| Author(s): |
Christopher W. Meyer; W Wyatt Miller; Dean C. Ripple; Gregory E. Scace; |
| Title: |
Uncertainty Budget for the NIST Hybrid Humidity Generator |
| Published: |
December 01, 2012 |
| Abstract: |
We provide here a detailed uncertainty budget for the new Hybrid Humidity Generator (HHG) that has been constructed at the National Institute of Standards and Technology (NIST). The HHG generates frost/dew points from –70 °C to +85 °C using calibration gas flows up to 150 L/min. For frost/dew points above –15 °C, the two-pressure method is employed, and for frost points at or below –15 °C, the divided-flow method is used (hence the name “hybrid”). The total expanded (k=2) uncertainty is estimated for HHG generation of the following quantities: frost/dew point, mole fraction, and relative humidity. The total uncertainty is estimated separately for the two-pressure and divided-flow methods. |
| Citation: |
International Journal of Thermophysics |
| Volume: |
33 |
| Issue: |
8 |
| Pages: |
pp. 1488 - 1499 |
| Keywords: |
humidity; generator; standards; saturator; calibration; hygrometer; uncertainty; water vapor |
| Research Areas: |
Weights & Measures, Calibrations (Thermodynamic) |
| DOI: |
10.1007/s10765-010-0880-z (Note: May link to a non-U.S. Government webpage) |
| PDF version: |
 Click here to retrieve PDF version of paper (804KB) |
