User manual

Table Of Contents
Dräger Alcotest 3820 21
Technical data
21
en
Ambient conditions
During operation –5 to +50 °C
10 to 100 % rel. hum.
(non-condensing)
600 to 1300 hPa
During storage –20 to +70 °C
Sampling
Respiratory volume >1.2 litres (preset)
Breath flow >10 l/min (default)
Duration of breath >2 s (default)
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 ‰
0.008 mg/l
1.7 % of the measured value
0.017 ‰ or
1.7 % of the measured value
whichever value is higher
Sensitivity drift Typically 0.4 % of the measured
value per month
Wait time for measurement readiness following a previous
measurement with:
0.25 mg/litre 20 s
0.50 mg/litre 40 s
1.00 mg/litre 80 s
>1.50 mg/litre 120 s
0.50 ‰ 20 s
1.00 ‰ 40 s
2.00 ‰ 80 s
>3.00 ‰ 120 s