|
 |
 |
 |
View Paper |
Session Topic: 1E, DC Voltage |
|
|
Paper Title: Verifying Precision Voltage Dividers and High Resistance Ratio Bridges Using a Josephson Voltage Standard |
|
|
Date & Time: MONDAY, August 5, 2002 |
|
10:45am - 12:15pm
PARALLEL SESSIONS - SESSION 1 |
|
|
Speaker: Neil Faulkner
Fluke Precision Measurement |
Email: neil.faulkner@fluke.com |
|
|
Directly verifying the ratio accuracy of precision voltage dividers, which have a specification around 0.1 to 0.2 ppm at a division ratio of 10:1, is very challenging. A Josephson Voltage Standard (JVS) has the required uncertainty for the measurements but the output resistance of these dividers is high enough (>40 kOhm) that a direct measurement of the divider output with the JVS has high uncertainties. A method is described using a second low resistance divider yielding acceptable uncertainties with the JVS. The results of the measurements on two models of dividers are given. This method can also be used to verify high resistance ratio bridges. Also discussed are refinements that were made to the Fluke JVS in Everett, Washington to reduce the uncertainty of measurement at 1 V and below. |
|
 |
 |
|
NCSL International © 1996-2002 All Content. 1800 30th Street, Suite 305, Boulder, Colorado 80301-1026
Tel: (303) 440-3339 Fax: (303) 440-3384 info@ncsli.orgCD-ROM produced by X-CD Business Solutions |
|