Voltcraft VC-523 Information The Voltcraft VC-523 is a digital clamp meter that measures AC and DC current, voltage, resistance, capacitance, frequency, and temperature. It has a CAT III 600 V safety rating, making it suitable for use in electrical enclosures and for measuring high amperages in automotive electrical systems. Introduction The Voltcraft VC-523 is a versatile and easy-to-use clamp meter that is ideal for a wide range of electrical measurements. It features a large, backlit display that is easy to read in all light conditions, and it has a variety of automatic range selection features that make it quick and convenient to use. The VC-523 also includes a number of safety features, such as a non-contact voltage detector (NCV) and a rubber overmold that protects the meter from impact and vibration.