LCR-T4 Graphical Transistor Tester Resistance Capacitance ESR SCR | Электроника

LCR-T4 Graphical Transistor Tester Resistance Capacitance ESR SCR | Электроника

cb size: 63*71 mm weight: about 48g

LCR-T4 Graphical Multifunction Tester Resistance + Capacitor + Diode + SCR + Inductance + Triode + MOS Tube

The liquid crystal is a 12864 liquid crystal display with a backlight, and the color of the backlight is generally yellow-green.

The power supply is a 9v stacked battery. If you supply power for a long time, you can use 2 lithium batteries to form an 8.4v battery pack.

Features

* Added boot voltage detection function

*Automatically detect NPN and PNP transistors, N-channel and P-channel MOSFETs, diodes (including double diodes), thyristors, triodes, resistors and capacitors, etc.

*Automatically test the component pins and display them on the LCD

*It can detect the amplification factor and base of transistors, MOSFET protection diodes, etc. to determine the forward bias voltage of the emitter transistor

*Measure gate threshold voltage and gate capacitance of MOSFET

*The display uses 12864 lcd liquid crystal (128 * 64 characters)

*Higher test speed, validity period Component test: within 2 seconds (except for larger capacitors, the measurement of large capacitance takes a longer time, the measurement time is 1 minute is normal)

*One-key operation, power-on test, one-key operation.

*Power consumption off mode: less than 20 nA

*Automatic shutdown function can avoid unnecessary waste, save battery energy and improve battery life.

*******The following functions are different for the M8 version and the M168 advanced version****Please choose according to your needs*********

1. Use ATmega8, ATmega168 or ATmega328 microcontrollers.

2. 2x16 character LCD display results.

3. One-key operation, automatically turn off the power.

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

5. The low-cost version does not require a crystal oscillator and supports automatic power-off. ATmega168 or ATmega328 with 1.05k version software uses sleep mode to reduce power consumption when there is no measurement.

6. Automatic detection of PNP and NPN bipolar transistors, N and P channel MOSFETs, JFETs, diodes, double diodes, thyristor thyristors.

7. Automatically detect the 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 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. Support the measurement and symbol display of two resistances, up to four digits and unit display. Both ends of the displayed resistance symbol are the connected tester probe numbers (1-3). So the potentiometer can also be measured. If the potentiometer is adjusted to one end of it, the tester cannot distinguish the middle and both ends of the pin.

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

14. A capacitor can be detected and measured. The highest four digits and unit display. The value can be from 25pf (8MHz clock, 50pF@1MHz clock) to 100mF. The resolution can reach 1 pF (@ 8MHz clock).

15. It can be used to measure the equivalent series resistance (ESR) capacitance of capacitors above 2UF. The resolution is 0.01 ohms and two-digit values are displayed. This function requires at least 16K flash ATMEGA (ATmega168 or ATmega328).

16. It is possible to show signs of the correct direction for two diodes. In addition, the forward pressure drop is displayed.

17. The LED is detected as a diode, and the forward voltage drop is much higher than normal. The double LED is detected as a double diode.

18. The Zener diode can be detected if the reverse breakdown voltage is lower than 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 the threshold voltage near 700mV!

19. ****I understand this every year, don’t turn it over ****

If more than 3 diode parts are tested, the number of established diodes will display another failure message. This will only happen if the diode is 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 and collector or emitter.

twenty one. Only one measurement is needed to find out the connection of the full bridge.

twenty two. Capacitors below 25pf are usually not detected, but can be connected in parallel with a diode or at least a 25pf capacitor in parallel. In this case, you must subtract the part of the parallel capacitance value.

twenty three. Resistance below 2100 ohms will measure inductance, if your ATMEGA has at least 16K flash memory. The range will exceed 20H from 0:01mH, but the accuracy is not good. The measurement results only show a single component connection.

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

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

26. Built-in self-check function and optional 50Hz signal check the clock frequency accuracy and wait for calling (ATmega168 and ATmega328).

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

If the test current exceeds the holding current, the thyristor and triac can be detected. However, some semiconductor thyristors and triacs have higher trigger currents than the tester can provide. The available test current is only about 6mA! Note that all functions are only used for microcontrollers with more program memory such as ATmega168.