RS925D Decade Resistance Standard.
RS925D Decade Resistance Standard is a four-terminal, continuously variable resistance standard. Values from 10mΩ to 1.2MΩ can be achieved using eight decade switches.
The rheostat offers a resolution of 20mΩ. Use of Evanohm, wire-wound precision resistors provide an accurate, stable standard with good temperature characteristics.
The Model RS925D can be used as a standalone resistance standard or in conjunction with the Models 801B/801C, and 240C to complete a 242D or 242E Resistance Measurement System.

• Initial Adjustment Accuracy..
  ± (20PPM + 1mΩ) at any setting

• 100Ω to 100kΩ decks individually
  trimmed to 1 to 2 PPM Accuracy

• Stability after adjustment...
  ± (20PPM + 0.5mΩ) per year

APPLICATIONS:
Used to dial in resistance to determine exact resistance values for bridge comparisons
Calibration of decade resistance standard boxes such as the DB62 series.
Used as a component of the Model 242D or 242E, 10 PPM or 5 PPM Precision Resistance Measurement System