frequency: 50Hz, 300Hz, 2kHz, 13kHz 5. Adjustable internal resistance in 4 levels: 56R, 470R, 1.5K, 20K 6. Curve movement: Yes 7. True dual channel: Yes 8. Simultaneously display: Yes 9. Program control: Yes 10. Host size: 14.5 * 8.2 * 4cm 11. Host weight: 218 grams Attention: Please discharge before measuring, otherwise the instrument may be . Color: As Shown Material: plastic Package Contents: 1 * VI curve tester 2 BNC cables 2 test leads 1 cord Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.