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ESR Volt Frequency Meter,DC5V Transistor Tester 1.77in Volt Frequency Meter Capacitance Inductance Meter High Capacity

SpecificationItem Type: Transistor TesterMaterial: PCBModel: GM328AInput Voltage: DC5V Type C Power SupplyWorking Voltage: About 30mAPlug In Measurement: SupportPatch Measurement: SupportNegative With Power: Without BatteryControl Method: EncoderDisplay Screen: 1.77 Inch TFT Color ScreenProduct Description.Rotating coding switch has 6 operation methods: short press, long press, left rotation, right rotation, press and hold left rotation, press and hold right rotation.Press it in the off state to turn on the power and start testing.If the device is not detected after one test. Press and hold the switch or turn the switch left or right to enter the function menu. Once you enter the function menu, you can select the left and right switches above or below the menu item. To enter a function item, press the switch briefly. When you need to exit a function, press and hold the switch.1. Tester calibration is used to eliminate the errors of its own components and make the final test results more accurate. Calibration is divided into quick calibration and full function calibration.2. Quick calibration operation method: use the wire to short three test points TP1, TP2, TP3, then press the test button, while observing the screen. The screen color will change to white on black and the message "Selftest mode...?" will appear. will appear, press the test key to enter the fast calibration process; if the prompt "Self test mode...?" appears, if no key is pressed within 2 seconds, the normal test process will be entered, and the wire resistance values of the shorted TP1, TP2 and TP3 test points will be displayed at the end. After entering the quick calibration process, some data will appear on the screen, regardless. Wait until a flashing string appears on the screen"Isolating Probe!" After that, remove the shorted TP1, TP2 and TP3 wires. Wait until the "Test End" string appears on the screen and the quick calibration is complete. For the first calibration, use the full function calibration mode.3. Full function calibration requires access from the function menu and an additional 220nf capacitor. Full function calibration performs a more comprehensive calibration process and takes longer. Once in the function menu, turn the test button to the "Selftest" menu item and press the test button again to enter the full function calibration process. The flashing string "short Probes!" appears on the screen first, and then, like a quick calibration, you short the three test points with wires and wait for the calibration process. The flashing string "Isolated Probes!" appears on the screen When the string "1 - | | - 3>100nf" appears on the screen, the prepared 220nf capacitors are installed on the test points TP1 and TP3. Wait until the screen prompts "Test End" to complete the fully functional calibration process.Package List1 x Transistor Tester1 x Knob Cover1 x Storage BoxNoteBefore testing the capacitance, discharge the capacitor before inserting it into the test holder for measurement, otherwise the tester's microcontroller may be damaged.

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Features1、Digital LCD display: Transistor tester is easy to read, displaying measurement data and graphs, rotating switch control, convenient button measurement. 2、Frequency Measurement: Press and hold 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 period is displayed. 3、Square Wave Generator: Multi range square wave frequency, rotate the left and right test button to switch different square wave frequencies, long press the test button to exit the square wave generator. 4、Pulse Generator: Turn the test button to the left or right to adjust the pulse duty cycle from 1% to 99%. Press and hold the test button to exit the pulse generator. 5、Power Interface: The transistor tester uses 5V Type C power interface for power supply, or it can be soldered to 9V battery interface for automatic shutdown, and the shutdown current is only about 20nA.