Simplifying measurement tasks is the aim of the TX-DMM family of handheld true RMS digital multimeters. The new DMMs incorporate a design that provides an easy-to-use interface, a large digital readout and Windows 95/NT compatibility. The all-digital architecture is said to allow the instruments to deliver accuracy and high-quality ac settling time. Also available is the optional WSTRM, consisting of an optically isolated PC interface cable and WaveStar for Meters software. The WSTRM's remote capabilities convert TX-DMM multimeters into virtual instruments and data acquisition systems.The TX-DMM family consists of the TX1, which is designed to provide a robust set of features, and the TX3, which delivers advanced features such as a built-in thermometer and 4-20 mA process loop measurements. The family features simultaneous reading of ac and dc measurements using dual numeric displays, allowing users to make ac and dc measurements without changing functions on the meter.