Emerson Process Management GmbH & Co. OHG
1-19
1
Techn. Description
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
07/2017
1.8 Measurements Specifications
Special Performance Specifications for Gas Purity Measurements (Suppressed Ranges)
Tab. 1-12:
Special Performance Specifications for Suppressed Ranges
1
Related to suppressed range (98–100 %)
2
Constant pressure and temperature
3
Daily
zero and span calibration requested
4
Switching from absolute to suppressed range
requires purge time of > 240 s
5
Sample gas pressure sensor mandatory
6
Temperature variation: ≤ 10 K per hour
7
Related to permissible ambient temp. range
Note!
1 psi = 68.95 hPa
98–100 % CO
2
Detection limit (4 σ)
1 2
≤
2 %
Linearity
1 2
≤
1 %
Zero-point drift
1 2 3
≤
2 % per day
Span (sensitivity) drift
1 2 3
≤
2 % per day
Repeatability
1 2
≤
2 %
Response time (t
90
)
4
≤
30 s
Permissible gas flow
in the external sample handling system
a very stable flow has to be generated.
Please C/F factory for details
Permissible
gas pressure
Permissible
gas pressure variation
Influence of ambient pressure change
from 800 to 1100 hPa at constant tem-
perature with pressure compensation
1
5
≤
2 %
Permissible ambient temperature
+15 to +35 °C (59 to 95 °F)
Influence of temperature
1 6
(at constant pressure)
– On zero point
≤
0.5 % per 10 K
– On span (sensitivity)
7
≤
2 %
Thermostat control
60 °C (140 °F)
Warm-up time
approx. 50 minutes
Purge gas (N
2
) flow
approx. 0.1–0.2 l/min
