he actual measurement of the current measured by the Digital multimeter:
(1) Select the appropriate gear (measure current, current value range)
(2) Disconnect the line under test (but the electrical equipment and the load cannot be disconnected, otherwise the line is short-circuited!), insert the multimeter into the line (note that it is connected in series), at this time the resistance of the multimeter is almost zero, and the current flowing through the multimeter It is equal to the current flowing through the electrical equipment and the load.
2) If it is a larger electrical equipment (working voltage is generally 220V to 380V), it is recommended to use a clamp-type ammeter (multimeter). The principle is to form a closed electromagnetic field on the power line, and the change of the electromagnetic field causes the multimeter to generate current. This current is proportional to the line current under test, so that the line current can be read directly in the ammeter.
