Amprobe ACD-50NAV [3729945] CAT IV 600A True-rms Navigator Clamp Meter. The Amprobe ACD-50NAV clamp-on power meter is ideal for industrial power monitoring and verifying system conditions. It offers a full range of diagnostics including phase sequence, power and power factor, total harmonics distortion and individual harmonics, inrush current and low pass filter.The Amprobe ACD-50NAV offers AC current measurements to 600A, AC/DC voltage to 1000V, and wide jaws to accommodate large conductors. Other features of the meter include phase rotation indication, non- contact voltage detection, inrush current measurement for motors, low pass filter for variable frequency drives, and a large 1000 count display with active backlight and analog bar graph. The new innovative navigation system eliminates multiple and confusing push buttons, and replaces them with a joystick where user can select functions directly on the display.