BS ISO 27893:2011
$142.49
Vacuum technology. Vacuum gauges. Evaluation of the uncertainties of results of calibrations by direct comparison with a reference gauge
| Published By | Publication Date | Number of Pages |
| BSI | 2011 | 24 |
This International Standard gives guidelines for the determination and reporting of measurement uncertainties arising during vacuum gauge calibration by direct comparison with a reference gauge carried out in accordance with ISO/TS 3567.
This International Standard describes methods for uniform reporting of uncertainties in vacuum gauge certificates. Uncertainties reported in accordance with the guidelines given in this International Standard are transferable in the sense that the uncertainty evaluated for one result can be used as a component in the uncertainty evaluation of another measurement or calibration in which the first result is used.
This International Standard defines two measurement models that are sufficient to cover most practical cases. However, it is possible that the models given cannot be applied to newly developed vacuum gauges.
The final uncertainty to be reported in a certificate is evaluated from the uncertainties of the input quantities and influence quantities. The principal quantities that can affect the result of a vacuum calibration are described; however, a complete list of the possible quantities that can have an influence on the final result lies outside the scope of this International Standard.
NOTE It is envisaged that future Technical Specifications will address the calibration of specific types of vacuum gauges.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | 1 Scope 2 Normative references |
| 8 | 3 Terms and definitions |
| 9 | 4 Symbols and abbreviated terms 5 Basic concept and model 5.1 General |
| 10 | 5.2 Sum model 5.3 Quotient model |
| 11 | 5.4 Combination of the two models 6 Calculation of uncertainty in the sum model 6.1 Total uncertainty — Sum model |
| 12 | 6.2 Uncertainty contributions due to reference standard |
| 13 | 6.3 Uncertainty contributions due to unit under calibration |
| 14 | 6.4 Uncertainty contributions due to calibration method or calibration conditions 6.5 Coverage factor |
| 15 | 7 Calculation of uncertainty in the quotient model 7.1 Total uncertainty — Quotient model 7.2 Uncertainty contributions due to reference standard |
| 16 | 7.3 Uncertainty contributions due to the unit under calibration |
| 17 | 7.4 Uncertainty contributions due to calibration method or calibration conditions |
| 18 | 7.5 Coverage factor |
| 19 | 8 Combination of the sum and quotient model for error of reading 9 Reporting uncertainties 9.1 Uncertainty budget |
| 20 | 9.2 Calibration certificate |
