Process current clip-on 771 for mA. With Fluke 771 you no longer need to lift a cable away from a terminal (break the loop) to measure 4-20 mA, which directly affects the service time. Using Fluke 771 you do not need to call to a control room to override control of a process loop when you break the loop and you save time when testing analogue I/O on a PLC, if you do not need to check the measurements on a console. In addition, Fluke 771 can affect your overall costs in other ways by eliminating catastrophic installation stoppages caused by critical loops being opened by mistake.