What is the primary function of a digital multimeter?

The primary function of a digital multimeter is to measure voltage, current, and resistance in electronic circuits. This versatile tool combines several measurement capabilities into one device, allowing technicians and engineers to troubleshoot and analyze electronic systems effectively.

Digital multimeters provide precise readings and typically display values on a digital screen, making it easier to interpret measurements. Measuring voltage can help determine if a circuit is functioning correctly; measuring current can indicate whether a device is drawing the appropriate amount of power; and resistance measurements can identify potential issues in components, such as short circuits or open circuits.

The other options reflect different functionalities that do not align with the primary purpose of a digital multimeter. For instance, converting analog signals to digital is specific to analog-to-digital converters, while amplifying audio signals pertains to audio equipment. Storing data for external devices relates more to storage systems or data loggers. Therefore, the choice highlighting the measurement abilities encapsulates the essential role of a digital multimeter in electronic diagnostics.