Nbs Phase Angle Calibration Standard

Author : R. S. Turgel
Publisher : Forgotten Books
ISBN 13 : 9781528420808
Total Pages : 186 pages
Book Rating : 4.4/5 (28 download)

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Download or read book Nbs Phase Angle Calibration Standard (Classic Reprint) written by R. S. Turgel and published by Forgotten Books. This book was released on 2017-10-28 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Nbs Phase Angle Calibration Standard Nhi1e a comp1ete and meaningfu1 se1f - test of both digita1 and ana109 circuitry is a desirab1e goa1, it wou1d have added an unreasonab1e amount of comp11cat10ns both in hardware and software. However, some of the critica1 digita1 contro1 functions are tested in the present sys tem. During 1n1t1a1ization of the instrument, a cyc1ic redundancy pro cedure checks the integrity.of the program instructions and, more 1mportant1y, the correction tab1es which are a1so stored in read-on1y memory. A1so, during this procedure the identification number of the critica1 hardware modu1e, for which the correction tab1es are designed, is brief1y disp1ayed on the readout and thereby provides a visua1 check that the firmware and hardware modu1es are compat1b1e. At the end of the 1n1t1a1ization and se1f-check routine, rather than 1eaving the sys tem in its quiescent state, defau1t parameters are automatica11y entered. These provide a 1ow-1eve1, 1ow-frequency output of the Phase Standard that can be used for a quick visua1 check on an osc111oscope which assures the operator that the system is operating proper1y. Care has a1so been taken in the design to enab1e recovery of the system from externa11y-induced fau1ts, such as 1arge vo1tage spikes, which might interfere with the order1y execution of the operating pro gram. In many cases the system wi11 recover by itse1f, but recovery to the defau1t va1ues can a1ways be accomp1ished using the 'reset' contro1. 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.