For troubleshooting 4–20 mA signals without breaking the loop. Supports signal sourcing and loop power for transmitter testing. The detachable miniature clamp measures 4–20 mA signals without opening the loop. Test jacks support current measurement, sourcing and simulation up to 24 mA; 24 V loop power supports transmitter checks. Also measures DC voltage to 30 V and sources DC voltage to 10 V.