Emerson NGA2000 PMD Benutzerhandbuch

760007-A 
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.) 

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. 

 

 

 

 

 

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