Dräger Alcotest 3820 Gebrauchsanweisung Seite 21

Ambient conditions
During operation
During storage
Sampling
Respiratory volume
Breath flow
Duration of breath
Measurement accuracy
Standard deviation of the repeatability with ethyl alcohol standard
up to 0.50 mg/l
≥0.50 mg/l
up to 1.00 ‰
≥ 1.00 ‰
Sensitivity drift
Wait time for measurement readiness following a previous
measurement with:
0.25 mg/litre
0.50 mg/litre
1.00 mg/litre
>1.50 mg/litre 120 s
20 s
40 s
80 s
–5 to +50 °C
10 to 100 % rel. hum.
(non-condensing)
600 to 1300 hPa
–20 to +70 °C
>1.2 litres (preset)
>10 l/min (default)
>2 s (default)
0.008 mg/l
1.7 % of the measured value
0.017 ‰ or
1.7 % of the measured value
whichever value is higher
Typically 0.4 % of the measured
value per month
0.50 ‰
1.00 ‰
2.00 ‰
>3.00 ‰
Technical data
20 s
40 s
80 s
120 s
en
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