348
AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Fidas24, Fidas24 NMHC: Operating specifications
The following data only applies if all the influence variables (e.g. flow, tem-
perature and air pressure) are constant. These apply for the measuring
ranges
≥
50 mg org. C/m
3
; for smaller measuring ranges these only apply if
they set are at the factory per customer order.
Linearity deviation
≤
2 % of the measurement span up to 5000 mg org. C/m
3
,
this value applies in a (calibrated) measuring range
Repeatability
≤
0.5 % of the measuring range
Zero-point and sensitivity
drift
≤
0.5 mg org. C/m
3
per week
Output fluctuation (2
σ
)
≤
0.5 % of span at electronic T90 time = 20 s, not smaller than 10 µg
org. C/m
3
Detection limit (4
σ
)
≤
1 % of span at electronic T90 time = 20 s, not smaller than 20 µg org. C/m
3
Oxygen dependence
≤
2 % of measured value for 0 to 21 vol.% O
2
or
≤
0.3 mg org. C/m
3
, whichever
is greater
Temperature influence
Ambient temperature in permissible range:
on zero point and on sensitivity:
≤
2 % per 10 °C in the measurement range
0 to 15 mg org. C/m
3
Power supply influence
24 V DC ± 5 %:
≤
0.2 % of span or
230 V AC ± 10 %:
≤
of span
T
90
time Fidas24
T
90
< 1.5 s at a sample gas flow rate = 80 l/h and electronic T90 time = 1 s
T
90
time Fidas24 NMHC
T
90
< 2.5 s via bypass, T
90
< 3 s via converter at sample gas flow = 80 l/h and
electronic T90 time = 1 s
Switch-over time
(Fidas24 NMHC)
between bypass and converter typically 20 s, depending on measurement
range
