105
8014084/ZWT7/V3-1/2020-06 | SICK
O P E R A T I N G I N S T R U C T I O N S | TRANSIC111LP
Subject to change without notice
ANNEX
11
11.2
Influence of background gases on oxygen measurement
Example:
Gas
Coefficient Unit
Acetone (C
3
H
6
O) (vol%)
−
0.51
% of measured value/ (vol% acetone)
Acetylene (C
2
H
2
)
−
0.47
% of measured value / (vol% acetylene)
Ar (vol%)
0.12
% of measured value / (vol% Ar)
C
2
H
4
(ethylene)
−
0.53
% of measured value / (vol% C
2
H
4
)
C
2
H
6
(ethane (vol%)
−
0.49
% of measured value / (vol% C2H6)
C
3
H
8
(propane (vol%)
−
0.75
% of measured value / (vol% propane)
C
4
H
10
(butane (vol%)
−
1.02
% of measured value / (vol% butane)
C4H8 (1-butene)
−
0.89
% of measured value / (vol% 1-butene)
C5H12 (isopentane, 2-methyl
butane)
−
0.71
% of measured value / (vol% isopentane)
C6H14 (N hexane)
−
0.90
% of measured value / (vol% C6H14)
CH4 (vol%)
−
0.30
% of measured value / (vol% CH4)
CO (vol%)
−
0.06
% of measured value / (vol% CO)
CO2 (vol%)
−
0.15
% of measured value / (vol% CO
2
)
Cyclohexane (C6H12)
−
0.80
% of measured value / (vol% C
6
H
12
)
Dichlormethane (DCM) CH
2
CL
2
−
0.38
% of measured value / (vol% CH
2
CL
2
)
Dimethyl ether
−
0.44
% of measured value / (vol% Dimethyl ether)
Ethanol (C
2
H
6
O) (vol%)
−
0.32
% of measured value / (vol% ethanol)
H
2
(vol%)
−
0.48
% of measured value / (vol% H
2
)
H
2
O (g/m
3
)
−
0.03
% of measured value / (g/m
3
H
2
O)
He (vol%)
+0.26
% of measured value / (vol% He)
Methyl isobutyl ketone
−
0.88
% of measured value / (vol% methyl isobutyl
ketone)
NOVEC71
−
0.61
% of measured value / (vol% NOVEC71)
Propanol (C
3
H
8
O)
−
0.41
% of measured value / (vol% C
3
H
8
O)
Tetrahydrofuran
−
0.58
% of measured value / (vol% Tetrahydrofuran)
Toluene (vol%)
−
0.74
% of measured value / (vol% toluene)
Xylene (C
8
H
10
)
−
0.62
% of measured value / (vol% C
8
H
10
)
C
2
H
4
(ethylene)
−
0.53
% of measured value / (vol% C
2
H
4
)
Acetone (C
3
H
6
O) (vol%)
−
0.51
% of measured value/ (vol% acetone)
Acetylene (C
2
H
2
)
−
0.47
% of measured value / (vol% acetylene)
Table 15: Influence of background gases on oxygen measurement
Gas mixture:
10% O
2
(all concentrations in vol%)
20% CH
4
20% C
2
H
6
50% N
2
Relative error:
-0.3 x (20% CH
4
) + -0.49 x (20% C
2
H
6
) = -15.8%
Absolute error:
10% O
2
x -0.158 = -1.58% O
2
TRANSIC100LP reading:
8.42 %
●
An up-to-date Table
“Influence of background gases on oxygen measurement”
can
be requested from SICK Service.
●
If you have questions concerning further background gases not listed here, please
contact Sick Service.
