Features:Turn on the power switch of the tester; the LCD does not light up, press the test button and the LCD will light up If testing devices with high capacitance, inductance and voltage drop, it is recommended to test the test interface of the tester. Try not to use the test line, so as not to cause a large error due to the resistance of the test line itself.The tester is not suitable for applications with high measurement accuracy Measurable components: various diodes, capacitors, resistors, triodes, thyristors, MOS tubes, etc. It is only used for measuring electronic devices, not for testing power devices (high power mos, thyristors, etc.) The instrument has been calibrated at the factory, the user does not need to calibrate by himself, it can be used directly Built-in 3.7V lithium battery 12864 graphic LCD display test results.One-touch operation, automatic power off, add power switch, avoid battery power consumption during storage and shutdown.Automatic detection of PNP and NPN bipolar transistors, N, P-channel MOSFETs, JFETs, diodes, dual diodes, thyristors, thyristors, resistors, capacitors, inductors. Automatically detect pin definitions It can measure the current amplification factor (B) of bipolar transistors, the threshold voltage (Uf) of low power Darlington crystals and emitter junctions.Bipolar transistors and protection diodes inside MOSFETs can be detected and displayed on the screen.Measure the threshold voltage and gate capacitance of the MOSFET.Support dual resistance measurement and potentiometer measurement. If the potentiometer is set to the end, the tester cannot distinguish between the middle and the end.The resolution of the test resistance is 0.1 and the maximum value is 50 M.Capacitance measurement ranges from 25pF to 100mF (100,000Uf) with 1 pF resolution. The equivalent series resistance (ESR) of capacitors above 2UF can be detected with a resolution of 0.01.The inductance measurement range is 0.01mH--20H, otherwise it will be displayed as resistance; DC resistance above 2100 ohms will also be displayed as resistance.Dual diodes can be tested for correct orientation and forward voltage drop.The LED detection is a diode, the dual LED detection is a dual diode, and the LED blinks during the test.Each test takes about 2 seconds, but measurements of large capacitances and inductances take a long time operate:1) After receiving the tester, turn on the power switch (the LCD of the tester does not light up), and press the test button (TEST button) to test the device. The test time will be extended or shortened depending on the equipment. If the device is recognized correctly, the screen will show the result and it will take about 15-20 seconds to turn off the screen. If the component is damaged or unrecognized, the display result will be off for about 3-5s, which will greatly improve the battery life when the battery is in use.2) Selection of test points: the test points of the tester are 1 (or T1), 2 (or T2), 3 (or T'3). Test points with the same number are the same.