Precision Power Analyzer targets Inverters and Drives

ZES ZIMMER Electronic Systems GmbH has announced the second power analyzer built on the new LMG600 open product platform - the LMG640. The LMG640 is equipped with the full capability list of its older and larger brother - the LMG670 - in a compact chassis which allows for up to 4 selectable power channels (elements). Notably on-board, the proprietary DualPath circuitry clears the way for simple and truly accurate efficiency measurements in inverters and drives.

With DualPath, each input channel can simultaneously measure wideband unfiltered RMS power to 10 MHz while filtering the input signals according to user requirements for precise measuring at key frequencies, such as fundamental motor frequency or pwm output. Previously, the choices were to accept error-filled results or perform 2 separate test runs with setup changes which add time, error and additional labor to the efficiency calculations. Now, everything is available in one easy step.

“DualPath removes the long-standing testing dilemma facing the design engineer.” according to Robert Emerson, general manager of U.S. subsidiary ZES ZIMMER Inc. “Until DualPath, compromised results by either re-test or Alias error were an unfortunate given. We’ve even had competitors remark how elegant our solution is and how the problem facing efficiency test has been known and not addressed before. This represents a significant step forward for power testing.”

In addition, the LMG640 and LMG670 offer an exceptional user experience. A new, completely redesigned graphical user interface allows for a simple yet robust user control. Menus and screens are logically designed, and interface to the large color display or external monitor is via touch, softkey and/or mouse. Comprehensive data logging to the on-board HDD or external device is standard, as well as the ability to stream raw waveform data out at high speed through the GB Ethernet architecture.

In addition, script editing and even creation of completely custom output screens are also a part of the standard package. Fourteen standard current ranges allow accurate measurements from sub-mA to over 30A in a single device and users can select from 3 different input specifications to best meet their testing requirements and budget.