A calibration procedure for dc resistance ratio bridges |
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| Martina Marzano, Cristina Cassiago, Vincenzo D’Elia, Enrico Gasparotto, Luca Callegaro |
- Abstract:
- Current comparator bridges are nowadays widespread for the realisation of the resistance unit with the quantum Hall effect and of a midrange resistance scale in most national metrology institutes. Future quantum resistance standards, e.g. those based on novel device materials and tabletop dry cryostats, make the more achievable DC currrent comparator bridges (DCCs) the most viable alternative with respect to the more accurate but more expensive cryogenic current comparator bridges (CCCs). A calibration of the individual DCC ratios of interest by comparison with a reference CCC is a straightforward way to improve the DCC performances. The paper reports a calibration exercise on the ratio 12.9064 kΩ : 1 kΩ, chosen as a benchmark since 12.9064 kΩ is close to the quantized resistance value. A more complete dataset involving also decadal resistance ratios will be presented at the Conference, together with a full evaluation of the calibration uncertainty.
- Keywords:
- calibration, dc, resistance ratio bridges
- Download:
- IMEKO-TC4-2023-08.pdf
- DOI:
- 10.21014/tc4-2023.08
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 Symposium 2023
- Title:
26th IMEKO TC4 Symposium and 24th International Workshop on ADC and DAC Modelling and Testing (IWADC)
- Place:
- Pordenone, ITALY
- Time:
- 20 September 2023 - 21 September 2023