The AEMC Clamp-on Meter Model 512 is a general purpose professional instrument that measures up to the toughest standards. It is built into a rugged mechanical case and is designed using quality polycarbonate materials. This meter offers a complete set of measurement ranges and is in compliance with international safety and quality standards to ensure a professional and reliable measuring tool. The Model 512 is auto-ranging and provides the best measurement range and resolution for troubleshooting. It has a high resolution 40A range. The Model 512 measures AC current, AC and DC voltage, resistance, continuity with beeper, and frequency from V or A. It also features a diode test function.