Emerson X-STREAM XE - Page 97

Emerson Process Management GmbH & Co. OHG 3-23
X-STREAM XE
Instruction Manual
HASXEE-IM-HS
10/2012
3
Measuring Principles
Tab. 3-12: Oxygen - Standard and Enhanced Measurement Performance Specications
3.6 Measurement Specications
1
Related to full scale
2
Related to measuring value
3
From gas analyzer inlet at gas ow of 1.0 l/min
(electronic damping = 0 s)
4
Constant pressure and temperature
5
Range 0–10…200 ppm: ≤ 5 % (5 to 45 °C /
41 to 113 °F)
6
Pressure sensor is required
7
Limited to atmospheric if internal sample pump
8
Temperatures below 0 °C (-4 °F) with thermostat
control only
9
Thermost. controlled sensor: 35 °C (95 °F)
10
For ranges 0–5…100 % and ow 0.5…1.5 l/min
11
Optional thermostatically controlled sensor with
temperature 60 °C (140 °F)
12
Temperature variation: ≤ 10 K per hour
13
No sudden pressure surge allowed
14
Special conditions apply to model XEFD
Oxygen Sensors
Paramagnetic (pO
2
) Electrochemical (eO
2
) Trace (tO
2
)
Standard Spec Enhanced Spec
Detection limit (4 σ)
1 4
≤ 1 % ≤ 0.5 % ≤ 1 % ≤ 1 %
Linearity
1 4
≤ 1 % ≤ 1 % ≤ 1 %
Zero-point drift
1 4
≤ 2 % per week ≤ 1 % per week ≤ 2 % per week ≤ 1 % per week
Span (sensitivity) drift
1 4
≤ 1 % per week ≤ 0.5 % per week ≤ 1 % per week ≤ 1 % per week
Repeatability
1 4
≤ 0.5 % ≤ 1 % ≤ 1 %
Response time (t
90
)
3
< 5 s approx. 12 s 20 to 80 s
Permissible gas ow 0.2–1.5 l/min 0.2–1.5 l/min. 0.2–1.5 l/min.
Inuence of gas ow
1 4
≤ 2 %
10
≤ 2 % ≤ 2 %
Maximum gas pressure
7 14
≤ 1500 hPa abs. (≤ 7 psig)
13
≤ 1500 hPa abs. (≤ 7 psig) ≤ 1500 hPa abs. (≤ 7 psig)
Inuence of pressure
2
– At constant temperature ≤ 0.10 % per hPa ≤ 0.10 % per hPa ≤ 0.10 % per hPa
– With pressure compensation
6
≤ 0.01 % per hPa ≤ 0.01 % per hPa ≤ 0.01 % per hPa
Permissible ambient temperature
8
0(-20) to +50 °C (32 (4) to 122 °F) 5 to +45 °C (41 to 113 °F) 5 to +45 °C (41 to 113 °F)
Inuence of temperature
1 12
(at constant pressure)
– On zero point ≤ 1 % per 10 K ≤ 0.5 % per 10 K ≤ 1 % per 10 K ≤ 1 % per 10 K
5
– On span (sensitivity) ≤ 1 % per 10 K ≤ 1 % per 10 K ≤ 1 % per 10 K
5
Thermostat control 60 °C (140 °F)
11
none none
9
Warm-up time Approx. 50 minutes - Approx. 50 minutes
Note! 1 psi = 68.95 hPa
Note! Take care of the tO
2
sensor‘s documentation, providing important calibration instructions!
Hydrogen Sul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
Tab. 3-13: H
2
S - Standard Measurement Performance Specications
1
Related to full scale
Note! These sensors require oxygen and moisture to work properly within given specications!
Take care of the separate documentation accompanying the sensors!