Teledyne API Model 465L O3 Monitor Operation Manual
05509G DCN6806
Teledyne API Model 465L O
3
Monitor Manual
23
1/4" O.D. FEP (Teflon
) tubing is recommended to connect the sample source to
the monitor. Any fittings used in the sample lines should be constructed of stainless
steel or Teflon
.
Teledyne API recommends that the length of tubing connecting the sample points to
the monitor should be kept to 50 feet or less.
NOTE
For the sampling lines, use only ¼” O.D. FEP tubing. For best analytical performance, the
tubing should be pre-conditioned to ozone prior to installation to minimize ozone loss in the
sampling lines. Pre-conditioned tubing is available from Teledyne API (Part number 02639)
4.3.1.1.
Sample Filtration
The most important factor in maintaining an accurate and stable monitoring system
for ozone is the cleanliness of entire pneumatic system leading up to (and including)
the sensor assembly inside the instrument. Provision must be made for keeping dust
and other particulate matter out of the monitor and upstream sample delivery tubing.
The monitor is equipped with an internal particulate filter down-stream of the
selector manifold.
In addition, it is recommended that inlet filters be installed at the inlet of each
sample line. These filters should be constructed of PTFE or other inert material to
avoid degradation of the ozone concentration. Appropriate disposable inlet filters
can be purchased from TAPI. See the Spare Parts list at the end of this manual for
ordering information.
4.3.1.2.
Sample System Design in Humid Environments
Care must be taken in the design of the sampling system to ensure that water vapor
does not condense in the sampling lines or in the instrument itself. The sample lines
should be routed to avoid large temperature gradients along the lines. If sample is
brought in from a hot, humid area into a much cooler area, then low power heating
tape should be wrapped around the lines to keep the temperature of the sample lines
up and avoid condensation. The lines should also not have loops or low points
where water could collect.
For applications that require sampling of very humid gas, a Sample Conditioner
and/or a Permeation Gas Dryer may be required to lower sample gas humidity. A
pneumatic block diagram with the locations of these 465L options is shown in
Figure 4-5, followed by a description of each. Please contact the Teledyne API Sales
Department for additional information.
Summary of Contents for 465L
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