Klein Tools CL390 is an automatically ranging true root mean squared (TRMS) digital clamp meter. It measures AC/DC current and NCVT via the clamp, as well as AC/DC voltage, DC microamps, resistance, continuity, frequency, capacitance and diodes via test leads, and temperature via a thermocouple probe. It features a high visibility, reverse contrast LCD display that optimises visibility in both dark or bright ambient lighting.

• Test lead holder on side of clamp and optional magnetic hanger for meter (Cat. Nos. 69445 or 69417) for hands-free operation
• Non-contact voltage tester integrated into the clamp jaw
• High-visibility reverse contrast LCD display for improved view ability in all ambient lighting conditions
• Automatically ranging true root mean squared (TRMS) measurement technology for accuracy
• Measures AC Current and NCVT via a clamp, as well as AC?DC voltage, resistance, frequency, DC micro-amp, capacitance, duty-cycle, diode test and continuity via test-leads, and temperature with a thermocouple
• Measures temperature with a K-Type thermocouple probe
• Max/Min, Rel/Zero and Data Hold capability
• Auto Power-Off after 10 minutes to conserve battery life
• Includes a carrying case, test leads with CAT III/CAT IV safety caps, thermocouple, instructions and 3 x AAA batteries
• Low-battery indicator and easily accessible battery compartment
• Built to withstand a 6.6′ (2 m) drop
• CAT III 600 V, Class 2, Double insulation safety rating
• Meets requirements for use in basic and controlled electromagnetic environments such as residential, office and light-industrial locations