Guidelines For Implementing The New Representations Of The Volt And Ohm Effective January 1 1990

Excerpt from Guidelines for Implementing the New Representations of the Volt and Ohm: Effective January 1, 1990 Ncsl Ad Hoc Committee The SI Units of Electromotive Force and Resistance and Their Representations Josephson and Quantum Hall Effect Reference Standards of Voltage and Resistance The Internationally Adopted Values of the Josephson and von Klitzing Constants Symbols for the Old and New u.s. Volt and Ohm Representations Identifying Standards and Instruments Affected 4 Do's and Don'ts Full recalibrations may not be necessary 5 Annotate control charts Document! Document! Document! 6 Annotate calibration reports Understanding the Role of a Unit Change in the u.s. Volt Representation Changing a Local Representation Based on the Josephson Effect 8 Changing a Local Representation Based on Standard Cells Changing a Local Representation Based on solid-state References 9 Updating Control Charts Do Not Correct Pre-1990 Data Effect of the International Temperature Scale of 1990 on Standard Cells Change in the u.s. Ohm Representation Conversion Factor Examples Updating Predicted Values and Control Charts Predicted values Control charts Effect of the International Temperature Scale of 1990 on Standard Resistors Summary The Reporting of Calibration Results by nist Adjustment of Instrumentation Voltage Instrumentation Resistance Instrumentation General Considerations Regarding Adjusting Instruments Adjust instruments without using standards at your own risk Where should the adjustments be made? About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.