Ozone Gas Generation And Air Flow - Teledyne T200 User Manual

The necessary 2:1 ratios across the critical flow orifices is largely exceeded by the pumps
supplied with the analyzer which are designed to accommodate a wide range of possible
variability in atmospheric pressure and age related degradation of the pump itself. Once
the pump does degrade the ratio between sample and vacuum pressures may fall to less
than 2:1. At this point, the instrument will display an invalid sample flow rate
measurement.
Note
O
ZONE
The excess ozone needed for reaction with NO in the reaction cell is generated inside the
analyzer because of the instability and toxicity of ozone. Besides the ozone generator itself,
this requires a dry air supply and filtering of the gas before it is introduced into the reaction
cell.
Due to its toxicity and aggressive chemical behavior, O
gas stream before it can be vented through the exhaust outlet.
083730200A DCN7962
The diameter of a critical flow orifice may change with
temperature because of expansion of the orifice material and,
hence, the most crucial critical flow orifices (those controlling the
sample gas and O
reaction cell where they can be maintained at a constant
temperature.
G G
AS ENERATION AND
CAUTION – GENERAL SAFETY HAZARD
Ozone (O ) is a toxic gas.
3
Obtain a Material Safety Data Sheet (MSDS) for this gas. Read
and rigorously follow the safety guidelines described there.
Always ensure that the plumbing of the O
supply system is maintained and leak-free.
Teledyne API T200 NO/NO
flow into the cell itself) are located in the
3
A F
IR LOW
must also be removed from the
3
/NO Analyzer with NumaView™ Software
2 x
generation and
3
189