Emerson Process Management GmbH & Co. OHG
1-18
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
07/2017
1.8 Measurements Specifications
Tab. 1-10:
H
2
S – Standard Measurement Performance Specifications
Special Performance Specifications 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 flow 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 flow
0.2–1.5 l/min.
Influence of gas flow
1 2
< 2%
Maximum gas pressure
10 11
≤ 1500 hPa abs.
(
≤
7 psig)
Influence 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)
Influence 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
Tab. 1-11:
Special Performance Specifications for ULCO and ULCO
2
Hydrogen Sulfide (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
