| Zugriffsnummer | 38422 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Traceability of bridge amplifiers in tared measurement applications |
| Autor(in); Institution |
Brüge, Andreas; 1.2, Festkörpermechanik, PTB-Braunschweig
|
| Quelle/Jahr | IMEKO TC3 Conference 2017: Proceedings:(2017), 5 S. |
| Availability | [online only] |
| URL | |
| Verlag | IMEKO |
| Konferenzangaben | IMEKO TC3, TC5 and TC22 International Conference 2017, Helsinki, 30, May - 01, June, 2017, Finland |
| Freie Schlagworte | voltage ratio ; traceability ; bridge amplifier ; uncertainty ; linearity |
| Zusammenfassung | The influence of the primary voltage ratio standard uncertainty on strain gauge measurements, especially at secondary levels like torque wrench calibration, is discussed. A method is presented to overcome its 1/x behaviour, which affects the uncertainty budget at lower ratios for the usual point-by-point transfer of uncertainty. Monte Carlo simulations of fitted correction values reduce the relative expanded contribution of the traceability uncertainty to less than 1·10-5 for tared measurements with bridge amplifiers in comparison to five times more for point-by-point traceability. Considering typical further uncertainty contributions, a tared measurement of voltage ratios is possible with a combined relative expanded uncertainty of less than 1.8·10-5. |
