Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Relative standard and expanded measurement uncertainties (%) for mean particle size results
| Uncertainty component | NTA 2.3 | NTA 3.0 | ||||
|---|---|---|---|---|---|---|
| PSL-46 | PSL-100 | ERM-FD102 (size class B) | PSL-46 | PSL-100 | ERM-FD102 (size class B) | |
| Precision (u prec) | 8.2 | 4.2 | 4.2 | 8.0 | 5.0 | 3.5 |
| Trueness (u t) | 4.0 | 4.0 | 4.0 | 3.9 | 3.9 | 3.9 |
| Expanded (U) | 18.2 | 11.6 | 11.6 | 17.8 | 12.7 | 10.6 |
