Teledyne 200A, Instruction Manual, Page: 113 / 220

Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. F1
4. Calculate the resulting NO
2
concentrations as follows:
F
]
NO
[ *
F
+ ] [NO - ] [NO = ]
NO
[
Where
[NO]
T
IMP
2 NO
REM ORIG OUT
2
Equation 7-10
:
ncentration before the GPT ozone is turned on, and [NO]
REM
is the NO
rem
5.
ause is
that the converter needs replacing. See Section 7.8.6 on Moly converter efficiency.
7.8
e
determined from the data collected in 7.8.5.3.
1. Calculate the concentration of NO
2
converted as:
REM
x
ORIG
x
OUT
2
NV
Equation 7-11
:
ntration before the GPT ozone is turned on, and [NO
x
]
REM
is the
NO
2.
ould be a straight line within the
± 2
3.
iciency. The value should be between .96
and
4.
key in the slope from step 3 followed by ENTR. Press EXIT to return to the SAMPLE menu.
ORIG
is the NO co
aining after GPT.
Plot the NO
2
concentration output by the instrument on the y-axis against the generated
NO
2
[NO
2
]
OUT
on the x-axis. The plot should be a straight line within the ± 2% linearity
criteria given for the NO
x
and NO channels. If the plot is not linear the most likely c
.6 Moly Converter Efficiency
The moly efficiency should be 96 to 102% efficient. If it is outside these limits it should b
replaced. The converter efficiency can be
For each NO
2
concentration generated:
[
CO
2
Where
[NO
) ]
NO
[ -
]
NO
([ -
]
NO
[ =
]
NO
x
]
ORIG
is the NO
x
conce
x
remaining after GPT.
Plot the [NO
2
]
CONV
concentration output by the instrument on the y-axis against the
concentration generated [NO
2
]
OUT
on the x-axis. The plot sh
% linearity criteria given for the NO
x
and NO channels.
Determine the best straight line fit of the plot either by inspection or least squares. The
slope of the resulting straight line is the moly eff
1.02. If not, the moly needs to be replaced.
If you want the M200A to automatically compensate (Section 7.8.6.1) for converter
efficiency, enter the efficiency value in the front panel by CAL-CONC-MOLY-SET, then
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