Table 5.
Parameters used in the calculation of the blackbody quality and uncertainty using Eq. (1) and Eqs. (8) and (9).
| ΔT (mK) | Standard uncertainty u(ΔT)a (mK) | Restrictions (K) |
|---|---|---|
| +0.9 | 5.3 | T0 = 278 |
| +0.5 | 4.9 | T0 = 283 |
| 0.0 | 3.7 | T0 = 293 |
| −0.5 | 3.5 | T0 = 303 |
| −1.1 | 3.8 | T0 = 313 |
| −1.7 | 4.9 | T0 = 323 |
| −2.4 | 6.1 | T0 = 333 |
| −3.2 | 7.0 | T0 = 343 |
| −4.0 | 7.3 | T0 = 353 |
| −4.9 | 7.8 | T0 = 363 |
|
| ||
| ϵ | Standard uncertainty u(Δϵ) | Restrictions |
|
| ||
| 0.9997 | 0.0003 | No aperture |
| 0.99997 | 0.00003 | 50 mm aperture |
a
These values are only valid when viewing the conical section of the cavity.