Table 5
Connection of the limits of dT or 
and CF for the accuracy classes (Acc.).
| Acc. | Unc. | dT or  (%) |
CF | N | Nacc. | |||
|---|---|---|---|---|---|---|---|---|
| (%) | (%) | g1 | g2 | g3 | g4 | |||
| A | ≤3 | ≤3 | ≥0.1 | 80 | 0 | 0 | 0 | 80 |
| B | ≤10 | >3 & ≤10 ≤3 | ≥0.1 <0.1 | 125 | 0 | 0 | 41 | 84 |
| C | ≤25 | >10& ≤25 >3 & ≤10 | ≥0.1 <0.1 | 317 | 70 | 111 | 134 | 2 |
| D | ≤50 | >25 & ≤50 or >10& ≤25 | ≥0.1 <0.1 | 269 | 110 | 20 | 19 | 0 |
| E | >50 | >50 >25 & ≤50 | <0.1 | 198 | 46 | 16 | 27 | 0 |
Notes. N is the total number of computed transitions belonging to a specific accuracy class obtained from the 
indicator. Nacc. is the number of transitions belonging to a specific accuracy class in each transition group defined in Table 4. Note: the CF in the Babushkin gauge is used in this statiscal analysis. The A, B, C, D, and E classes include, respectively, the {A, A+, and AA}, {B+ and B}, {C+ and C}, {D+ and D}, and E classes as defined by the NIST-ASD. The corresponding uncertainty (Unc.) limits are shown in the second column.
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