How to use the multimeter
(1) The voltage below 36V is a safe voltage. When measuring higher than 36V DC and 25V AC, it is necessary to check whether the test leads are in reliable contact, whether they are connected correctly, whether they are well insulated, etc. to avoid electric shock.
(2) When changing the function and range, the test lead should leave the test point, select the correct function and range during the test, and beware of misoperation.
(3) For DC voltage measurement, first turn the range switch to the corresponding DCV range, then connect the test lead across the circuit under test, and the voltage and polarity of the point connected to the red test lead will be displayed on the screen.
(4) For AC voltage measurement, first turn the range switch to the corresponding ACV range, and then connect the test lead across the circuit under test.
(5) For DC current measurement, first turn the range switch to the corresponding DCA gear, and then connect the meter to the circuit under test.
(6) For AC current measurement, first turn the range switch to the corresponding ACA position, and then connect the meter to the circuit under test.
(7) For resistance measurement, turn the range switch to the corresponding resistance range, and connect the two test pens across the resistance to be measured.
(8) Capacitance measurement, turn the range switch to the corresponding capacitance range, and connect the test lead across the measured capacitor and both ends to measure, and pay attention to the polarity if necessary.
(9) For the pole tube and on-off test, set the range switch to gear. Connect the red meter to the anode of the diode, and the black meter to the cathode of the diode. If the test line is on or off, connect the test leads to both ends of the line to be tested. If the buzzer sounds, the circuit is connected, otherwise the circuit is disconnected.
(10) To measure the magnification of the tube, set the range switch to the hFE position to determine whether the transistor to be measured is NPN type or PNP type, and insert the emitter, base and collector into the corresponding holes respectively.
