June 19, 2013 – Fluke Corporation with Hart Communications introduce the Fluke 709H Precision Current Loop Calibrator, a tool with a user-friendly interface and Hart capabilities that reduces the time it takes to measure or source, voltage or current, and power up a loop, says Fluke. It features a built-in, selectable 250-ohm resistor to tune the loop for Hart Communications. The 709H and non-HART 709 models also offer an interface with dedicated buttons, a Quick-Set rotary encoder knob, and two wire connection for measurements.