Negative ppm values cannot physically exist but the behavior of the output is defined to
account for cases where a low CO
2
reading, combined with sensor drift, could cause a negative
result.
11.0
10.0
0
0
2000
6000
Output clipping limit
Error level
CO
2
(ppm)
-100
Output
(V)
Scaled output range:
0 ... 10 V
0 ... 2000 ppm
Figure 12 Overrange behavior of CO
2
measurement with 0 ... 10 V output
GMW80 Series User Guide
M211748EN-G
18
