Guildline series 9330 Standard Resistors contain hermetically sealed resistance element s. Its design is based on a thorough reappraisal of all earlier resistor designs, the aim of the program being the sig nificant reduction of each “classical” source of error; temperature coefficients and variations therein; thermal as well as electrical time constants; thermal EMF’s ; and voltage and power coefficients. The resistance wire element is suspended in oil in a hermetically sealed case with a cover plate of low leakage acrylic. The connections to the resistance element are made in a four-terminal configuration, with the potential terminals mounted on the cover plate and the current terminals on the horns. All terminals are solid thermal copper to reduce thermal EMF’s. Models 9330-10M & 100M have a cover plate made from Delrin acetyl thermoplastic and use a two-terminal configuration plus a ground terminal (no horns). Values below 10M ? are designed to be immersed in temperature controlled oil or air baths. 9330 Features > Stability < 3.5 ppm > Low thermal EMF design > Nominal Accuracy to < 2.5 ppm > Report of Calibration traceable to NIST or NRCC included > Available from 0.1 ? through 100M ? in decade values > 4-terminal design up to 1M? > Special values available on request > Temperature Coefficient < 2 ppm/0 C > Hermetically sealed in oil > Designed for use in temperature controlled oil baths > Operating Range 18 0C to 40 0C