In electrical testing, a megohmmeter is calibrated to read which unit of measurement?

A megohmmeter is specifically designed to measure the resistance in ohms, particularly in the range of megohms, which is one million ohms. This instrument is essential for assessing the insulation resistance of electrical equipment and systems. When testing insulation, the megohmmeter applies a high voltage and measures the resulting current, which is then used to calculate the resistance in ohms. The higher the resistance measured, the better the insulation quality, indicating less current leakage. Therefore, the unit of measurement associated with a megohmmeter is ohms, making it the appropriate answer for this question.