The 9040 is effective for measuring phase rotation in all areas where three phase supplies are used to feed motors, drives and electrical systems. The 9040 is a rotary field indicator and can provide clear indication of the 3 phase via an LCD display and the phase rotation direction to determine correct connections. It allows rapid determination of phase sequence and has a voltage (up to 700 V) and frequency range suitable for commercial and industrial applications. The included test probes have a variable clamping range for safe contact, also in industrial sockets. Specification: Voltage range: 40-700 V Frequency range: 15-400 Hz Operating timer: Continuous Environmental Specifications Operating temperature: 0 C to 40 C Dust/water resistance: IP 40 Safety Specifications Electrical Safety: EN 61010, EN 61557-7 Over voltage category: CAT III, 600 V, CAT IV, 300V