When measuring voltage with a multimeter, what is an important safety practice?

When measuring voltage with a multimeter, ensuring that the device is set to the correct voltage scale is crucial for safety and accuracy. If the multimeter is not set to the appropriate scale for the voltage being measured, the device may not provide a true reading, potentially leading to misunderstandings about the circuit's condition. This situation could result in mishandling of electrical components, posing risks of electric shock or equipment damage. Additionally, using the wrong setting can lead to overloads that may damage the multimeter itself.

Using the correct voltage scale helps protect both the user and the multimeter, ensuring that measurements are not only accurate but also within safe operational limits. While calibration, checking only on powered devices, and ensuring the multimeter has a higher voltage rating are all important practices, they do not directly address the essential requirement of using the proper settings for accurate voltage measurement.