The Greenlee AC True RMS Clamp Meter (Model CM-660) is a precision measurement tool designed for professional electricians and linemen working in power distribution and industrial environments. With a 600A AC current capacity and 600V AC/DC voltage measurement range, this clamp meter delivers accurate readings even on variable frequency drives, thanks to its integrated digital low-pass filter. The AmpTip™ feature enhances sensitivity for low current and small wire applications, while the device also supports resistance, frequency, continuity, and diode testing. Its 1.18-inch jaw opening accommodates a wide range of conductors, making it suitable for troubleshooting and diagnostics in energized systems.

Built for reliability and ease of use, the CM-660 includes two voltage detection modes—non-contact and single test lead—along with data hold functionality to capture maximum, minimum, and average readings. The meter is rated for CAT III 600V and CAT IV 300V environments and comes with a 6000-count LCD display for clear visibility. It includes test leads, a carrying case, and two AAA batteries, and is backed by a lifetime warranty. This clamp meter is ideal for field technicians who require consistent performance and safety in demanding electrical applications.

Key Features:

• Measures AC current up to 600A
• Voltage measurement up to 600V AC/DC
• True RMS for accurate readings on variable frequency drives
• AmpTip™ for improved accuracy on small wires and low current
• Tests resistance, frequency, continuity, and diodes
• Dual voltage detection modes: non-contact and single test lead
• Data hold captures max, min, and average readings
• 6000-count LCD display
• Jaw opening: 1.18 inches (30 mm)
• CAT III 600V, CAT IV 300V rated
• Includes test leads, carrying case, and (2) AAA batteries