Recommended Fixed Performance Limits
| Analyte | Recommended Limits |
| pH | Peer Group +/- 0.017 |
| PCO2 | Peer Group +/- 6% or 3 mmHg, whichever is greater |
| PO2 | Peer Group +/- 6% or 4 mmHg, whichever is greater |
| S02% | Peer Group +/- 3% |
| Hematocrit | Peer Group +/- 2 Hct units |
| Hemoglobin | Peer Group +/- 0.6 g/dL |
| Sodium | Peer Group +/- 3 mmol/L |
| Potassium | Peer Group +/- 0.25 mmol/L |
| Chloride | Peer Group +/- 4 mmol/L |
| Total Calcium | Peer Group +/- 6% or 0.20 mmol/L |
| Ionized Calcium | Peer Group +/- 6% or 0.06 mmol/L, whichever is greater |
| Ionized Magnesium | Peer Group +/- 10% or 0.03 mmol/L, whichever is greater |
| BUN | Peer Group +/- 8% or 2 mg/dL, whichever is greater |
| Glucose | Peer Group +/- 8% or 5 mg/dL, whichever is greater |
| Lactate | Peer Group +/- 6% or 0.3 mg/dL |
| Creatinine | Peer Group +/- 12% or 0.3 mmol/L, whichever is greater |