Functional principle of the CTU
CTU 2xxx series
en-US
Page 24 / 108
BeWa CTU2000 3160738h en-us 2018-11-15.docx
2018-11-15
Achievable negative control values
The achievable blank (negative control value) readings strongly depend on
the ambient conditions and frequency of use. Experience shows that the
following negative control value readings may be obtained:
Ambience
CTU
2000
CTU
2200
CTU
2400
Clean room
0.4 … 0.6 0.4 … 0.7 0.6 … 1.0
Laboratory
0.5 … 0.8 0.5 … 0.9 0.6 … 1.4
Separate sampling room
0.5 … 1.0 0.5 … 1.1 0.8 … 1.6
Factory hall
0.8 … 1.2 0.8 … 1.4 3.0 … 5.0