LCR-T1 multifunction tester ,can measure inductance + resistors + ESR + capacitance + Zener diode + SCR Features: 1 . Using ATmega8, ATmega168 or ATmega328 microcontroller. 2. 2x16 character LCD display results. 3 . One button operation , automatic power off. 4 . Shutdown current is only 20nA, support battery operation. 5. A low-cost version without the crystal , auto power off. 1.05k ATmega168 or ATmega328 version of the software when no measurement to reduce power consumption in sleep mode . 6. Automatic detection PNP and NPN bipolar transistor , N, P -channel MOSFET, JFET, diodes, dual diode , thyristor SCR. 7 . Automatic detection pin layout. 8. Current amplification factor of bipolar transistors and measuring the threshold voltage emitter junction . 9. Darlington transistor may be identified by the amplification factor of the high threshold voltage and high current . 10. For bipolar transistor , MOSFET protection diode testing. 11. And measuring the threshold voltage of the MOSFET gate capacitance . 12. Supports two resistance measurements and symbols show the highest four numbers and units. Both ends of the resistor symbol is shown connected to the tester probes number (1-3 ) . Therefore, the potential can also be measured . If the potentiometer is adjusted to its end , the tester can not distinguish the two ends of the pin and the middle . 13. Resistance measurement resolution is 0.1 ohm , the highest measured value 50M ohms. 14. Can be detected and measured with a capacitor . Maximum four digits and units. Value can be from 25pf (8MHz clock , 50pF @ 1MHz clock ) to 100mF. Resolution up to 1 pF (@ 8MHz clock ) . 15. For the above values can 2UF capacitor equivalent series resistance (ESR) capacitor value measurements. Resolution of 0.01 ohms and a two-digit numeric display . This feature requires at least 16K Flash ATMEGA (ATmega168 or ATmega328). 16. Two diodes can display symbols in the right direction . Further, the display forward voltage drop. 17. LED detection diode forward voltage drop is much higher than normal. Dual LED detected as double diodes. 18. Zener diode can be detected if the reverse breakdown voltage is less than 4.5V. This is displayed as two diodes , can only be determined by the voltage . Diode symbol is the same around the probe , in this case you can 700mV threshold voltage near real identification diode anode ! 19 If more than three diode -type parts detection, failure to establish the number of diode display another message . This will only happen if the diode is connected to all three probes and at least one diode . In this case , you should only connect the two measuring probe and start again , one by one. 20. Measuring a single diode reverse capacitance value. Bipolar transistors also can measure , if you connect the base and collector or emitter . 21. Only one measurement to find full-bridge connection . 22. Values less than 25pf capacitor typically undetectable , but a diode in parallel with 25pf capacitor or at least parallel. In this case , you must subtract the part of the parallel capacitance values. 23. Less than 2100 ohm resistor will measure inductance, if you have at least 16K ATMEGA flash . Range from 0:01 mH than 20H, but the accuracy is not good. Measurement results show only a single component connection. 24. Testing time is about two seconds , only capacitance and inductance measurements will take a long time . 25. Software can set the number of measurements before the power is automatically turned off . 26. Built-in self-test function with selectable clock frequency of 50Hz signal to check the accuracy and waits for a call (ATmega168 and ATmega328). 27. Optional internal resistance and zero offset calibration of measuring equipment self-test capability of the output port (ATmega168 and ATmega328). Need a 100nF to 20uF capacitor connected to the compensation between analog comparator pins 1 and 3 of the offset voltage. This can reduce the measurement error than 40uF capacitor . With the same internal calibration capacitor voltage reference voltage to adjust the reference measurements was found inside the ADC gain. If the test current exceeds the holding current , SCR and triac can be detected. But some current higher than the semiconductor SCR and triac tester can provide the trigger current . Available test current is only about 6mA! Note that all functions have only used single-chip program memory as more ATmega168. Package including 1 X New Transistor Tester without battery Payment We accept the payment via PayPal only. Payment is expected within 5 days of the auction's end. Availability of the item can not be guaranteed if no payment received in 3 days. Please don't purchase if you are not intend to pay. Unpaid item will report to eBay and get the warning. . Shipping & Handling 1.Items are shipped from china.we will send out within 2 working days after receive the money. 2.We usually send the parcel by Singapore Post Air Mail or HongKong Post Air Mail. After send out,most country will arrived the parcel in 12-25 business days. We also can provide Express,such as Fedex,DHL,EMS,usually 3-7days to most country.If you need Expedited shipping,contact us. The global shipping is difficult to control sometimes,if you havent receive after 25days,contact us,we will check for you. 3.We send to the address of ebay add info,please check your add info of ebay is correct. 4.Some conutries,such as Italy,Brazil,we can ship to,but it usually needs more than 30days to arrive,if you dont care the long time of shipping,contact us. Warranty and Return 1.If you are not satisfied when you receive your item, please return it within 14 days for a replacement or money back. Please contact us before you return it. 2.If item is defective in 14 days, We will send you a replacement without extra charger, or offer refund after we receive the defective item. 3.If item is defective after 14 days, you can still send it back to us. We will send you a new one after receiving the defective item. But you have to pay the extra shipping free. Feedback please leave behind your positive feedback for us after you receive the item, no matter whether you are satisfactory with my item, we will leave behind the same to you. If you want to leave a negative feedback,please contact me at first, we trust that everything could be issued before you leave it. Contact us We work 6 days except Sunday and public holidays. Please feel free to contact us anytime if you have any questions , We will try our best to help you.
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