Fluke 787 Process MeterFluke 787 Process Meter The Fluke 787 Process Meter was the first tool to combine a loop calibrator with a fully functional 1000V True RMS digital multimeter to give process technicians double the power in one tool. A maintenance and calibration tool that will be at home in every instrumentation technician's tool box, the Fluke 787 Process Meter combines a DMM and a Loop Calibrator in one rugged, handheld tool, for about what you would expect to pay