Emerson Rosemount X-Stream Series, Instruction Manual

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Emerson Process Management GmbH & Co. OHG
3-17
X-STREAM XE
Instruction Manual
HASXEE-IM-HS
10/2012
3
Measuring Principles
3.4 Trace Moisture Measurement
3.4.2 Accompanying Gases
Component
Maximum Permitted
Concentration / ppm
Maximum Permitted Dew-
point / °C
Acetylene (Ethyne) C
2
H
2
1
-20
Ammonia NH
3
1000 -20
Aromatic alcohols no limit no limit
Benzene C
6
H
6
no limit no limit
Bromine Br
2
no limit -20
Carbon dioxide CO
2
no limit no limit
Carbon disulphide
CS
2
no limit no limit
Carbon monoxide CO
no limit no limit
Carbon tetrachloride
CCl
4
no limit no limit
Carbon tetrafluoride
CF
4
no limit -20
Chlorine Cl
2
not permitted
Dichlorodifluoromethane
CCl
2
F
2
no limit -20
Ethane C
2
H
6
no limit no limit
Ethylene (Ethene) C
2
H
4
no limit no limit
Ethylene oxide CH
4
O
not permitted
Exhaust gases no limit no limit
Fluorine F
2
10 -20
Glycol (Ethane-1,2-diol)
HOCH
2
CH
2
OH
no limit no limit
Halogenated hydrocarbons
Consult with Emerson
Hydrobromic acid
HBr not permitted
Hydrochloric acid HCl not permitted
2
Hydrofluoric acid
HF 500 -20
Hydrogen peroxide H
2
O
2
not permitted
Hydrogen sulphide H
2
S no limit 3 no limit
Mercury Hg not permitted
4
Methane CH
4
no limit no limit
Methanoic acid
HCOOH
not permitted
Methanol CH
3
OH
5 no limit
Methylethyl glycol C
4
H
11
O
no limit no limit
Natural gas no limit no limit
Nitric acid
HNO
3
10 -20
Nitrogen dioxide
NO
2
no limit -20
Nitrous oxide N
2
O
no limit -20
Tab. 3-7: Limitations on Gases
Several gases may affect the sensor, so consider the following limits:
(I)