5
– Maintenance
49
Gas
Molecular
formula
LEL
1
LSE
2
Vapor
density
Coef. /
CH
4
.
Recom-
mended
calgas
Abbreviation
(French)
Acetone
C
3
H
6
O
2.15 %
13 %
2.1
1.7
But/Prop
ACO
Acetylene
C
2
H
2
1.5 %
100 %
0.9
1.3
But/Prop
ACY
Butane
C
4
H
10
1.5 %
8.5 %
2.0
2.13
But/Prop
BUT
Ethanol
C
2
H
6
O
3.3 %
19.0 %
1.6
1.5
But/Prop
ETA
Ethylene
C
2
H
4
2.7 %
34.0 %
0.98
1.3
But/Prop
ETY
G.P.L.
Prop+But
1.65 %
9.0 %
1.85
1.9
But/Prop
GPL
Natural gas
CH4
5.0 %
15.0 %
0.55
1.05
CH4
GNT
Hexane
C6H14
1.2 %
7.4 %
3.0
3.6
But/Prop
HEX
Hydrogen
H2
4.0 %
75.6 %
0.069
0.89
But/Prop
H2
Isopropanol
C3H8O
2.15 %
13.5 %
2.1
1.6
But/Prop
ISP
Methane
3
CH4
5.0 %
15.0%
0.55
1.00
CH4
CH4
4.4 %
1.14
Methanol
CH3OH
5.5 %
44.0 %
1.1
1.25
But/Prop
MTL
Pentane
C
5
H
12
1.4 %
8.0 %
2.5
2.08
But/Prop
PNT
Propane
C
3
H
8
2.0 %
9.5 %
1.6
1.77
But/Prop
PRO
Propylene
C
3
H
6
2.0 %
11.7 %
1.5
1.2
But/Prop
PRY
Toluene
C
7
H
8
1.2 %
7.0 %
3.1
2.1
But/Prop
TOL
Xylene
C
8
H
10
1.0 %
7.6 %
3.7
2.5
But/Prop
XYL
List of pre-programmed combustible gases with coefficients
(1) Lower flammable limit.
(2) Upper flammable limit.
(3) The LEL adopted value for methane varies by country. The monitor integrates two different LEL values for
CH4 (4.4% vol. and 5.0% vol.)
Sensor calibration menu
Calibration consists of a zero adjustment in clean air (free from any gases that could be
detected by the gas monitor), as well as a sensitivity adjustment using calibration gas
of concentration between 15% and 100% of the full sensor range. Test gas shall be
applied at a 60 liters per hour flow rate.
Summary of Contents for BM 25A/AW
Page 1: ...BM 25A AW Area Gas Monitor Part Number NP25AEN Version C 4 User Manual ...
Page 10: ...10 BM 25A AW Instruction Manual Product Overview Figure 2 Product Overview ...
Page 18: ...18 BM 25A AW Instruction Manual ...
Page 34: ...34 BM 25A AW Instruction Manual ...
Page 70: ...70 BM 25A AW Instruction Manual ...
Page 75: ...9 Special Instructions 75 CSA Control Drawing for BM 25A AW Connections ...
Page 78: ...78 BM 25A AW Instruction Manual ...