Thermo 42i, Instruction Manual

Page: 132 / 314

Calibration
Calibration
4-4 Model 42
i
Low Source Instruction Manual Thermo Electron Corporation
4. Connect the analyzer sample bulkhead input to the output of the GPT
system.
Figure 4-1. GPT System
Dynamic Parameter
Specifications for Gas
Phase Titrator
Use the following definitions for the remainder of this chapter.
P
R
= Dynamic parameter specification to ensure complete reaction of the
available O
3
, ppm-min
[NO]
RC
= NO concentration in the reaction chamber, ppm
t
R
= Residence time of the reactant gases in the reaction chamber, min
[NO]
STD
= Concentration of the undiluted NO standard, ppm
F
NO
= NO flow rate, sccm
F
O
= O
3
generator air flow rate, sccm
V
RC
= Volume of the reaction chamber, cc
F
T
= Analyzer demand plus 10 to 50% excess