HEADER
7
USING THE UNIT
Understanding the results
The BAC (Blood Alcohol Concentration)
represents the amount of ethyl alcohol in a
given volume of blood. For instance, having
a %BAC of 0.10 means that a person has
1 part alcohol per 1,000 parts blood in the
body.
The most commonly used measurements
are grams of ethanol per milliliter of blood
(g/ml), used in the United States (also
expressed as %BAC) and milligrams of etha-
nol per milliliter of blood (mg/ml), used in
much of Europe (also expressed as prom-
ille).
For example, a reading of 0.05 %BAC on
the
AlcAlert
is the same as 0.05 g/ml or 50
mg/ml or 0.5 g/l or 0.5 promille.
Additional information:
• The normal warm-up countdown is from
6-to-0. However, if it has been more
than 1 hour since the last operation, the
unit begins a 14-to-0 warm-up count-
down.
The sensor must be warmed up prop-
erly to report accurate readings. There-
fore, for maximum accuracy, each time
you start to use the unit after it has
