Ridgid 37428 Digital Clamp Meter (Diameter to 30mm) The micro CM-100 is a True RMS & AutoRanging Digital Clamp Meter with a large capacity and measuring range. It can clamp around cables up to 30 mm O.D. and measure current up to 1000A AC/DC. Besides measuring AC/DC Current, the micro CM-100 can also be used as a Multimeter for 8 other functions and will provide clear and accurate readings on its large Backlit LCD. The slim and double-molded design provides easy one-handed operation and can be conveniently used in confined cable compartments. Included with the micro CM-100 are soft carrying case, test leads, Type K temperature probe and a 9V battery. Features: Large capacity & measuring range Measure current up to 1000A AC/DC 10 functions in one Clear and accurate readings on large Backlit LCD AutoRanging / true RMS Comes With: Test leads Type K temperature probe 9V battery Soft carry case Specification: Model: CM-100 Catalogue Number: 37428 Power Source: 9V Battery (included) Display: 4000 Count Backlit LCD Clamp Size Max.: 30 mm O.D. Cable Overload Protection: CAT III 600V Polarity Indication: Yes, Automatic Auto Power-Off: Yes, After 20 Minutes AutoRanging: Yes True RMS: Yes AC/DC Current Range: 40A/400A/1000A Data & Peak Hold: Yes Bargraph Display Yes Voltage: AC/DC 400mV - 600V Current: AC/DC 40A - 1000A Resistance: 400Ω - 40MΩ Capacitance: 4nF - 40mF Frequency: up to 4 kHz Diode Test: 1.5V Continuity Test: 35Ω Temperature: -40°C - 1000°C