Diagram of digital multimeter measuring diode, triode and circuit continuity

1. Accurately measure diodes

When measuring the diode accurately, the red DC ammeter is plugged into the "VΩ" socket and the black DC ammeter is plugged into the "COM" socket. Select the "Diode Accurate Measurement" position with the gear switch, connect the red DC ammeter to the positive pole of the diode under test, and connect the negative DC ammeter to the negative pole of the diode under test, and the forward loss of the diode can be accurately measured.

2. Accurately measure the conduction of the power circuit
When measuring the conduction of the power circuit, insert the red DC ammeter into the "VΩ" socket and the black DC ammeter into the "COM" socket. Select the "Diode Measurement" position on the gear switch, and connect the two DC ammeters to the two sides of the measured power circuit respectively. If the passive buzzer sounds at this time, it means that the two points under test are connected or the resistance between the two points is less than 90 ohms.
3. Accurately measure the transistor
When measuring the transistor magnification, there is no need to connect the DC ammeter. Select the "hFE" position on the gear switch, as shown in the figure below, and insert the measured transistor into the transistor socket on the upper right of the digital multimeter operation panel for accurate measurement. Before
accurate measurement, it is necessary to determine whether the transistor is PNP or NPN, and then insert it into the appropriate socket according to the type.