The 789 Process Meter combines a digital multimeter and a loop calibrator in a single, rugged handheld meter that offers all the features needed by technicians servicing process equipment. The Fluke 789 Process Meter has a built-in 24 V loop power supply, so no external power is needed for testing transmitters in the field. The Fluke 789's infrared interface allows data to be transferred to a PC with optional FlukeView software for further analysis and graphing.