RI Breathalyzer Calibration

The state cannot use the breath test result against you. The case may still proceed under the impairment theory using officer observations and field sobriety test performance - but losing the per se evidence often collapses the strongest part of the prosecution's case.

A deficient sample indicator means the breath sample volume or flow rate did not meet the machine's minimum threshold. A deficient sample reading is not admissible as evidence of a specific BAC.

Yes. Calibration logs, operator certification, and procedural compliance are all subject to subpoena and challenge. A successful suppression motion eliminates the breath test result from the case.

The Department of Health prescribes the calibration interval. Routine calibration verification typically occurs every 30 days, with full re-certification on a longer cycle. The exact schedule is set by Department of Health regulations.

The Intoxilyzer 9000 is rated at ±5% accuracy when properly calibrated and operated. Deviations from calibration, operator error, or sample contamination can produce readings significantly outside that range.