The 4234361 is a precision current loop calibrator designed to quickly and accurately measure or source current and power up a process loop. It provides best-in-class accuracy of 0.01% across its measurement ranges of 0 to 24 mA and 0 to 30 V dc, with a fine resolution of 1 µA on mA ranges. Key features include a 24 V dc loop power supply with mA measure mode, a large backlit graphic display, and an intuitive rotary knob for fast setup. The 709H variant adds powerful HART communication, allowing technicians to read device information, perform diagnostic tests, and trim the mA output on most HART-enabled transmitters. This compact and rugged tool is ideal for field technicians servicing and supporting process control instrumentation in a variety of industrial environments.