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

When measuring direct current (DC) with a multimeter, the first step is to disconnect power to the circuit. This is crucial for safety reasons, as it helps to avoid any risk of electric shock or damaging the multimeter. By powering down the circuit, you can ensure that you're measuring in a safe environment, reducing the chances of accidentally shorting the circuit or exposing yourself to live voltage.

Furthermore, when preparing to take measurements, it is essential to configure the multimeter correctly. While options like connecting the meter in parallel, changing settings, or adjusting voltage are relevant steps to consider, they should be performed after ensuring that the circuit is de-energized. Disconnection allows you to check or set up the meter without the influence of current flow, ensuring accurate readings and maintenance processes can proceed safely.