90
│ 9 Appendix
Carbon monoxide CO
Type
electrochemical sensor (EC)
Use
PM 580/550/500/400
Measuring range
0 – 300 ppm
– lower limit
4 ppm
Resolution
1 ppm
Response times
t
50
< 12 s
t
90
< 25 s
Warm-up time
2 min
Temperature range
-20 – 40 ºC
Measuring error
±3 % or ±3 ppm (±3 digits)
±5 ppm (long-term stability to EN 45544)
Drift
< 10% within 6 months
Zero point deviation 7 ppm
Interference
at 20 ºC
– 400 ppm H
2
:
< 70 ppm
– 20 ppm H
2
S:
< 0.1 ppm
– 100 ppm C
2
H
2
: < 200 ppm
– 400 ppm C
2
H
4
: < 100 ppm
– 100 ppm NO: < 50 ppm
Humidity
5 – 95 % r.h., non-condensing
short term:
0 % r.h.
Lifetime
24 months (36 months expected)
Test gases
– zero point:
clean air
– Sensitivity:
40 ppm CO
setting ranges:
– CO:
10 – 50 ppm
Humidity gas/test gas 5 – 95 % r.h., non-condensing
short term:
0 % r.h.
error:
– 20 – 90 % r.h.: to /4/
Pressure
700 – 1200 hPa
error:
– 800 – 1200 hPa: to /4/
