The Fluke 789 Process Meter is the ultimate troubleshooting tool for electricians and instrumentation professionals. It combines the functionality of a loop calibrator with the power of a digital multimeter, and the wireless capabilities of Fluke Connect connectivity with optional Ir3000Fc module. In addition to the large display, the Fluke 787 is extra bright with two levels of backlighting. Its built-in, selectable 250 ohm Hart resistor eliminates the need to carry a separate resistor. Wireless Connectivity The 789 also has a 24-Volt loop supply, which reduces the need to carry a separate power supply when doing offline transmitter testing. You can add an optional temperature measurement module and the wireless data logging capabilities of the Fluke Connect mobile app to log data wirelessly to your smart phone and review it from a remote location. The process technicians can do a lot more while carrying a lot less. This Process Meter offers externally accessible fuses and batteries for easy replacement. Multiple Modes The 789 Process Meter includes 0% and 100% buttons to toggle between 4 and 20 m A sourcing for a quick span check. It provides all standard DMM capabilities including frequency measurement to 20 k Hz, Min/Max/Average/Hold/Relative modes, and diode test and continuity beeper. It provides 20 m A DC current source/loop calibrator/simulator. The device offers manual step (100%, 25%, Coarse, Fine) plus auto step and auto ramp. It also delivers 0.1% DC voltage accuracy and 0.05% DC current accuracy.