Teledyne 200A, Instruction Manual, Page: 107 / 220

Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. F1
Because low flows are difficult to control and measure, it is often advantageous to set a higher
total flow than needed. In this example, we will let F
T
= 2750 cm3/min
2. Determine the highest NO concentration, [NO]
OUT
, required at the output manifold, using
Equation 7-2:
[NO]
OUT
= 0.5 ppm (90/100) = 0.45 ppm
3. Calculate the NO flow (F
NO
) required to generate the NO concentration [NO]
OUT
, using
Equation 7-3:
min /
cm
24.5
ppm 5 . 50
min /
cm
2750 ppm 45 . 0
=
F
3
3
NO
=
×
4. Calculate the required flow rate through ozone generator (F
O
) using Equation 7-4:
O
3 3
3
F =
50.5 ppm x 24.5 cm / x 180 cm
2.75 ppm -
- 24.5 cm /
min
min
min
= 80984
cm /
- 24.5 cm / = 260 cm /
6 2 3 3
min
min min
5. Verify that the residence time (t
R
) in the reaction chamber is <2 min using Equation 7-5:
min 63 . 0
min /
cm
260
cm
180
= t
3
3
R
=
min /
cm
5 . 24
3
+
6. Verify the dynamic parameter specification (P
R
) of the calibrator reaction chamber using
Equation 7-6:
min ppm 75 . 2
min /
cm
5 . 24 min /
cm
260 min /
cm
5 . 24 min /
cm
260
ppm 5 . 50 =
3 3 3 3
− =
+
×
+
×
cm
180 min /
cm
24
P
3 3
R
7. Calculate the diluent air flow (F
D
) required at the mixing chamber, using Equation 7-7:
F
D
= 2750 cm
3
/min - 260 cm
3
/min - 24.5 cm
3
/min = 2465.5 cm
3
/min
7-19