Alcohawk Micro Manuale d'uso - Pagina 3

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INTRODUCTION

Overview of the Alcohawk

The Alcohawk

Micro is a breath alcohol tester designed to test for the

presence of alcohol in the blood. This device provides a digital reading

of an individual's approximate blood alcohol concentration (BAC) in

seconds. The Alcohawk

Micro is powered by one AAA battery that

generally lasts between 200-300 tests.

To fully utilize this device to its potential, we recommend reading this

entire manual. Enjoy your Alcohawk

Alcohol Testing Theory

Ethyl alcohol is detectable in the breath because it is absorbed from

the mouth, throat, stomach and intestines into the bloodstream. When

blood ﬂows through the lungs, some of the alcohol passes across the

membranes of tiny lung air sacs (alveoli) into the air. The concentration

of the alcohol in the alveolar air is proportional to the alcohol in the

blood. As the alcohol in the alveolar air is exhaled, it can be screened

by a breath alcohol testing device. Rather than drawing a subject's

blood to test for alcohol level, a subject's breath can be tested using a

breath alcohol testing device. Because breath alcohol concentration

is proportional to blood alcohol concentration (BAC), BAC can be

calculated by measuring alcohol content on the breath. The ratio

of breath alcohol to blood alcohol is 2,100:1. This means that 2100

milliliters of alveolar air will contain the same amount of alcohol as

1 millimeter of blood. This concept is well established by Henry's

Law, which states that the concentration of a volatile substance in

the air above a ﬂuid is proportional to the concentration of the volatile

substance in the ﬂuid.

Micro

and please do not drink and drive!

When performing a breath alcohol test, it is necessary to analyze an

alveolar or deep lung air sample. If the test sample is not based on a

deep lung sample, the sample analyzed could be diluted with breath of

lower alcohol concentration from the upper respiratory tract. This would

result in a lower than optimum test result. As a result, breath alcohol

testers listed on the Department of Transportation (DOT), National

Highway Trafﬁc Safety Administration's (NHTSA) Conforming Products

List of Screening Devices To Measure Alcohol in Bodily Fluids, typically

have protocols which require the subject to deliver at least 1.5 liters, or

continuous blowing into the unit for least ﬁve (5) seconds.

Federal Register: May 4, 2001 (Volume 66, Number 87)

Description Of Testing System

This device contains a sensor chip designed to test for the presence of

alcohol. A thick ﬁlm heater is printed on the reverse of the chip placed

in the plastic housing. The metal oxide material is heated to a speciﬁc

temperature. The resistance of sensing material changes rapidly

according to gas concentration changes, thereby enabling the reading

of alcohol concentration by resistance measurement. This alcohol

concentration is directly related (as explained in the above paragraph)

to the concentration of alcohol in the blood. Therefore, this device can

give a reading that reﬂects an estimate of the concentration of alcohol in

the blood.

Dose-speciﬁc Effects Of Alcohol Intoxication

The effects of alcohol intoxication are greatly inﬂuenced by individual

variations among users, as well as other factors such as altitude and

air temperature. The following are general dose-speciﬁcs effects of

alcohol, although some users may become intoxicated at a much lower

BAC than shown below. Because a safe reading on a breath alcohol

screener does not mean that a driver's reaction times can respond to

any emergency encountered, do not drink alcohol and drive.