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3.3.3.4 Warning Set Point
The default warning levels for the sensors are:
–
–
–
Setting a warning level of 0 (zero) will disable warning detection for this particular sensor.
3.3.3.5 Range
The range for each sensor is the gas concentration that corresponds to the 20 mA signal level.
The default range values for the sensors are:
–
–
–
Revision 0.07
S e n s o r
W a r n i n g :
Figure 3-27 Sensor's Warning Level
Carbon Monoxide
50 ppm
Nitrogen Dioxide
3.0 ppm
Combustible
2,000 ppm (5% LEL for methane)
S e n s o r
R a n g e :
Figure 3-28 Sensor's Range
Carbon Monoxide
200 ppm
Nitrogen Dioxide
6.0 ppm
Combustible
10,000 ppm (25% LEL for methane)
0 1
C O
_ _ 5 0 p p m
0 1
C O
_ 2 0 0 p p m
25
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