For more information:
Technical contact - Dennis Windsor
Media contact - Brad Spindler, Vishay Systems
Vishay BLH Web Tension Transmitter Measures Up to Four Zones with 750,000-Count Resolution, Output of 4 mA to 20 mA
MALVERN, PENNSYLVANIA — May 11, 2007 — Vishay Intertechnology, Inc. (NYSE: VSH) announces the release of the DXt-40 multi-zone web tension transmitter. The DXt-40, part of the Vishay Systems product portfolio, measures up to four independent web points, or zones, to ensure maximum operating speeds without belt, felt, or product breakage. Each zone is precisely measured with 750,000-count resolution and produces a corresponding high-resolution output of 4 mA to 20 mA.
The DXt-40 measures each system transducer or roll independently, thereby allowing one unit to monitor multiple tension zones. Patented technology synchronizes independent A/D converters so that multiple transducers or rolls (zones) can be evaluated simultaneously. Integrated data collected from each transducer or roll drives four high-resolution analog signal outputs. Individual displays of each transducer/roll quickly diagnose machine "hot spots" and alert system supervisors to potential failures or web breaks. When combined with HTU transducers, units measure both horizontal and vertical tension vectors. Based upon both measurements, software algorithms calculate the precise, resultant force vector, and exact linear tension component.
Total, individual, and differential outputs from two transducers (load cells) permit a comparison of tension signals on either side of a sheet, strip, or web. Digital calibration eliminates time-consuming dead-weight loading and machine strapping. When the DXt-40 web tension transmitter is used in conjunction with Vishay full Wheatstone bridge tension transducers, recalibration is seldom required.
With four integral operating modes, the DXt-40 is easy to install. Simply select the mode that matches your application, enter the transducer zero and span values, and begin system operation. The DXt-40 is designed for use in a range of equipment and systems including pulp and paper machinery, roofing machines, converting equipment, mining conveyors, and winders, rewinders, laminators, coaters, dryers, and felts.
Designers can select from a wide range of communication and network options for total system integration. Easy digital interfaces for the DXt-40 include Allen-Bradley Remote I/O, Modbus RTU, and ASCII. Approvals for the DXt-40 include FM (Factory Mutual) and CSA.
Vishay Systems is a division of Vishay Measurements Group. Vishay Measurements Group develops, manufactures, and markets components, instruments, and systems for a wide variety of test and measurement applications. Vishay strain gage products include electrical resistance strain gages for both stress analysis testing and transducer manufacturing applications, as well as strain gage instrumentation. Vishay PhotoStress® coatings and instruments use a unique optical process to detect stress and other physical forces. Vishay transducer products include load cells, force transducers, and instruments. Vishay also manufactures, installs, and services systems for weighing and force measurement and control. These include systems with transducers and instruments to control process weighing in food, chemical, and pharmaceutical plants; force measurement systems to control web tension in paper mills, roller force in steel mills, and cable tension in winch controls; on-board weighing systems that are installed in logging and waste-handling trucks; and special scale systems for aircraft weighing and portable truck weighing. Vishay Measurements Group is part of Vishay Intertechnology.
Vishay Intertechnology, Inc., a Fortune 1000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers
of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors,
and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial,
computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay’s product
innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can
be found on the Internet at www.vishay.com.
Allen-Bradley is a trademark of Allen-Bradley Co., Inc. Modbus is a trademark of Schneider Automation.