The device is pressure sensitive. If the device does not detect the desirable amount of pressure ( due to excess temperature,
pressure variance due to an incorrect blow) a “Non-human breath! Test Failed!” caption will display on the units screen.
This will not result in a violation, but the operator will have to retest until test is accepted.
Figure 3: Irregular blow
With a correct blow, the status bar on the screen will display the progress. When the test is completed, the user will hear
the air pump extracting the air. The user can stop blowing at this time. The process will move to the next step.
Figure 4: Regular blow
