Megger dcm300e earth leakage clamp meter megger 6111 284 the megger dcm300e earth leakage clamp meter is primarily designed to check earth leakage currents with a dedicated 30ma range providing a resolution of 10 micro a the meter can also measure currents of up to 300a ac making it a versatile instrument capable of taking current measurements in a wide variety of applications it has a 3 frac12 digit lcd and a data hold function for awkward locations the instrument is pocket sized light