Emerson NGA2000 PMD ユーザーズマニュアル
Instruction Manual
760007-A
July 2003
July 2003
3-10 Operation Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA2000 PMD
In two limiting cases, the general equation is reduced to simpler forms.
1. If the span standard gas is 100% oxygen, the adjusted oxygen value is the same as the true value (i.e.,
100% O
2
).
2. If the zero standard is an oxygen-free zero gas, the adjusted value for setting the ZERO Control =
BGGst-BGGs. (If the oxygen-free zero gas is more diamagnetic than the background gas in the sam-
ple, this difference is negative. The negative value may be entered in the Calibration Gas List.)
ple, this difference is negative. The negative value may be entered in the Calibration Gas List.)
Alternately, the user can avoid these compensation calculations by using zero and span gases which have
been specially prepared to contain the expected amounts of background gas. Calibration of the analyzer
module will then factor in background gas effects in the same proportions as normal run mode measure-
ment.
been specially prepared to contain the expected amounts of background gas. Calibration of the analyzer
module will then factor in background gas effects in the same proportions as normal run mode measure-
ment.
GAS
EQUIV. % AS O
2
GAS
EQUIV. % AS O
2
Acetylene, C
2
H
2
-0.612
Hydrogen Bromide, Hbr
-0.968
Allene, C
3
H
4
-0.744
Hydrogen Chloride, HC1
-0.650
Ammonia, NH
3
-0.479
Hydrogen Fluoride, HF
-0.253
Argon, A
-0.569 Hydrogen Iodide, HI
-1.403
Bromine, Br2
-0.83
Hydrogen Sulhide, H
2
S -0.751
1,2-Butadiene, C
4
H
6
-1.047
Krypton,
Kr
-0.853
1,3-Butadiene, C
4
H
6
-0.944
Methane, CH
4
-0.512
n-Butane, C
4
H
10
-1.481
Neon,
Ne
-0.205
iso-Butane, C
4
H
10
-1.485
Nitric
Oxide,
NO
+44.2
Butene-1, C
4
H
8
-1.205
Nitrogen,
N
2
-0.358
cis Butene-2, C
4
H
8
-1.201
Nitrogen Dioxide, NO
2
+28.7
iso-Butene, C
4
H
8
-1.274
Nitrous Oxide, N
2
O -0.560
trans Butene-2, C
4
H
8
-1.274
n-Octane, C
8
H
18
-2.840
Carbon Dioxide, CO
2
-0.623
Oxygen, O
2
+100.0
Carbon Monoxide, CO
-0.354 n-Pentane,
C
5
H
12
-1.810
Ethane, C
2
H
6
-0.789
iso-Pentane,
C
5
H
12
-1.853
Ethylene, C
2
H
4
-0.553
neo-Pentane, C
5
H
12
-1.853
Helium, He
-0.059
Propane, C
3
H
8
-1.135
n-Heptane, C
7
H
16
-2.508
Propylene,
C
3
H
6
-0.903
n-Hexane, C
6
H
14
-2.175
Water,
H
2
O -0.381
cyclo-Hexane, C
6
H
12
-1.915
Xenon, Xe
-0.340
Hydrogen, H
2
-0.117
Table 3-4. Oxygen Equivalents of Common Gases