The versatile TRUE RMS digital clamp-on probe is suitable for precise measurement of direct and alternating current and ideal for fault finding in electrical systems, appliances, vehicle technology, controls and fire and burglar alarm systems. It is equipped with true RSM that also measures loads from non-linear wave patterns. These come from equipment such as LED lighting, frequency-controlled drives, electronic controls and heating, ventilation and air conditioning systems. Values, measured in the same place, with and without True RMS, can therefore differ and could cause damage and malfunction in the system. Show more