How to Measure Current with a Fluke Multimeter
preparation
a. Ensure that the multimeter is properly connected to the power supply and in normal working condition.
b. Ensure that the circuit under test has been disconnected from power and is in a safe state. If you need to measure high current, please use ammeter pliers.
Select the correct current measurement gear
a. Find the current measurement gear selector knob on the Fluke multimeter, usually labeled with the letter "A" or symbol "μ A" or "mA".
b. Select the appropriate measurement gear based on the estimated magnitude of the current to be measured. If unsure, it is recommended to start from the maximum gear and gradually adjust to the appropriate gear.
Connect the current measurement lead
a. Insert the black measuring lead of the Fluke multimeter into the socket labeled "COM" or "-". This lead serves as the grounding wire for the current.
b. Insert the red measuring lead of the Fluke multimeter into the socket labeled "mA" or "A". This lead is used to measure current.
Connect the current measurement circuit
a. Disconnect a section of the circuit under test to ensure that a Fluke multimeter can be inserted onto it.
b. Insert the red measuring lead of the Fluke multimeter into the current inlet, which is the positive terminal connection point on the circuit under test.
c. Insert the black measuring lead of the Fluke multimeter into the current outflow terminal, which is the negative connection point on the circuit under test.
Set measurement range and readings
a. Turn on the power switch of the Fluke multimeter and ensure that the multimeter is in working condition.
b. According to the current measurement gear selected in the previous steps, turn the knob of the Fluke multimeter to the corresponding gear.
c. Observe the digital display screen of the multimeter and read the current value. If there is a decimal point on the display screen, be sure to adjust the unit to milliampere (mA) or ampere (A).
Complete measurement
a. Record and analyze the measured results based on the current values read.
b. Disconnect the current measurement circuit and restore the Fluke multimeter to a safe state.
