LCR-T4 Motherboard Tester Instructions Features: ① Atmega328 chip, more powerful; ② 12864LCD graphics display, intuitive and large information content; ③ 6F22 type 9v battery-powered,easy to get and cheaper; ④ Activities of IC Block, easy to test; ⑤ LCD backlight, dark environment can also be tested; ⑥ Automatically identify the pin sequence, fool type test; ⑦ Key components is high precision,ensuring test accuracy; ⑧ Standby current is only 20na,long standby; ⑨ Support the late automatic calibration to ensure the accuracy of the instrument; ⑩ Single button operation, quick and effort. The tester is stable and can read the accurate data automatically.It is also easy to use, suitable for electronic enthusiasts, electronic developers, designers, and electronic maintenance which is a necessary small instruments. It can measure a variety of resistors, capacitors, inductors, diodes, transistors, SCR, MOS FET;determining the device type, pin polarity, output HFE, valve voltage, FET junction capacitance.It is particularly suitable for transistor pairing and hybrid surface-mount components to identify, it is the best partner of amateur DIYer. Description: Display: Digital 12864 LCD Backlight color: green (default) or white backlight (customized) Temperature: Operation: 0 ~ 40 ℃, storage: -30 ~ 60 ℃ Working altitude: 0 to 2000 meters Relative humidity: non-condensing <10 ° C Battery type: 6F22 type 9v Size: (width x length) = 71 * 63 Weight: 48 grams Operating power: DV = 9V Standby current: 0.02uA Operating current: Typical operating current 40mA Test ranges: Inductors, capacitors , diodes, dual diode , mos, transistor, SCR , the regulator, LED tube , ESR, Resistance,Adjustable potentiometer Resistance :0.1 ohm resolution, maximum 50M ohm Capacitor :25pf -100,000 uf Inductors : 0.01mh-20H NEW Function: 1:Automatic detection of NPN and PNP transistors, n-channel and p-channel MOSFET, diode (including double diode), thyristor, transistor, resistor and capacitor and other components 2: Automatic test the pin of a component, and display on the LCD 3:Can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage 4: Measure the gate and gate capacitance of the MOSFET threshold voltage 5:Use 12864 liquid crystal display with green backlight Specifications: For you reference 1,One -button operation, automatic shutdown . 2,Only 20nA shutdown current. 3,Automatically detect NPN, PNP bipolar transistors , N -channel and P -channel MOS FET, JFET , diodes , two diodes, thyristors small power unidirectional and bidirectional thyristor. 4,Automatic identification components pin arrangement . 5,Measuring bipolar transistor current amplification factor and base - emitter threshold voltage. 6,Via the base - emitter threshold voltage and high current amplification factor to identify Darlington transistors. 7,Can detect bipolar transistors and MOS transistors protection diodes. 8,Measuring the gate MOS FET threshold voltage and the gate capacitance. 9,Can simultaneously measure two resistors and resistor symbol is displayed. Displayed on the right with a decimal value of 4 . Resistance symbol on both sides shows the pin number. So you can measure the potentiometer. If the potentiometer wiper is not transferred to an extreme position , we can distinguish the middle and both ends of the pin. 10,Resistance measurement resolution is 0.1 ohms , 50M ohms can be measured . 11,Can measure capacitanceCan measure capacitance of 30pF-100mF , resolution 1pF. 12.2uF more capacitors can simultaneously measure the equivalent series resistance ESR values. The two can be displayed with a decimal value , resolution 0.01 ohms. 13,Can be in the correct order and the diode symbol display two diodes , and gives the diode forward voltage. 14.LED is detected as a diode forward voltage higher . Combo of the LED is identified as two diodes. 15,Eeverse breakdown voltage is less than 4.5V Zener diode can be identified. 16,Can measure a single diode reverse capacitance. If the bipolar transistor connected to the base and collector or emitter of a pin , it can measure the collector or emitter junction reverse capacitance . 17. The reverse direction capacitance value of a single diode can be measured. Bipolar transistors can also be measured,but it must be simultaneously connected to the base and the collector or Emitter. 19. Capacitance test up to 1000000uf, the best test range is 0.2nF ~ 7000uF, if the test value is lower than 25pf capacitor,you can connect a diode in parallel or at least 25pf capacitor in parallel. After measuring the result, subtract the capacitance of the known parallel capacitor. 20. Inductance test range: 0.01mH ~ 20H,if it is more than 20H, or less than 2100 ohm, the resistance will be identified as inductance, the measurement results show only a single inductance, and display inductance. 21. The test time is about two seconds, large capacity capacitance and inductance measurement time will be extended with the actual value of the time. 22. Automatically shutdown,the test results show about 3 seconds after the test, and then shut down. Instructions: Firstly, insert the device under test into the instrument, and then click the start test button, the instrument automatically test and display the test results; Test port has a label, test two pins of the device, you can choose a different number of feet with free match, such as 1-2, 1-3, 2-3,If the device has polarity, the meter will automatically show the polarity; Test the three pins of the device, the device's three pins and the instrument 1, 2, 3 test port are one by one correspondence, the arrangement can be, such as 1-2-3, 2-3-1, 3-2-1 and so on Instrument calibration: 1. When shutting down, connect the three test ports with wires 2. Press the test key to start, show self test mode, The second line shows the question mark, press the test button, the calibration starts automatically 3. Screen display changes constantly, when it displays: T4 isolate Probe ", disconnect the three test port of the short wiring, calibration continues 4. When 1-II-3> 100nf is displayed, a non-polar capacitor of 100nf or more is connected between test ports 1 and 3, and calibration is continued until the end. Precautions: 1.It can be fully automatically identificate and measure transistors, FET, IGBT, diode, double diodes, resistors, double resistance, capacitance, inductance, chip capacitors, capacitance ESR (non-online measurement) and other functions. 2.This instrument providing a test current is about 7ma, if it is lower than this sustaining current, some large and oversized in the field test tube (JFET), the thyristor and Traics appear to be tested for error or error.When it is below current (7 mA at test current) to maintain current, MOSFETs and transistors can be identified, but in most cases the test is always accurate. 3. Resistance measurement range is about 2 ohms to 50M ohms, covering most of the resistance value, the accuracy is not high and can be qualitative but not quantitative. 4. Capacitor measurement is about: 0.2nF to 7000μF as well, the accuracy of the test to 4000μF or more slowly deteriorated. In principle, large capacitance measurements take a long time, sometimes measuring time 1 minute is normal. 5. Discharge the capacitor before measuring to prevent damage to the tester with high pressure. 6. In order to ensure the accuracy of the test results, the instrument added to the boot detection voltage, when prompted voltage is low, please replace the battery! 7. If you feel the handwriting is unclear,please adjust the LCD contrast, press and hold the key to turn off, enter the contrast adjustment interface, click the button ,adjust to satisfaction, and then wait for a reboot. 8. If you feel that the instrument test values are biased, please refer to the adjustment steps to adjust, debug all devices to be prepared. Thank you for choosing this tester,if you have any problems please feel free to contact us.