Multimeter direct current measurement method
Current measurement is not the same as measuring other quantities with a DMM. The direct current measurement method is to connect the digital multimeter directly to the circuit under test, so that the current of the circuit under test flows directly into the internal circuit of the multimeter. The indirect measurement method does not require opening the circuit and stringing the multimeter to the circuit under test. The indirect method uses a current clamp.
direct measurement
1. Turn off the circuit power
2. Disconnect or desolder the circuit in order to string the meter into the circuit
3. Select the corresponding AC (A), DC (A--) gear
4. Insert the black test lead into the COM socket and the red test lead into the 10A jack (10A) or the 300mA jack (300mA). The choice of which jack is mainly based on the possible measurements.
5. Connect the test leads to the disconnected circuit part in series.
6. Turn on the circuit power
7. Observe the readings and note the units.
Note: When measuring DC, if the test probe is reversely connected, "-" will appear.
