Описание

Transistor can be be powered with 6.8V - 12V DC. This can be achieve by a 9V layer-built battery. Two 3.7V lithium-ion battery in series or AC adapter. When powered on, the current is about 30mA at DC 9V.
Transistor Tester is controlled by a "rotary pulse encoder with switch" (RPEWS). There are 4 modes of operation - short press the knob, long press, left and right turning of the knob. Short press will switch on the transistor and start a test. It will turn off automatically at the end of the test. Long press and left or right turn will activate the function menu. Use more than to select items. Press and hold the knob to exit the function menu.
The transistor has 3 test points, TP1, TP2, and TP3, within the test socket. To the right of the test socket is the SMT test pad with identifying numbers. Attention: All ways be sure to discharge capacitors before connecting them to the tester to prevent damage. Extra caution is required if you try to test components mounted in a circuit. In either case the equipment should be disconnected from power source and you should be sure, that no residual voltage remains in the equipment.
Tips:Normally the tester shows the battery voltage with every start. If the voltage fall below a limit, a warning is shown. If you use a rechargeable 9V battery, you should replace the battery as soon as possible or you should recharge. If you try to measure little resistor values, you should keep the resistance of plug connectors and cables in mind.
The quality and condition of plug connectors are important, also the resistance of cables used for measurement. The same is inforce for the ESR measurement of capacitors. With poor connection cable a ESR value of 0.02ohm can grow to 0.61ohm. You should not expect very good accuracy of measurement results, especially the ESR measurement and the results of inductance measurement are notvery exact
Self test and calibration:
The self test can be prepared by connecting all three test point together and pushing the RPEWS.To begin the self test,the RPEWS must be pressed again within 2 seconds.The tester with prompt you for the next step.Wait until the prompt says"isolate probes"and then disconnect the test points.
Tester will soon display"1-||-3 more than 100nf".A capacitor with any capacity between 100nF and 20µF connected to pin 1 and pin 3 is required for the last task of calibration.You should connect the capacitor,after this text is shown.With this capacitor,the offset voltage of the analog comparator will be compensated for better measurement of capacity values.
Function menu descriptions:
1.Switch off
Enter this Function the Tester will shut down immediately.
2.Transistor
Transistor test,it's also the default Function at switch on.
3.Frequency
Measurement of frequency,For frequencies below 25kHz the normal measurement is followed by a measurement of period time.This additional measurement is only followed after a normal frequency measurement.
4.f-Generator
Signal generation,this Function can output square wave.with various of frequency to choice.
5. 10-bit PWM
The function"10-bit PWM"(Pulse Width Modulation) generates a fixed frequency(7812.5Hz) with selectable pulse
colour:black
Material:plastic
Package Contents:
1 * Fully assembled transistor tester
1 * DIY Acrylic case
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
Transistor Tester is controlled by a "rotary pulse encoder with switch" (RPEWS). There are 4 modes of operation - short press the knob, long press, left and right turning of the knob. Short press will switch on the transistor and start a test. It will turn off automatically at the end of the test. Long press and left or right turn will activate the function menu. Use more than to select items. Press and hold the knob to exit the function menu.
The transistor has 3 test points, TP1, TP2, and TP3, within the test socket. To the right of the test socket is the SMT test pad with identifying numbers. Attention: All ways be sure to discharge capacitors before connecting them to the tester to prevent damage. Extra caution is required if you try to test components mounted in a circuit. In either case the equipment should be disconnected from power source and you should be sure, that no residual voltage remains in the equipment.
Tips:Normally the tester shows the battery voltage with every start. If the voltage fall below a limit, a warning is shown. If you use a rechargeable 9V battery, you should replace the battery as soon as possible or you should recharge. If you try to measure little resistor values, you should keep the resistance of plug connectors and cables in mind.
The quality and condition of plug connectors are important, also the resistance of cables used for measurement. The same is inforce for the ESR measurement of capacitors. With poor connection cable a ESR value of 0.02ohm can grow to 0.61ohm. You should not expect very good accuracy of measurement results, especially the ESR measurement and the results of inductance measurement are notvery exact
Self test and calibration:
The self test can be prepared by connecting all three test point together and pushing the RPEWS.To begin the self test,the RPEWS must be pressed again within 2 seconds.The tester with prompt you for the next step.Wait until the prompt says"isolate probes"and then disconnect the test points.
Tester will soon display"1-||-3 more than 100nf".A capacitor with any capacity between 100nF and 20µF connected to pin 1 and pin 3 is required for the last task of calibration.You should connect the capacitor,after this text is shown.With this capacitor,the offset voltage of the analog comparator will be compensated for better measurement of capacity values.
Function menu descriptions:
1.Switch off
Enter this Function the Tester will shut down immediately.
2.Transistor
Transistor test,it's also the default Function at switch on.
3.Frequency
Measurement of frequency,For frequencies below 25kHz the normal measurement is followed by a measurement of period time.This additional measurement is only followed after a normal frequency measurement.
4.f-Generator
Signal generation,this Function can output square wave.with various of frequency to choice.
5. 10-bit PWM
The function"10-bit PWM"(Pulse Width Modulation) generates a fixed frequency(7812.5Hz) with selectable pulse
colour:black
Material:plastic
Package Contents:
1 * Fully assembled transistor tester
1 * DIY Acrylic case
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.

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