Technical data

Analyzing the data with the PC
62
14 Analyzing the data with the PC
The data saved by the Wöhler KM 410 can be transferred to the PC and evaluated with
the Wöhler Indoor Air Quality Software.
 Connect the meter to the PC with the USB câble included in the delivery.
 Follow the instructions of the software manual.
15 CO
2
levels and guide lines
Technische Regel für Arbeitsstätten Lüftung ASR A3.6/Januar 2012
(German Technical workplace regulation: ventilation ASR A3.6/january 2012, Ger-
many):
No remedial action will be necessary, if the CO
2
concentration [ml/m
3
] or [ppm] does not
exceed 1000.
NIOSH recommendations (National Institute for Occupational Safety and Health):
250 - 350 ppm: normal outdoor ambient concentrations
1000 ppm indicates inadequate ventilation: complaints such as headaches, fa-
tigue and eye/throat irritation will be more widespread. 1000 ppm
should be used as an upper limit for indoor levels.
ASHRAE Standard 62-1989 (American Society of Heating, Refrigerating and Air-
Conditioning Engineers):
Upper CO
2
limit for indoor levels: 1000 ppm
OSHA (Occupational Safety and Health Administration): 5000 ppm
Time weighted average over five 8-hour work days should not exceed 5000 ppm.
Germany, Japan, Australia, UK: 5000 ppm
Time weighted average over 8 hours should not exceed 5000 ppm.