Teledyne 200A Instruction Manual page 106

Teledyne API Model 200A NO
If t is >2 minutes or if P
r
(F , F
T O
have to be made, and t
9. After equations 7-5 and 7-6 are satisfied, calculate the diluent air flow (F
Equation
7-7:
= −
F F
D T
7.8.4.3 Example GPT Calculation
Following is an example calculation that can be used to determine whether an existing GPT
calibrator will meet the required conditions for a specific calibration. For this example, it is
assumed that only the volume of the reaction chamber, V
standard, [NO]
uses, these flow settings are known and need only to be substituted in Equations 7-5 and 7-6 to
verify the required conditions. Before doing any calculations, the URL and flow demand of the
analyzer being calibrated must be known. Operating parameters are determined from the
operations manual:
Upper range limit = 0.5 ppm, and
Flow demand = 500 cm
Volume of calibrator reaction chamber is determined by physical measurement:
3
V = 180 cm
RC
The concentration of the NO standard gas to be used is determined by reference against an
NIST-SRM (Section 2.0.7, Q.A. Handbook):
[NO] = 50.5 ppm
STD
1. Determine the minimum total flow (F
1:
F = 500 cm
T
Analyzer Instruction Manual, 02246, Rev. F1
X
is <2.75 ppm-min, changes in flow conditions
R
, F ) or in the reaction chamber volume (V
NO
r
−
F F Equation 7-7
O N O
, are known. All flow settings (F
STD
3
/min.
3
/min (110/100) = 550 cm
NOTE
and P will have to be re-calculated.
R
RC
, F , F
NO O
) required at the output manifold using Equation 7-
T
3
/min
7-18
), or both will
RC
D
, and the concentration of the NO
, and F ) will be calculated. In many
T D
) using