The Model 80i-600 is a clamp-on ac current probe designed to extend the current measuring capability of an ac current meter to 600 amperes. A clamp-on, 1000-turn coil designed into the probe allows measurements to be made without breaking the circuit under test. The coil serves as the secondary of a current transformer. The current carrying conductor being measured serves as the primary. Because of a high efficiency, quadrature type of winding used. wire size and the position of the wire within the probe jaws does not effect accuracy.