Intoximeters Alco-Sensor FST Operator's Manual page 21

Alco‐Sensor FST®
4. Breath Sampling:
In order for the device to accept a sample, the breath test subject must blow with a minimum
flow rate, produce a minimum volume of breath, and blow over a minimum period of time.
Once these criteria have been met by the breath test subject, the sample will be accepted and
analyzed by the device.
If the subject stops blowing before the minimum sampling requirements are met, then no
sample will be taken for analysis. This will be indicated by beep warnings and alternating
messages on the display. In such a case, depending on the circumstances, the subject may be
offered another attempt to provide an adequate sample. When Blow comes back on the
display, you may proceed by telling the subject to blow again.
The following status messages may be displayed with inadequate samples of breath:
Flow LOW means the subject did not provide a constant breath flow above
the minimum flow rate required.
The subject is given three attempts to provide an adequate sample before
the test is aborted.
Solution: Instruct the subject to provide a continuous sample with a
moderate rate of breath flow.
Alco‐Sensor FST® Operator's Manual
When ready for a sample of breath, the display shows the icon of a
person's head flashing and Blow. A double beep will be heard when this
appears on the display. Instruct the subject to take a normal breath in
and then blow steadily through the mouthpiece until you tell them to
stop.
"take a normal breath in, seal your lips around the mouthpiece, and blow
continuously through the mouthpiece until I tell you to stop".
Once the subject starts to blow with sufficient flow, the icon of the head
will stop flashing and a dash will appear to the right of the head.
Additional dashes will appear as the subject continues to provide a
sample. A continuous tone will be heard as the subject is blowing.
Once three dashes appear a sample will be taken. It is not necessary for
the subject to blow hard, but rather a steady and continuous sample is
best for successful sample collection. The subject has up to three (3)
minutes and/or three (3) attempts in which to provide a suitable sample
once the Blow message is displayed.
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Operator's Manual
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