Use of a Direct Current Amplifier and Recorder to Balance a Mueller Resistance Bridge
- 1 May 1959
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 30 (5) , 339-343
- https://doi.org/10.1063/1.1716618
Abstract
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 μv 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.Keywords
This publication has 3 references indexed in Scilit:
- Low-Level Thermocouple Amplifier and a Temperature Regulation SystemReview of Scientific Instruments, 1955
- Method of Reducing Zero Error and Drift in Breaker Type dc AmplifiersReview of Scientific Instruments, 1955
- A Contact Modulated Amplifier to Replace Sensitive Suspension GalvanometersReview of Scientific Instruments, 1946