Alco‐Sensor FST®
Operator's Manual
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4.0 Operate the Alco‐Sensor FST®
4.1 Operational Overview of the ALCO‐SENSOR FST®
It is imperative all ASD operators are able to adequately articulate how the device functions and
to describe the correct sequence of messages displayed by the device, if called upon to give
testimony in court. Although some messages are displayed only very briefly, failure to identify
and articulate these messages can raise concerns about the proper operation of the device.
Commence a test by attaching a clean mouthpiece to the device. Insert the closed end of the
mouthpiece into the mouthpiece channel, with the flat side of the mouthpiece downward and
press the mouthpiece into position. The two holes on the underside of the mouthpiece will
naturally align and attach to the appropriate ports of the Alco‐Sensor FST®.
Press the ON button (labeled with an "I" symbol within a diamond shape) located opposite the
display for about one second so the display illuminates and an audible beep sounds.
The backlight of the display is normally green for all functions but turns an amber color when
displaying a WARN result, or a red color when displaying a FAiL result.
The test sequence starts by briefly indicating the device temperature and battery strength. The
acceptable operating temperature of the device is ‐12°C to 55°C but the test sequence will
automatically end if the temperature is not in the acceptable range or if the batteries are too
weak to complete the test. There is no need to record this temperature.
Following the temperature and battery check, the display will show BlNK and perform a blank
test to demonstrate the alcohol free status of the device. A blank result other than 0 mg% will
generate a status message NULL FAiL and end the test sequence automatically, so there is no
need to record the blank reading. A 0 mg% blank will allow the sequence to continue with WAIT
appearing on the display while the sequence progresses automatically.
A double beep will sound when the device is ready to accept a sample of breath and there will
be a small flashing icon of a person's head in the upper left corner of the display and the
message Blow. The ASD operator should instruct the subject to "take a normal breath in, seal
your lips around the mouthpiece, and blow continuously through the mouthpiece until I tell
you to stop".
Alco‐Sensor FST® Operator's Manual
12 of 30
2018‐12‐18
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