Transistor Tester LCR-T4 Graphical ESR SCR Case Brand New

1。useATmega8，ATmega168orATmega328micro controller。2。2x16Character LCD display results。3。Easy Shuttle ，Automatic power off。4。Turn off current only20nA，Support battery operation。5。The low-cost version does not use crystal oscillator，Support automatic power off。1.05kVersion of softwareATmega168orATmega328Use sleep mode to reduce power consumption when there is no measurement。6。automatic detectionPNPandNPNBipolar transistor，N、PChannelMOSFET，JFET，diode，Double diode，Thyristor thyristor。7。Auto detect pin layout。8。Measure the current amplification factor of bipolar transistor and the threshold voltage of emitter junction。9。Darlington transistors can be identified by high threshold voltage and high current amplification factor。10。Pair bipolar transistor，MOSFETDetection of protective diode。11。measureMOSFETThreshold voltage and grid capacitance。12。Support the measurement and symbol display of two resistors，Up to four digits and units are displayed。Both ends of the resistance symbol displayed are the number of connected tester probes（1-3）。So the potentiometer can also measure。If the potentiometer is adjusted to one end，The tester cannot distinguish between the middle and both ends of the pin。13。The resolution of resistance measurement is0.1Ohm，Maximum measured value50MOhm。14。A capacitor can be detected and measured。Up to four digits and units are displayed。The value can be from25pf（8MHzClock，50pF@ 1MHzClock）reach100mF。Resolution up to1 pF（@ 8MHzClock）。15。Can for2UFEquivalent series resistance of capacitors above（ESR）Capacitance measurement。Resolution is0.01Ohms and display two digit values。This feature requires at least16KFlash MemoryATMEGA（ATmega168orATmega328）。16。Symbols in the correct direction can be displayed for both diodes。in addition，Display forward pressure drop。17。LEDDiode detected，The forward pressure drop is much higher than normal。Dual light emitting diodes are detected as dual diodes。18。Zener diode can be detected，If the reverse breakdown voltage is lower than4.5V。This will be displayed as two diodes，It can only be determined by voltage。The symbol of the probe around the diode is the same，under these circumstances，You can pass700mVThe threshold voltage near the diode identifies the true anode！19。****This one is clear every year，Don't turn it over****If more than3Inspection of diode parts，Establishing the number of diodes displays another failed message。This will only happen，If the diode is connected to all three probes and at least one is a type diode。under these circumstances，You should only connect two probes and start measuring again，One by one。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。21。Only one measurement is needed to find the connection of the whole bridge。22。Value below25pfCapacitors are usually not detected，However, it can be connected in parallel with one diode or at least25pfCapacitor parallel connection。under these circumstances，You must subtract the shunt capacitance。23。Resistance below2100Ohm will measure inductance，If yourATMEGAAt least16KFlash Memory。The range will be from0:01mHexceed20H，But the accuracy is not good。The measurement results show only a single component connection。24。The test time is about two seconds，Only capacitance and inductance measurement will take a long time。25。The software can set the measurement times before the power is automatically turned off。26。Built in self-test function and optional50HzCheck the clock frequency accuracy of the signal and wait for the call（ATmega168andATmega328）。27。Measurement of internal resistance and zero offset self-test capability of optional equipment calibration port output（ATmega168andATmega328）。Need one100nFreach20uFCapacitor connected to pin1And pin3Offset voltage compensation between analog comparators。This can reduce40uFMeasurement error of the above capacitors。With the same capacitor internal correction voltage, the reference voltage is found to adjust the internal reference measurementADCGain of。 If the test current exceeds the sustain current，Thyristors and bidirectional thyristors can be detected。However, some semiconductor thyristors and bidirectional thyristors have higher trigger current than the current provided by the tester。The available test current is only about6mA！be careful，All functions are only used for MCU with more program memory, such asATmega168。