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Director, Global Marketing Communications,
MALVERN, Pa. — Sept. 14, 2011 — Vishay Precision Group (NYSE: VPG) today unveiled a new video that gives a dramatic demonstration of the stability of the new FSR secondary standard resistor for laboratory calibration standards and digital multimeters (DMMs). Using an 8.5-digit ohmmeter, the demo shows the ability of an FSR device, built on Bulk Metal Foil® technology, to withstand rough handling with no change whatsoever in its resistance value. Even after being dropped on the floor, buried in potting soil, and doused with water, the device shows the same ohmic value out to the fifth decimal place through before-and-after tests.
Constructed as a direct plug-in device that fits most DMMs, the Vishay Foil Resistors FSR delivers new benchmark capabilities for accuracy, stability, and speed. Compared to the inductive resistors featured in most secondary standard boxes, the FSR extends the frequency range by up to 10 times with reliable accuracy at the box terminals.
The FSR is produced with infinite resolution for any required resistance value, not just typical “standard” values. The device is available with up to six significant digits (e.g. 9.99962), and a wide resistance range from 1 Ω to 150 kΩ, with any resistance value within this range available at any tolerance with no additional cost or lead time effect. Manufacturers are then able to improve the accuracy of their own products by direct reference to the exact value resistance standard needed to calibrate their products and equipments. For increased reliability, the resistor standard features an RF-shielded case, while its hermetically sealed resistive element eliminates the effects of humidity.
For test equipment designers, the new FSR maintains a long-term stability of ±0.0005% (5 ppm) at +25°C for one year, temperature coefficient of resistance (TCR) to ±0.3 ppm/°C from +15°C to +45°C (Max TCR: 10 ppm total deviation over temperature range, 30 ppm for low values), and resistance tolerance to ±0.005% (50 ppm). The FSR is supplied within 0.005% of any desired resistance value and each unit is marked with the exact measured resistance value within 10 ppm accuracy relative to certified primary resistance standards.
The FSR can be used as a substitution component for RTD, bridges, attenuators, voltage dividers, multipliers, adjustable feedback resistors for use with operational amplifiers, and network ladder elements. In addition, the FSR greatly extends the usefulness range for these instruments due to its high-frequency performance, making it ideal for use in inspection stations, in the standards laboratory, and for component evaluation.
About Vishay Foil Resistors
Vishay Foil Resistors is a division of Vishay Precision Group, producing the most precise and stable type of resistors available. The portfolio comprises products in a variety of resistor configurations and package types to meet the needs of a wide range of applications: discrete resistors and resistor networks in surface mount and through-hole (leaded) configurations; customized chip resistor networks; precision trimming potentiometers; and discrete chips for use in hybrid circuits. The foil resistors and current sensors are used in applications requiring a high degree of precision and stability, such as in medical testing equipment, high performance audio equipment, precision measuring instruments and aerospace and military applications.
About Vishay Precision Group
Vishay Precision Group (VPG) produces sensors based on precision resistive foil technology, and sensor-based systems. It provides vertically integrated products and solutions for multiple growing markets in the areas of stress, force, weight, pressure and current measurements. As a spin-off from Vishay Intertechnology, VPG’s decades-long track record encompasses innovations in foil precision resistors, current sensors, and strain gages, which have served as a foundation for VPG’s more recent expansion into strain gage instrumentation, load cells and transducers, weighing modules and complete systems for process control and on-board weighing. Vishay Precision Group may be found on the Internet at www.vishaypg.com.