True RMS Voltmeters Measure Complex AC

The company’s family of DATEL voltmeters claim to overcome the limitations of conventional average-responding AC voltmeters with the capability to measure the true-rms value of complex AC voltages. With an input frequency range of 47 Hz to 1 kHz, the series suits a wide range of applications including high-end consumer electronics and laboratory instrumentation. The four-wire DMS-20RM series is available with a choice of three input ranges: 20 Vac with 0.01V resolution, 200 Vac with a 0.1V resolution, and 300 Vac with a 1V resolution. Modules are available that operate from a supply voltage of either 85 to 264 Vac or 10 to 40 Vdc. No external isolation transformers or auxiliary power supply conditioning components are required. MURATA POWER SOLUTIONS INC., Mansfield, MA. (508) 339-3000.