User's Guide

20.
Calibration is a normal part of owning and operating a
professional level breathalyzer. BACtrack recommends
that you calibrate your BACtrack Mobile at least every 6-12
months, depending on the performance you observe and
require. If the product is used every day, it may need to be
recalibrated more frequently.
CALIBRATION INSTRUCTIONS
Contact your app provider for recalibration instructions.