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Supplementary investigations to PTB's evaluation of G

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Winfried Michaelis, Jürgen Melcher and Holger Haars

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LETTER TO THE EDITOR

In addition to earlier experiments on the determination of G that were carried out in the PTB, supplementary investigations of the electrostatic torque transmitter unit have been performed. We have identified a previously overlooked effect that is capable of reducing the deviation from other determinations by an order of magnitude. Additionally, the uncertainty associated with the former value has to be enlarged.


PACS

84.37.+q Electric variable measurements (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.)

04.80.-y Experimental studies of gravity

06.20.Jr Determination of fundamental constants

Subjects

Electronics and devices

Instrumentation and measurement

Gravitation and cosmology

Dates

Issue 6 (December 2004)

Received 26 March 2003

Published 4 October 2004


An Erratum for this article has been published in 2005 Metrologia 42 67


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