80
8015383/ZUQ7/V1-3/2020-06 | SICK
O P E R A T I N G I N S T R U C T I O N S | TRANSIC151LP
Subject to change without notice
11
ANNEX
11.2
Influence of background gases on oxygen measurement
Example:
Gas
Coefficient Unit
Acetone/propane (C
3
H
6
O)
−
0.51
% of measured value / (vol% acetone)
Acetylene/ethine (C
2
H
2
)
−
0.47
% of measured value / (vol% acetylene)
Argon (Ar)
+0.12
% of measured value / (vol% argon)
Ethene (C
2
H
4
)
−
0.53
% of measured value / (vol% ethene)
Ethane (C
2
H
6
)
−
0.49
% of measured value / (vol% ethane)
Propane (C
3
H
8
)
−
0.75
% of measured value / (vol% propane)
Butane (C
4
H
10
)
−
1.02
% of measured value / (vol% butane)
1-Butene (C
4
H
8
)
−
0.89
% of measured value / (vol% 1-butene)
Isopentane/2-methyl butane
(C
5
H
12
)
−
0.71
% of measured value / (vol% isopentane)
n-Hexane (C
6
H
14
)
−
0.90
% of measured value / (vol% n-hexane)
Methane (CH
4
)
−
0.30
% of measured value / (vol% methane)
Carbon monoxide (CO)
−
0.06
% of measured value / (vol% CO)
Carbon dioxide (CO
2
)
−
0.15
% of measured value / (vol% CO
2
)
Cyclohexane (C6H12)
−
0.80
% of measured value / (vol% cyclohexane)
Dichloromethane (DCM) CH
2
CL
2
−
0.38
% of measured value / (vol% dichloromethane)
Dimethyl ether (C
2
H
6
O)
−
0.44
% of measured value / (vol% dimethyl ether)
Ethanol (C
2
H
6
O)
−
0.32
% of measured value / (vol% ethanol)
Hydrogen (H
2
)
[1]
[1] The TRANSIC151LP may only be used in zones in which either inflammable or explosive gases in groups I, IIA
and IIB are present.
−
0.48
% of measured value / (vol% hydrogen)
Water (g/m
3
)(H
2
O)
−
0.03
% of measured value / (g/m
3
water)
Helium (He)
+0.26
% of measured value / (vol% helium)
Methyl isobutyl ketone (C
6
H
12
O)
−
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% propanol)
Tetrahydrofuran (C
4
H
8
O)
−
0.58
% of measured value / (vol% tetrahydrofuran)
Toluene (C
7
H
8
)
−
0.74
% of measured value / (vol% toulene)
Xylene (C
8
H
10
)
−
0.62
% of measured value / (vol% C
8
H
10
)
Table 7: 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.
