How to measure current with digital multimeter
To avoid damaging the multimeter or the device under test:
Before measuring current, check the fuse of the multimeter.
When measuring, you must use the correct terminal, function file and range file.
Never connect the probes across (parallel) any circuit while the test leads are plugged into the current terminals. To test current directly with a multimeter, you must disconnect the circuit under test and connect the multimeter in series with the circuit as follows:
1) Disconnect power to the circuit and discharge all high voltage capacitors, creating a location where the probe of the multimeter can be inserted
2) Select A~ (AC) or A (DC) as needed and refer to the product manual. Plug the black test probe into the COM input jack. Plug the red test probe into the ampere (A) or milliamp (mA/uA) input jack, depending on the expected reading.
3) If you use A terminal, please set the rotary switch to mA/A position. If you use the mA/μA terminal, set the rotary switch to the μA position (for currents below 6000 μA (6 mA)) or the mA/A position (for currents above 6000 μA). Connect the probe tip across the disconnect point so that full current flows through the DMM (in series). (Touch the red probe to the higher potential end of the disconnect circuit, and the black probe to the lower potential end. Reversing the probe polarity will produce a negative reading, but will not damage the multimeter)
4) Reconnect the power to the circuit and read the displayed value; be sure to pay attention to the unit of measurement. 4) Reconnect the power to the circuit and read the displayed value; be sure to pay attention to the unit of measurement. 5) Turn off circuit power and discharge all high voltage capacitors. Remove the multimeter wiring and restore the circuit to normal operation.
