The Fluke 709 Precision Current (mA) loop calibrators are designed to save time and produce high-quality results. The Fluke 709 calibrator is built around a user friendly interface with a quick-set rotary encoder knob. The Fluke 709 tool reduces the time it takes to measure, or source, current and power up a loop. The protective holster easily fits into a technician’s hand and the large backlit display is easy to read, even in dark, cramped worked areas.