OAR 257-030-0140: Determining Agreement of Breath Samples Within a Testing Sequence

Agreement between two valid breath samples within a testing sequence is established when the subject sample measurements agree within plus or minus ten percent of their mean, inclusive of the upper and lower bounds of the range. If the instrument establishes agreement, the lower breath sample measurement shall be truncated to two decimal places and reported as the chemical test result. If the subject sample measurements do not agree, the instrument will abort the testing sequence and display “Sample Correlation Failure”.