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REF: WM4 User Manual V7.docx
Page 15
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4.2
Analysing the breath sample
The instrument will perform an analysis and then display the result.
If the BAC detected is zero, the display will be green; from 0.001 to 0.050g/100ml, the
display will be orange and for readings above 0.050g/100ml, the display will be red.
The result will continue to be displayed while the instrument resets itself ready for the next
test. For zero readings this will typically be about five seconds.
4.3
Invalid sample
The invalid blow screen is displayed if the user stops blowing before 1.2 litres is recorded,
they blow too softly, blow too hard or for not long enough.
If the blow is invalid, cease blowing, wait until the Insert Straw and Blow screen is displayed
and then provide another sample.