When using a multimeter to measure direct current, what should be done first?

When using a multimeter to measure direct current (DC), the first step should indeed be to disconnect power to the circuit. This is crucial for ensuring safety during the measurement process. By disconnecting the power, you reduce the risk of electric shock and prevent any potential damage to the multimeter or circuit components.

Understanding that a multimeter can measure various electrical parameters, it's essential to approach the measurement process safely. After ensuring the circuit is de-energized, you can proceed to set the meter correctly to the appropriate DC measurement settings, connect the leads to the circuit, and then reapply power if necessary for the measurement. This methodical approach helps prevent any accidents or incorrect readings, fostering a safer working environment while ensuring accurate measurements.