MALVERN, Pa. — August 13, 2013 — Vishay Precision Group, Inc. (NYSE: VPG) today announced that its Vishay Foil Resistors brand (VFR) has released a new video that explores using VFR Bulk Metal® Foil commercial off-the-shelf (COTS) resistors to calibrate and maintain the accuracy of precision temperature measurement systems utilizing resistance temperature detector (RTD) sensors. The short video demonstrates the selection and use of foil resistors to simulate physical parameters in the calibration of RTD-based temperature measurements, and how the ultra-low-TCR precision resistors are nearly immune to drift over temperature and time, making them the ideal reference to check against RTD under any operating condition. With Bulk Metal Foil resistors, RTD-based systems can be recalibrated in harsh environments and hold their accuracy for several years.
RTD measurement instrumentation must maintain calibration regardless of the end user or application. Ultra-precision temperature accuracy is required for extended periods of time in a variety of extremely harsh environments, such as oil platforms, deserts, and the Antarctic. Resistors used in these applications must be rugged and impervious to heat and humidity, with low absolute TCR to perfectly simulate the value of the RTD at defined temperatures. Traditional standard resistors, however, are expensive, fragile, and do not provide the accuracy required.
The demo video highlights the characteristics of VFR's Bulk Metal Foil resistors for RTD calibration. RTD-based systems can be recalibrated with precision foil resistors instead of expensive certified physical standards, even in extreme operating environments. Rugged, tight-tolerance foil resistors with TCR of only 0.2 ppm/°C from -55°C to +125°C, and a long-term stability of 2 ppm per year (worst case) can be supplied to the exact resistance necessary to duplicate platinum, nickel, and copper temperature sensors at critical temperatures. Available with a hermetic seal for ruggedness, the compact resistive devices can be trimmed to unique resistance values. Any conceivable ohmic value to six digits is available with an absolute tolerance to ±0.001%. Due to the devices' convenient built-in calibration factor, these values can be provided in only a few days at a low cost.
Further information about Vishay Foil Resistors products is available at www.vishayfoilresistors.com. Follow Vishay Foil Resistors at http://twitter.com/foilresistor.
About Vishay Precision Group
Vishay Precision Group (VPG) is an internationally recognized designer, manufacturer and marketer of: components based on its resistive foil technology; sensors; and sensor-based systems specializing in the growing markets of stress, force, weight, pressure, and current measurements. VPG is a market leader of Foil Technology Products, providing ongoing technology innovations in precision foil resistors and foil strain gages, which are the foundation of the Company’s Force Sensors Products and its Weighing and Control Systems. The product portfolio consists of a variety of well-established brand names recognized for precision and quality in the marketplace. To learn more, visit VPG at www.vishaypg.com.
About VPG Foil Resistors
VPG Foil Resistors, a part of Vishay Precision Group (VPG), produces the most precise and stable resistors available. Distinguished by the premier brands Vishay Foil Resistors, Powertron, and Alpha Electronics, the VPG Foil Resistors portfolio includes discrete resistors and resistor networks in surface mount and through-hole (fixed-lead) configurations; customized chip resistor networks; precision trimming potentiometers; and discrete chips for use in hybrid circuits. These devices are used in applications requiring a high degree of precision and stability, such as in medical testing equipment, semiconductor equipment, precision measuring instruments, aerospace, and military applications. To learn more, visit www.vishayfoilresistors.com.
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