With no circuit disturbance, the CP41 AC/DC true-rms clamp meter measures current to an accuracy of ±1% of reading with a resolution of 1mA. The instrument measures dc or ac currents with a resolution of 1 mA and, on its AC ranges, with true-RMS current indication. It has a four-digit LCD and full-scale readings are up to 4A or 40A with auto-ranging and auto-zero functions. The CP41 uses compensated Hall-Effect sensing in a patented magnetic circuit to detect the magnetic current generated by the current of interest and its design supports safe, single-handed operation in hazardous areas, assisted by a display-hold function which allows the user to take a measurement in a difficult-to-reach location. The CP41 meets safety requirements of EN61010-2-032:2002 and EMC specifications of EN 61326-2-2:2006. GMC-I PROSyS Ltd., Lancashire, UK. +44 1695 567 280.