S
TARTUP AND
C
ALIBRATION
3-6
June 1997 Rosemount Analytical 748213-P
Model 755R Oxygen Analyzer
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 for setting the
SPAN control is the same as the true value (i.e., 100% oxygen).
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 sample, this difference is negative. The negative
value may be set on the digital display or the recorder if provided with below-zero
capability.)
GAS
EQUIV. % AS
O
2
GAS
EQUIV. % AS
O
2
Acetylene, C
2
H
2
-0.612
Hydrogen, H
2
-0.117
Allene, C
3
H
4
-0.744
Hydrogen Bromide, Hbr
-0.968
Ammonia, NH
3
-0.479
Hydrogen Chloride, HC1
-0.651
Argon, A
-0.569
Hydrogen Fluoride, HF
-0.253
Bromine, Br
2
-1.83
Hydrogen Iodide, HI
-1.403
1,2-Butadiene C
4
H
6
-1.047
Hydrogen Sulphide, C
2
S
-0.751
1,3-Butadiene C
4
H
6
-1.944
Kryton, Kr
-0.853
n-Butane, C
4
H
10
-1.481
Methane, CH
4
-0.512
iso-Butane, C
4
H
10
-1.485
Neon, Ne
-0.205
Butene-1, C
4
H
8
-1.205
Nitric Oxide, NO
+44.2
cis Butene-2, C
4
H
8
-1.252
Nitrogen, N
2
-0.358
iso-Butene, C
4
H
8
-1.201
Nitrogen Dioxide, NO
2
+28.7
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, H
e
-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
12
-2.175
Water, H
2
O
-0.381
cyclo-Hexane, C
6
H
12
-1.915
Xenon, Xe
-1.340
T
ABLE
3-2. O
XYGEN
E
QUIVALENT OF
C
OMMON
G
ASES
