<div style="margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding:0px 0px 0px 0em;padding-bottom:0px;padding-top:0px;padding-right:0px"><div><kse:widget data-widget-type="customText" id="1005000000806197" type="relation"></kse:widget></div><div><span style="font-size:20px"><strong>GM328A LCD Transistor Tester Diode Capacitance Voltage Frequency Meter PWM Square Wave Signal Generator English</strong></span></div><div> </div><div style="margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;padding-bottom:0px;padding-top:0px;padding-right:0px"><span style="font-size:18px"><strong>Describe:</strong></span></div></div><div><span style="font-size:18px">Digital LCD display, easy to read, can display measurement data and graphics.</span></div><div><span style="font-size:18px">Rotary switch control, one-key measurement, easy to use.</span></div><div><span style="font-size:18px">The main chip is DIP, which is convenient for electronic enthusiasts to DIY or update the main chip.</span></div><div><span style="font-size:18px">Use 9V battery (not included), you can also use DC power supply (DC 6.8-12V).</span></div><div><span style="font-size:18px">Automatic shutdown, shutdown current is only about 20nA.</span></div><div><span style="font-size:18px">Automatic detection of NPN and PNP transistors, field effect tubes, diodes, double diodes, thyristors, thyristors, and automatic identification of transistor lead wires.</span></div><div><span style="font-size:18px">Test NPN and PNP transistor common emitter current amplification factor, base-emitter threshold voltage, and off-collector-emitter leakage current.</span></div><div><span style="font-size:18px">Support 2 resistance measurement, display its positive and negative, on-state voltage.</span></div><div><span style="font-size:18px">The maximum resolution of resistance measurement is 0.01ohm, and the maximum can be measured is 50Mohm.</span></div><div><span style="font-size:18px">The pins of the component are automatically tested and displayed on the display.</span></div><div><span style="font-size:18px">Measure the gate threshold voltage and gate capacitance of the FET.</span></div><div><span style="font-size:18px">For the following 2100Ω resistance, measure its inductance at the same time, and the measurement range is from 0.01mH-20H.</span></div><div><span style="font-size:18px">It can be used as a signal generator and frequency meter: the frequency range is from 1Hz-2MHz, and it can generate 1%-99% PWM (pulse width modulation) signals.</span></div><div> </div><div> </div><div><span style="font-size:18px"><strong>Notice:</strong></span></div><div><span style="font-size:18px">Before measuring the capacitance, the capacitor must be discharged, otherwise the meter may be damaged.</span></div><div><span style="font-size:18px">Specification:</span></div><div><span style="font-size:18px">Display: 160*128 LCD</span></div><div><span style="font-size:18px">Power supply: 1 * 9V battery (not included); DC 6.8-12V</span></div><div><span style="font-size:18px">Current: approx. 30mA</span></div><div><span style="font-size:18px">Resistance measurement: maximum. 50 megohms</span></div><div><span style="font-size:18px">Resistance resolution: 0.01ohm</span></div><div><span style="font-size:18px">Capacitance measurement: 25pF~100mF</span></div><div><span style="font-size:18px">Capacitance resolution: 1pF</span></div><div><span style="font-size:18px">DC voltage measurement: up to 50V</span></div><div><span style="font-size:18px">Screen size: 3.7 * 3cm / 1.45 * 1.18in</span></div><div><span style="font-size:18px">PCB size: 7.8 * 6.2cm / 3.1 * 2.44in</span></div><div> </div><div> </div><div><span style="font-size:18px"><strong>Package Included:</strong></span></div><div><span style="font-size:18px">1 x GM328 transistor tester (with or without case)</span></div><div><span style="font-size:18px">or</span></div><div><span style="font-size:18px">High and low base transistor tester</span></div><div><span style="font-size:18px">or</span></div><div><span style="font-size:18px">Shell</span></div><div><br/></div><p><span style="font-size:20px"><strong>Type-c</strong></span></p><p><span style="font-size:18px"><strong>Product Features:</strong></span></p><p><span style="font-size:18px">Digital LCD display, easy to read, can display measurement data and graphics</span></p><p><span style="font-size:18px">Rotary switch control, button measurement easy to use</span></p><p><span style="font-size:18px">Long press the test button to exit the frequency measurement function Frequency measurement range from 1Hz to more than 1MHz, when the measured frequency is lower than 25KHz, the display period</span></p><p><span style="font-size:18px">Square wave generator, with multiple square wave frequencies to choose from, left or right turn the test button to switch between different square wave frequencies, long press the test button to exit the square wave generator</span></p><p><span style="font-size:18px">Pulse generator, left or right test button to adjust the duty cycle of the pulse from 1% - 99%. Press and hold the test button to exit the pulse generator</span></p><p><span style="font-size:18px">Power supply using 5V Type-c power connector, customer can also solder 9V battery connector</span></p><p><span style="font-size:18px">Auto shutdown, shutdown current is only about 20nA</span></p><p><br/></p><br/><br/><p><span style="font-size:18px"><strong>Note:</strong></span><span style="font-size:18px"> Before testing the capacitor, discharge the capacitor before inserting it into the test holder for measurement, otherwise there is a risk of damaging the tester&#x27;s microcontroller.</span></p><p><br/></p><br/><br/><p><span style="font-size:18px">Input voltage: DC5V</span></p><p><span style="font-size:18px">Working voltage: about 30mA.</span></p><p><span style="font-size:18px">Transistor tester control</span></p><p><span style="font-size:18px">The tester is controlled by a rotary encoder switch.</span></p><p><span style="font-size:18px">The rotary encoder switch can be operated in 6 ways, short press, long press, left turn, right turn, press and hold left turn, press and hold right turn. </span></p><p><br/></p><br/><p><span style="font-size:18px"><strong>A short press in the off state will turn on the power and start the test.</strong></span></p><p><span style="font-size:18px">After a test is completed, if no device is detected. Long press the switch or rotate the switch left or right to enter the function menu. After entering the function menu, the left or right switch can select up or down the menu item, and to enter a certain function item, press the switch once short. When it is necessary to exit from a certain function, then long press the switch.</span></p><br/><p><span style="font-size:18px">Calibration.</span></p><p><span style="font-size:18px">Tester calibration is used to eliminate the error of its own components, making the final test results more accurate. Calibration is divided into quick calibration and full function calibration.</span></p><p><span style="font-size:18px">The operation method of quick calibration: use the wire to short the three test points TP1, TP2, TP3, and then press the test button, while paying attention to the screen. The screen color will change to white letters on a black background, and after the prompt message &quot;Selftest mode...? &quot;, press the test button to enter into the fast calibration process; if no button is pressed within 2 seconds after the message &quot;Selftest mode...? after the message &quot;Selftest mode...?&quot;, no button is pressed within 2 seconds, then a normal test process is carried out, and finally the resistance values of the three test points of TP1, TP2 and TP3 are displayed. After entering the fast calibration process, some data will appear on the screen, ignore it. Wait until a flashing string appears on the screen</span></p><p><span style="font-size:18px">After &quot;isolate Probes!&quot;, remove the shorted TP1, TP2 and TP3 wires. Wait until the string &quot;Test End&quot; appears on the screen, then the quick calibration is complete. When calibrating for the first time, use the full function calibration method.</span></p><p><span style="font-size:18px">The full function calibration is accessed from the function menu and requires an additional 220nf capacitor. Full-function calibration performs a more comprehensive calibration process and can take longer. Once in the function menu, rotate the test button to the menu item &quot;Selftest&quot;, then press the test button to enter the full function calibration process, which begins with the flashing string &quot;short Probes! When the flashing string &quot;isolate Probes!&quot; appears on the screen, remove the wires from the three test points and continue to wait for the calibration process to proceed, when the string &quot;1-||- 3 &gt; 100nf&quot;, install the prepared 220nf capacitors on the test points TP1 and TP3. Wait until the screen prompts &quot;Test End&quot;, and the fully functional calibration process is complete. </span></p><p><br/></p><br/><br/><p><span style="font-size:18px"><strong>Shipping List.</strong></span></p><p><span style="font-size:18px">GM328A Transistor Tester X1</span></p><p><br/></p>