Before use, you should be familiar with the functions of the multimeter, and select the correct gear, range and test lead jack according to the object to be measured.
When the size of the measured data is unknown, the range switch should be set to the maximum value, and then switched from the large range to the small range, so that the pointer of the meter indicates more than 1/2 of the full scale.
When measuring resistance, after selecting the appropriate magnification gear, touch the two test pens to make the pointer point at the zero position. If the pointer deviates from the zero position, adjust the "zero" knob to make the pointer return to zero to ensure accurate measurement results. If it cannot be adjusted to zero or the digital display gives a low voltage alarm, it should be checked in time.
When measuring the resistance of a circuit, the power supply of the circuit under test must be cut off, and no live measurement is allowed.
When using the multimeter to measure, pay attention to the safety of the person and the instrument and equipment. During the test, do not touch the metal part of the test pen with your hands, and it is not allowed to switch the gear switch with electricity to ensure accurate measurement and avoid accidents such as electric shock and burning of the instrument.
