Beschreibung
The IET Labs ESI SR103 1000 Ω is a new resistance standard recently developed to improve the range of primary standards available. The ESI SR103 precision Transportable Resistance Standards are oil filled, hermetically sealed, five-terminal resistance standards designed for precision bench top or oil bath applications. The long-term stability of these resistance standards is typically less than 0.2 ppm per year and temperature coefficients are less than 0.1 ppm per degree Celsius. This excellent long-term stability and low temperature coefficient is achieved by using matched groups of resistors constructed of the alloy Evanohm-R. The resulting low temperature coefficient allows high performance applications of these standards inside or outside an accurately controlled temperature environment. Maximum accuracy is calculated as a temperature corrected resistance value. This is accomplished by using the built-in RTD temperature sensor to measure the internal temperature and referencing a temperature correction chart provided with each unit. The measurement accuracy of the built-in RTD thermometer is better than 0.1 degree Celsius. The resistors are surrounded by oil to conduct heat generated by the measuring currents out through the stainless steel case. These characteristics facilitate precise laboratory comparisons without critical environmental controls and are used wherever a need for a very accurate, stable resistor of low temperature coefficient is required.
Models: SR103 €10.744, SR103/DC €10.744.
Each unit includes:
•5 Year Warranty
•Built-in temperature sensor
•Temperature correction chart
•Instruction manual
•ISO/IEC 17025 calibration certificate