| Description The Megger DCM300E is a clamp-on current leakage tester designed primarily for detecting earth leakage currents in electrical installations. Its highly sensitive 30 mA range, with a resolution of 0.01 mA, allows it to detect even very small leakage currents. The device is also capable of measuring higher AC currents up to 300 A, making it a versatile tool for general current measurements. | 
| Key specifications Measurement ranges: 30 mA, 300 mA, 30 A, and 300 A. Resolution: 0.01 mA on the 30 mA range. Jaw opening: 40 mm, suitable for clamping around conductors and busbars. Display: A 3.5-digit LCD with a 3200-count maximum reading, and an analog-style bar graph for monitoring trends. Safety rating: CAT III 300V / CAT II 600V (depending on the source, some list CAT III 500V) and double insulated. Power: Operates on two LR44 or SR44 button cells with an approximate 50-hour battery life. Dimensions: \(176\times 64\times 23\) mm (\(7\times 2.5\times 0.9\) inches) and weighs about 125g, making it lightweight and pocket-sized. |