Emerson X-STREAM Series

Emerson Process Management GmbH & Co. OHG1-12
X-STREAM Non-Incendive
Instruction Manual
HASXENE-IM-EX
12/2014
1.6 Measurements Specifi cations
Tab. 1-5: H2S - Standard Measurement Performance Specifi cations
Tab. 1-6: Special Performance Specifi cations for Gas Purity Measurements (ULCO & ULCO
2
)
Special Performance Specifi cations for Gas Purity Measurements (ULCO & ULCO
2
)
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 fl 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
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 fl ow 0.2–1.5 l/min.
Infl uence of gas fl ow
1 2
< 2%
Maximum gas pressure
10
≤ 1500 hPa abs. (≤ 7 psig)
Infl uence 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)
Infl uence 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
Hydrogen Sulfi de (H
2
S)
Measurement range (sensor dependent) 0 to 50 ppm 0 to 200 ppm 0 to 2000 ppm
Overgas limit 200 ppm 500 ppm 10,000 ppm
Detection limit
1
< 0.2 %
Repeatability
1
< 2 %
Drift
1
< 1 % per month
Response time (t
90
) < 35 s
Operating life > 24 months
Sensor operating temperature -30 to 50 °C
Gas pressure range
800 to 1200 hPa
(-3.1 to 2.7 psig)
Gas humidity range (rel. humidity) 15 to 90 %
Thermostat control none
1
Related to full scale