Sound-card-based Johnson noise thermometer

Tavčar, Rok (author), Bojkovski, Jovan (author), Beguš, Samo (author)

This article presents a Johnson noise thermometer with a signal acquisition system based on a sound card. The thermometer uses a simple analogue circuit to measure the Johnson noise on a resistor. No external hardware or power supply is necessary, except for a reference multimeter. Data processing is performed in real time on a personal computer using LabView software. The results show that the developed thermometer has an expanded uncertainty (k = 2) of 0.8 °C over a temperature range from − 196 °C to 300 °C, with a measurement time of 5 min.

• Language: English
• Keywords: measurements, practical noise thermometer, sound card
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: 6 str.
• Numbering: Vol. 225, [article no.] 114077
• PID: 20.500.12556/RUL-155831
• UDC: 621.317
• ISSN on article: 1873-412X
• DOI: 10.1016/j.measurement.2023.114077
• COBISS.SI-ID: 193290499
• Publication date in RUL: 22.04.2024

Record is a part of a journal

• Title: Measurement
• Publisher: Elsevier, International Measurement Confederation
• ISSN: 1873-412X
• COBISS.SI-ID: 23272709

Licences

• License: CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
• Link: http://creativecommons.org/licenses/by-nc/4.0/
• Description: A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.

Secondary language

• Language: Slovenian
• Keywords: meritve, praktični šumni termometer, zvočna kartica