Klein Tools CL390 400A AC/DC TRMS Clamp Meter

The Klein Tools CL390 is an auto-ranging True RMS clamp meter that measures AC and DC current up to 400 amps. It combines a current clamp with test-lead functions, making it useful for electrical checks without needing a separate instrument for every measurement.

CL390 measurement functions

• AC/DC current measurement through the clamp.
• AC/DC voltage measurement up to 600 volts through the test leads.
• Resistance, continuity, capacitance, frequency and diode testing.
• Temperature measurement using the supplied thermocouple.
• Reverse-contrast display, data hold and relative/zero functions.
• Includes test leads, carrying case, thermocouple and three AAA batteries.

Follow the meter instructions and ratings for each measurement. Do not test resistance or continuity on an energized circuit, and check the meter and leads before use.