SPECIFICATIONS

Brand Name: TWO TREES

Capacitance Esr Meter: Tester Lcr

Choice: yes

Condition: New

Hign-concerned Chemical: None

Origin: Mainland China

Transistor Tester: Lcr T4

Type: Module

semi_Choice: yes

LCR-T4 graphical multi-function tester resistor + capacitor + diode + thyristor + inductor + transistor + mos tube

1. Features ATmega8, ATmega168 or ATmega328 microcontrollers.

2. 2x16 character LCD display shows the results.

3. One-click operation to automatically turn off the power.

4. The shutdown current is only 20nA, supporting battery operation.

5. The low-cost version does not use a crystal oscillator and supports automatic power off. The ATmega168 or ATmega328 of version 1.05k software uses sleep mode to reduce power consumption when not measuring.

6. Automatically detect PNP and NPN bipolar transistors, N and P channel MOSFETs, JFETs, diodes, dual diodes, thyristors and thyristors.

7. Automatic detection of pin layout.

8. Measure the current amplification factor of the bipolar transistor and the threshold voltage of the emitter junction.

9. Darlington transistors can be identified by their high threshold voltage and high current amplification factor.

10. Detection of protection diodes for bipolar transistors and MOSFETs.

11. Measure the threshold voltage and gate capacitance of the MOSFET.

12. Supports measurement and symbol display of two resistors, up to four digits and unit display. The resistor symbol shown is marked with the connected tester probe number (1-3) at either end. So potentiometers can also measure. If the potentiometer is adjusted to one end of it, the tester cannot distinguish between the pins in the middle and the pins at both ends.

13. The resolution of resistance measurement is 0.1 ohm, and the maximum measurement value is 50M ohm.

14. A capacitor can be detected and measured. The highest four digits and unit are displayed. Values can be from 25pf (8MHz clock, 50pF @ 1MHz clock) to 100mF. Resolution is up to 1 pF (@8MHz clock).

15. It can measure the equivalent series resistance (ESR) capacitance value of capacitors with values above 2UF. Resolution is 0.01 ohm and displays two digit values. This feature requires at least 16K Flash ATMEGA (ATmega168 or ATmega328).

16. Symbols for the correct orientation can be displayed for both diodes. Additionally, forward voltage drop is shown.

17. The LED detects as a diode, and the forward voltage drop is much higher than normal. Dual LED detection is dual diode.

18. Zener diodes can be detected if the reverse breakdown voltage is below 4.5V. This will appear as two diodes and can only be determined by voltage. The symbol of the probe surrounding the diode is the same, in this case you can identify the true anode of the diode by its threshold voltage around 700mV!

19. If more than 3 diode parts are detected, establishing the number of diodes displays an additional failure message. This will only happen if diodes are connected to all three probes and at least one is a type diode. In this case, you should only connect two probes and start the measurement again, one after the other.

20. Measure the reverse capacitance of a single diode. Bipolar transistors can also be measured if you connect the base to the collector or emitter.

twenty one. Only one measurement is required to find the connections across the entire bridge.

twenty two. Capacitors with values below 25pf are usually not detectable, but can be connected in parallel with a diode or at least a 25pf capacitor. In this case you have to subtract the parallel capacitor value.

twenty three. Resistance below 2100 ohms will measure inductance, if your ATMEGA has at least 16K flash. The range will be from 0:01mH to over 20H, but the accuracy is not good. Measurements show only single component connections.

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

25. The software can set the number of measurements before the power is automatically turned off.

26. Built-in self-test function with optional 50Hz signal to check clock frequency accuracy and wait calls (ATmega168 and ATmega328).

27. Optional device calibration port output for measurement of internal resistance and zero offset self-test capability (ATmega168 and ATmega328). A 100nF to 20uF capacitor is required between pins 1 and 3 to compensate for the offset voltage of the analog comparator. This can reduce measurement errors for capacitors above 40uF. The internal correction voltage with the same capacitor as the reference voltage is found to adjust the gain of the internal reference measurement ADC.

Thyristors and triacs can be detected if the test current exceeds the holding current. However some thyristors and triacs have higher trigger currents than this tester can provide. The available test current is only about 6mA! Note that all functions are only available on microcontrollers with more program memory such as ATmega168