A voltage calibrator is a device used to generate precise voltage levels for testing and calibrating other instruments. It ensures that measuring devices, such as multimeters and oscilloscopes, provide accurate readings by comparing them against known voltage standards. This is crucial in various industries, including electronics and telecommunications, where accurate measurements are essential. These calibrators can produce both direct current (DC) and alternating current (AC) voltages, allowing for versatile applications. By using a voltage calibrator, technicians can maintain the reliability of their equipment, ensuring that it meets the required specifications and standards, such as those set by ISO or NIST.