First, the voltage below 36V is, in the test higher than 36V DC, 25V, to the pen is reliable contact, whether the correct connection, whether the insulation is good, so as to avoid electric shock.
Two, change the function and, the marker should leave the test point, the test to choose the right function and, beware of misoperation.
Three, measurement, first switch to the corresponding DCV range, and then the test pen across the measured circuit, red pen connected to the point voltage and polarity displayed on the screen.
Four, measurement, first the range switch to the corresponding ACV range, and then the test meter pen across the test circuit.
Five, the measurement, the first range switch to the corresponding DCA gear, and then the meter into the test circuit.
6. For measurement, first turn the range switch to the corresponding ACA gear, and then string the instrument into the circuit under test.
Seven, the range switch to the corresponding resistance range, the two meter pen straddled on the measured resistance.
Eight, capacitance measurement, the range switch to the corresponding range, the test meter pen across the measured capacitance, both ends of the measurement, when necessary, pay attention to polarity.
9. Pole tube and on-off test, shift the range switch. Connect the red watch to the positive pole, and the black watch pen to the negative pole. If the test line is on or off, the meter pen is connected at both ends of the line to be measured, such as the ring circuit, on the contrary, the circuit is disconnected.
To measure the magnification factor of the tube, turn the range switch to hFE, decide whether the measured is NPN type or PNP type, insert the base pole and the corresponding hole respectively.