A precise automatic a.c. potentiometer for low temperature resistance thermometry
- 1 August 1969
- journal article
- physics exhibition
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 2 (8) , 659-660
- https://doi.org/10.1088/0022-3735/2/8/316
Abstract
An instrument is described which measures resistance without lead errors. Low frequency a.c. is used to avoid thermal errors and reduce current noise. Useful resolution is possible with less than 10−14 W dissipation in the sensor. The indication is direct reading in resistance, has six-decade resolution, is fully automatic in balance, has a digital output signal and follows changes in resistance with a minimum of delay even at very low detector bandwidths.Keywords
This publication has 3 references indexed in Scilit:
- Cryostat for the Measurement of Thermal Conductivity and Specific Heat between 0.05 and 2°KReview of Scientific Instruments, 1968
- An a.c. double bridge with inductively coupled ratio arms for precision platinum-resistance thermometryProceedings of the Institution of Electrical Engineers, 1963
- The Electrical Conductivity and Current Noise of Carbon ResistorsProceedings of the Physical Society. Section B, 1953