Mich. Admin. Code R. 325.2656a

Current through Vol. 24-21, December 1, 2024

Section R. 325.2656a - Equipment Accuracy - Preliminary Breath Test Instrument

Rule 6a. An appropriate class operator who has been certified in accordance with R 325.2658 shall verify for accuracy a preliminary breath alcohol test instrument at least monthly, or more frequently as the department may require. The test for accuracy must be made using an alcohol standard that is approved by the department. For the preliminary breath alcohol test instrument to meet the requirements for accuracy, a test result not exceeding +/- 5% must be obtained when using a controlled device. Controlled devices include both of the following:

(a) A wet bath device that delivers an alcohol vapor concentration of 0.080 grams of alcohol per 210 liters of vapor.

(b) A compressed alcohol gas device that delivers a test result of 0.080 grams of alcohol per 210 liters of vapor before applying applicable altitude or topographic evaluation correction factor supplied by the manufacturer. The correction factor may be applied by the operator or by the preliminary breath alcohol test instrument calibration station, if pre-programmed.

Mich. Admin. Code R. 325.2656a

2023 MR 10, 5/22/2023