Calibration
Calibration
Thermo Electron Corporation
Model 42
i
Low Source Instruction Manual
4-5
The O
3
generator (ozonator) airflow rate and the NO flow rate must be
adjusted such that the following relationships hold:
Determining GPT System Flow
Conditions
Use the following procedure to determine the flow conditions to be used in
the GPT system.
1. Determine F
T
, the total flow required at the output manifold, which
should be equal to the analyzer demand plus 10 to 50 percent excess.
2. Establish [NO]
OUT
as the highest NO concentration that will be
required at the output manifold. [NO]
OUT
should be about equal to
90% of the upper range limit (URL) of the NO
2
concentration range to
be covered.
3. Determine F
NO
as:
4. Select a convenient or available reaction chamber volume. Initially a
trial volume may be selected in the range of 200 to 500 cc.
5. Compute F
O
as:
min
-
ppm
2.75
t
x
]
[NO
=
P
R
RC
R
t
)
F
+
F
(
F
]
[NO
=
]
[NO
NO
O
NO
STD
RC
min
2
<
F
+
F
V
=
t
NO
O
RC
R
]
[NO
F
x
]
[NO
=
F
STD
T
OUT
NO
F
-
2.75
V
x
F
x
]
[NO
=
F
NO
RC
NO
STD
O
Summary of Contents for 42i
Page 4: ...WEEE Compliance WEEE Compliance Thermo Electron Corporation ...
Page 14: ...Tables xiv Model 42i Low Source Instruction Manual Thermo Electron Corporation ...
Page 28: ...Installation Startup 2 6 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...
Page 128: ...Operation Password 3 100 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...
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