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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
4.2.8 Ozone Generator
Because of the instability of ozone, it is necessary to generate this gas inside the analyzer. The
ozone generation module consists of a high voltage AC supply and silent discharge tube and
permeation type air drier. A complete description of its function and service requirements can be
found in Section 9.3.6.
CAUTION
Lethal voltages present inside ozone generator.
Do not defeat electrical interlock.
The dry air supply for the ozone generator uses a membrane drier to supply air with a dew point
of 0
o
C or less. The exhaust side of the membrane is connected to the vacuum manifold at the
rear of the instrument.
Normal room air contains enough water vapor to damage the generator and components
downstream. To prevent damage, the generator will be turned ON after 30 min following a cold
start. Otherwise, the starting of the generator will follow the table below:
Table 4-4-4: Ozone Generator Start-up Timing
Ozone Gen State at
Power-On
Instrument Action
ON If instrument has been off for less than 30 min
OFF If instrument has been off for more than 30 min
4.2.9 Molydbenum Converter
The molybdenum converter is a stainless steel cartridge containing molybdenum chips heated to
315 C. The converter's function is to reduce nitrogen dioxide NO
2
to nitric oxide NO. The
temperature control for this module is done by the computer.
4-9
PRINTED DOCUMENTS ARE UNCONTROLLED