MALVERN, Pa.--(BUSINESS WIRE)--
Vishay Precision Group, Inc. (NYSE: VPG) today announced that its Vishay
Foil Resistors brand (VFR) has released a new video that demonstrates
the shunt calibration of strain gages using Bulk Metal® Foil
resistors. Providing long-term accuracy and stability regardless of the
operating environment, foil resistors provide a cost-effective and
convenient alternative to using certified weight standards for
calibration.
Link to video:http://www.vishaypg.com/foil-resistors/videos/?video=51
Used extensively in structural testing and monitoring applications,
strain gages are fundamental sensing devices that function as the
building blocks in transducers, including pressure, load, and torque
transducers. For calibration, it is especially useful to utilize shunt
resistors when the location of the strain gage beam makes it impractical
or extremely difficult to periodically check the accuracy of the bridge
circuit using a weight standard.
To illustrate how strain gage measurement systems can be calibrated
electronically using VFR Bulk Metal Foil precision resistor shunts, the
video introduced today employs a demonstration setup utilizing a half
bridge connected to a Micro-Measurements 350 Ω / 350 Ω strain gage beam.
To detect any change in resistance when under load, the bridge is
deflected by a precisely known amount using a VFR precision resistor in
parallel with one side of the strain gage. The amount to be deflected
corresponds to the deflection caused by a specific weight standard and
is calculated using the well-known parallel resistance formula: “product
over the difference.”
VFR Bulk Metal Foil precision resistors are the perfect solution for
shunt calibration because they are readily available with non-standard
values in any order quantity. With any conceivable ohmic value to six
digits available with tight tolerances, a foil resistor of the exact
value calculated for the equivalent deflection can be used to accurately
detect any changes in the strain gage bridge circuit. Furthermore, VFR
foil resistors offer extremely low TCR of less than 1 ppm/°C with
long-term stability of a couple of ppm per year, ensuring very accurate
shunt calibration for years to come.
Further information about VFR 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.
Bulk Metal is a registered trademark of Vishay Precision Group, Inc.
Link to video screen shot: http://www.flickr.com/photos/[email protected]/9775241044/sizes/l/
Vishay Precision Group, Inc.
Marti Spalding, +1 919-374-5515
Director,
Global MarCom
[email protected]
Source: Vishay Precision Group, Inc.