TELEDYNE API 480M, Руководство пользователя

Страница: 26 / 60

24 Teledyne API Model 480M O
3
Monitor User Manual 09420A DCN8343
3.5. PNEUMATIC CONNECTIONS
Note
Sample tubing made from an inert material such as Teflon
should be used to minimize sample degradation.
Figure 3-6. Pneumatic Connections
3.5.1. SAMPLE INLET CONNECTION
Sample gas connections are made to the ¼” stainless steel compression fitting on
the outside bottom panel.
1/4" O.D. FEP (Teflon

) or Stainless Steel tubing is recommended to connect the
sample source to the monitor (recommended length ≤ 50 feet). Any fittings used in
the sample lines should be constructed of stainless steel or Teflon™.
The monitor has an internal sample pump and is designed to sample gas that is close
to ambient pressure. Ensure that the sample gas pressure is in the range of 11 – 16
psia (pounds per square inch absolute).
Note
For best analytical performance, the tubing should be pre-
conditioned to ozone prior to installation to minimize ozone loss
in the sampling lines.
3.5.1.1 S
AMPLE
F
ILTRATION
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 at the inlet of the Sample
line.