of test, then this can be changed by pressing the Down Button (DB) under
the down arrow.
STEP 3 – Function selection
Press and release the Down Button (DB), and the operator can scroll
through the different test modes that the instrument can carry out. Scroll
through the menu and then use the test option that is required: there are
three possible options: Mouthpiece, Cup and Sniffer.
Breath Test
Mouthpiece test, gives a quantitative result,
which the user interprets as being within limits.
Manual sampling can be used.
Cup Test
The cup must be fitted onto the instrument,
and the subject instructed to blow into the cup.
The sampling can be either manual or
automatic. This test will give either a pass or
fail result.
Sniffer Test
The sniffer test allows the operator to take a
sample of air from the environment around the
subject, or around a suspicious liquid. The
sniffer test will only take a small sample of the
air and can be affected by environmental
conditions, particularly wind. When using the
sniffer test it is recommended that the
instrument be held as close to the subject’s
mouth or the liquid as possible.
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