The proper calibration of your Alco-Sensor is important in order to maintain confidence in the test results. When performing testing under Dept. of Transportation regulations, DOT mandates that a calibration adjustment be conducted following a failed accuracy check. When calibration adjustments and accuracy checks are not properly conducted and documented, it may be difficult to enforce subsequent consequences. Therefore, proper calibration plays a crucial role in the alcohol testing process. Knowing how to successfully troubleshoot calibration conundrums is vital.