Tektronix TCP0030A AC/DC Current Probe 120MHz 5A/30A DC TekVPI TestedTektronix TCP0030A AC DC Current Probe 120MHz 5A 30A DC TekVPI Tested Excellent used condition, each unit tested and Degausss AutoZero works just like it should and passes quickly on each unit. They are out of calibration by less than a year. Some minor cosmetic issues, a cable scuff, some light markings on the side. Units were tested using a Keithley sourcemeter to generate a specific low mv dc current, and an AC line on a lamp to test AC amperage.