Product News: Test & Measuring Instruments
RTD Simulator with Climate Control has TCR down to ±1 ppm/°C.
Press Release Summary:
August 14, 2014 - Bulk MetalÂ® Foil RTD Simulator resistor simulates RTD PT-100 and PT-1000 outputs for calibration of RTD instruments. Along with nominal TCR of Â±1 ppm/Â°C from -55 to +125Â°C, +25Â°C ref, and load-life stability of Â±0.005% after 2,000 hr of rated power at +70Â°C, features include power ratings to 0.6 W at +70Â°C andÂ max working voltage of 300 V. Resistance range is 10Â Ω to 5 kΩ, with tight resistance tolerance to Â±0.005% (50 ppm). Design is non-inductive (<0.08 ÂµH) andÂ non-capacitive.
Original Press Release
New VPG RTD Simulator with Built-in Climate Control Features TCR Down to ±1 ppm/°C for Precise Instrument Calibration
Press release date: August 12, 2014
The device released today provides a faster, easier, and far less expensive alternative to decade boxes and electronic simulators for the calibration of transmitters, controllers, data acquisition, process control, and lab equipment in the field, shop, or control room. Each resistor comes with certification and features its specified temperature simulation — anywhere from -200°C to +850°C — clearly printed on the device for easy identification.
"The climate control capabilities of the RTD Simulator are provided by the inherently low absolute TCR of Bulk Metal Foil resistors, which itself results from two predictable and opposing physical phenomena within the composite structure of the resistive alloy and its substrate," said Yuval Hernik, senior director of application engineering for the VFR team. "The first is that the resistance of the alloy increases with the temperature. The second is that the coefficient of thermal expansion of the alloy and substrate are different, resulting in a compressive force on the alloy when the temperature increases and a consequent decrease of the foil resistance. The two effects occur simultaneously, resulting in an unusually low predictable, repeatable, and controllable TCR."
The RTD Simulator offers power ratings to 0.6 W at +70 °C and a maximum working voltage of 300 V. The device features a resistance range from 10 Ω to 5 kΩ, with tight resistance tolerance to ±0.005% (50 ppm). Any conceivable ohmic value within this range, to six digits, is available with no additional cost or lead time effect.
Featuring a non-inductive (<0.08 µH), non-capacitive design, the RTD Simulator offers a rise time of 1.0 ns with effectively no ringing, thermal EMF of 0.05 µV/°C, voltage coefficient of <0.1 ppm/V, and current noise of 0.010 µVRMS/V of applied voltage (<-40 dB). The resistor withstands ESD spikes to at least 25 kV and is available with both lead (Pb)-free and tin/lead alloy terminal finishes.
Samples and production quantities of the RTD Simulator are available now, with lead times of five working days for prototype samples and six weeks for standard orders. Pricing for U.S. delivery only starts at $5.28 per piece.
Further information about the RTD Simulator and other Vishay Foil Resistors products is available at www.vishayfoilresistors.com. Follow Vishay Foil Resistors at http://twitter.com/foilresistor.
About Vishay Precision Group, Inc. (VPG)
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.vpgsensors.com.
About VPG Foil Resistors
VPG Foil Resistors 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 (VPG).