Klein Tools CL320 Clamp Meter Is An Automatically Ranging True Root Mean Square (TRMS) Digital Clamp Meter That Measures Ac Current and NCVT Via The Clamp, Ac/DC Voltage, DC Microamps, Resistance, Continuity, Frequency, Capacitance, and Tests Diodes Via Test-Leads, and Temperature Via A Thermocouple Probe. Features Include Auto Range to Improve Efficiency and Speed When Making Measurements Diode Test to Troubleshoot Malfunctioning Diodes Max/Min to Understand The Variability From Average Of An Electrical P