Elecbee LCR-T4 Mega328 M328万用表晶体管测试仪多功能电容ESR表MOS PNP NPN LCR带测试线

1. One key measurement operation, auto power off delay. Shutdown current is only 20nA, support for battery operation.

2. Automatic detection PNP and NPN bipolar transistor, N, P-channel MOSFET, JFET FET, diodes, two diodes, thyristors, resistors, capacitors, inductors. Automatic detection pin definitions.

3. Measuring the current amplification factor (B) of the bipolar transistor and the turn-on voltage of the emitter junction (Uf). Darlington transistor amplification factor can be identified by the high threshold voltage and high current.

4. Can detect bipolar transistors and MOSFET's internal protection diodes and displayed on the screen.

5. 测量 MOSFET 的阈值电压和栅极电容。

6.支持两路电阻测量，可测量电位。 如果电位器调到它的末端，测试仪就无法区分引脚的中间和末端。

7.电阻测量分辨率为0.1欧姆，最大值50M欧姆测量。

8. 电容测量范围从 25pf 到 100mF (100000 UF)。 分辨率高达1 pF，电感量测范围0.01MH-20H，否则会显示为电阻，电感直流电阻高于欧2100也会显示为电阻。

9. It can detect 2UF above capacitor equivalent series resistance (ESR), a resolution of 0.01 ohms. This feature is very important for the detection of the capacitor performance.

10. 可显示两个二极管正向的符号，也可显示正向压降。

11. LED 检测二极管正向压降高于正常值。 双 LED 检测为双二极管。 同时检测到的发光二极管会闪烁。

12. 每次测试的时间约为两秒，仅大电容和电感量测需要较长时间。

短三测试方，进入测试，屏幕提示修正步骤。 当提示断开校准时间短结束时三关测试会继续进行，当提示在1-3脚接入100nF电容超时时，接入1uF电容校正后接入分配程序会自动进入下一步。 纠正结束，直到重新启动完成纠正。

Specifications:
The Main Parameters and Use:

1.使用ATmega8、ATmega168或ATmega328微控制器。

2. 2x16字符液晶显示结果。

3. one-button operation, automatic power off.

4.关机电流仅为20nA，支持电池供电。

5.低价版无晶振，自动断电。 1.05k版软件ATmega168或ATmega328在休眠模式下无测量时降低功耗。

6.自动检测PNP和NPN双极晶体管、N、P沟道MOSFET、JFET、二极管、双二极管、晶闸管可控硅。

7.自动检测管脚布局。

8.双极晶体管发射结的阈值电压和电流放大系数测量。

9. Darlington transistor through a high threshold voltage and high-current amplification factor identified.

10.双极晶体管、MOSFET保护二极管测试阈值电压值和MOSFET的栅极电容测量。

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 between the middle and the ends of the pin.

13. resistance measurement resolution is 0.1 ohms, the highest measured value 50M ohms.

14. can be detected and measured a capacitor. Maximum four numbers and units. Values can be from 25pf (8MHz clock, 50pF @ 1MHz clock) to 100mF. Resolution up to 1 pF (@ 8MHz clock).

15. may be larger than the value for 2UF capacitor equivalent series resistance (ESR) measured capacitance value. Resolution of 0.01 ohms and a two-digit numeric display. This feature requires at least 16K Flash ATMEGA (ATmega168 or ATmega328).

16.可以显示两个二极管的符号在正确的方向。 此外，还显示正向压降。

17. LED 检测二极管正向压降远高于正常值。 双 LED 检测为双二极管。

18.如果反向击穿电压小于4.5V，可以检测到稳压二极管18。 这会表现为两个二极管，只能由电压决定。 探头周围的二极管符号是一样的，在这种情况下，可以700mV的阈值电压接近真正的识别二极管的阳极！

19. If more than three diode type parts inspection, failure to establish the number of diodes 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 probes and start measuring again, one by one.

20. measures a single diode reverse capacitance values. Bipolar transistors also can measure, if you connect the base and collector or emitter.

21.需要找一个全桥接法测量。

22. 25pf capacitor values lower than are usually undetectable, but with a diode in parallel or at least 25pf capacitor in parallel. In this case, you have to subtract part shunt capacitance values.

23. 如果您有至少 16K ATMEGA 闪存，欧姆电阻器将测量小于 2100 的电感。 范围从0：01mH比20H，但精度不好。 测量结果仅显示单个连接元件。

24. test time is about two seconds, only the capacitance and inductance measurements will take longer.

25.software can be set to automatically turn off the power to measure the number of times before.

26.built-in self-test function with selectable clock frequency of 50Hz signal check the accuracy and wait for the call (ATmega168 and ATmega328).

27.可选电阻和零偏校准测量设备端口输出的自测能力（ATmega168和ATmega328）。 需要连接一个 100nF 到 20uF 的电容来补偿模拟比较器引脚 1 和 3 之间的偏移电压。 这样可以减少40uF以上电容的测量误差。 用相同的内部校准电容电压参考电压找到内部调整参考测量ADC增益。

如果测试电流超过保持电流，则可以检测到晶闸管和可控硅。 但有些电流高于半导体可控硅和可控硅测试仪可以提供触发电流。 可用测试电流仅为6mA左右！ 注意所有函数都只使用了单片机程序存储器作为更多的ATmega168。