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Emerson Process Management GmbH & Co. OHG1-18
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
03/2012
1.8 Measurements Specications
Special Performance Specications for Gas Purity Measurements (ULCO & ULCO
2
)
Tab. 1-10: Special Performance Specications for Gas Purity Measurements
1
Related to full scale
2
Constant pressure and temperature
3
Within 24 h; daily zero calibration requested
4
Within 24 h; daily span calibration recommended
5
Related to measuring value
6
Temperature variation: ≤ 10 K per hour
7
From gas analyzer inlet at gas ow of 1.0 l/min
8
Barometric pressure sensor is required
9
Whichever value is higher
10
Limited to atmospheric if internal sample pump
11
Special conditions apply to pressures above
1100 hPa
(1.5 psig) up to 1500 hPa (7 psig)
0–10…< 50 ppm CO
0–5…< 50 ppm CO
2
Detection limit (4 σ)
1 2
<
2 %
Linearity
1 2
< 1 %
Zero-point drift
1 2 3
< 2 % resp. < 0.2 ppm
9
Span (sensitivity) drift
1 2 4
< 2 % resp. < 0.2 ppm
9
Repeatability
1 2
< 2 % resp. < 0.2 ppm
9
Response time (t
90
)
7
< 10 s
Permissible gas ow 0.2–1.5 l/min.
Inuence of gas ow
1 2
< 2%
Maximum gas pressure
10 11
≤ 1500 hPa abs.
(≤ 7 psig)
Inuence of pressure
5
– At constant temperature ≤ 0.1 % per hPa
– With pressure compensation
8
≤ 0.01 % per hPa
Permissible ambient temperature +15 to +35 °C (59 to 95 °F) +5 to +40 °C (41 to 104 °F)
Inuence of temperature
6
(at constant pressure)
– On zero point < 2 % per 10 K resp. < 0.2 ppm per 10 K
9
– On span (sensitivity) < 2 % per 10 K resp. < 0.2 ppm per 10 K
9
Thermostat control none 60 °C (140 °F)
Note! 1 psi = 68.95 hPa