The Fluke 772 Milliamp Process Clamp Meter measures 4 to 20 mA signals without “breaking the loop”.
The 772 meters can source 4 to 20 mA signals for testing control system I/O or I/Ps, simulate
4 to 20 mA signals for testing control system I/O and measure 4 to 20 mA signals with in-circuit
measurement. They can also simultaneously measure milliamps in-circuit with 24 V loop power for
powering and testing transmitters as well as source mA output signals in a linear ramp or 25%
step output.