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7. To use the scanner, press and hold either one of the SCAN buttons (on the back
panel or on the unit’s side label surface.
8. Data are recorded to the internal memory only when the scan button is released.
9. Once the SCAN button is released, the data must be written to the unit’s internal
memory, so it is recommended that you wait ~1 second or longer before pushing
the scan button again. This allows completion of the data writing cycle.
10. Hold the scanner at a distance from the sample being measured where the two red
light pointer LEDs (illuminators in the scanner’s front panel) intersect to form a
single dot. They intersect at a ~2-inch distance from the front of the scanner. This is
the optimum distance for an accurate reading. Keep the location fixed until the scan
button is released. It is not critical to be extremely precise. The merging of the
targeting red beams serves to provide consistent scans by maintaining an
approximate 2-inch distance.
11. The sensitive portion of the scanner’s beam will be a circle approximately 0.25 inch
[6.4mm] in diameter at distance of 2 inches [51mm] from the front of the optical
head on the front of the device.
12. When the drug is present in concentrations between 0.1% and 1%, the yellow
TRACE indicator LED will illuminate, and the beeper will beep at a slow rate. When
concentrations above 1% are detected, the red POSITIVE indicator LED will
illuminate and the beeper inside the scanner will beep at a faster rate.
13. When the SCAN button is released, data relating to that measurement will be
recorded in the scanner’s internal memory in the following sequence: (1) An initial
complete device diagnostic; (2) the actual reading of a yellow or red positive or a
green negative detection; and (3) a second internal diagnostic. The scan will be
complete in about one second after pressing one of the two SCAN buttons.
14. When the Li-ion battery is discharged, the unit will shut down and require re-
charging via the USB connector. (The low battery indicator will beep twice before
the unit shuts itself off.)
Upon POWER-UP of the device, the rear panel LEDs and beeper indicate the following:
