Use of a Direct Current Amplifier and Recorder to Balance a Mueller Resistance Bridge
作者:
George T. Armstrong,
P. K. Wong,
L. A. Krieger,
期刊:
Review of Scientific Instruments
(AIP Available online 1959)
卷期:
Volume 30,
issue 5
页码: 339-343
ISSN:0034-6748
年代: 1959
DOI:10.1063/1.1716618
出版商: AIP
数据来源: AIP
摘要:
By taking corrective action for electrical noise resulting from alternating current pickup and induced electrostatic charges, it has been possible to use a commercially available high gain dc amplifier and a recorder to balance a G‐3 Mueller resistance bridge. Noise levels below 0.01 &mgr;v peak to peak were observed with a response time of approximately five seconds. Using a 25‐ohm platinum resistance thermometer and 1‐ma thermometer current, a precision of 0.0001°C was obtained in temperature measurement. The permanent and continuous record provided offers advantages over the ordinary optical galvanometer for the observation of time‐dependent phenomena and the study of sources of error.
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