Direct current measurement with digital multimeter:
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 reading and note the units.
Note: When measuring DC, if the test probe is reversely connected, "-" will appear.
