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Paramagnetic O2 Purity Analyzer
3.5.1 Gas Connections—Analysis Unit
When making gas connections to the fittings on the rear panel of the
Analysis Unit:
1. Insert the 1/4 or 1/8 inch tube into the fitting and finger-tighten
the nut where the tube cannot be rotated freely. Tighten the nut
an additional 1/8 turn beyond finger-tight.
2. When assembling new fittings for the first time: Use a wrench
to hold the fitting body and keep it from turning while you
tighten the nut using another wrench. Tighten the nut 1 ¼ turns.
NOTE:The analyzer requires the use of a flow limiting device installed in
the sample in line to prevent damage to the sensor. The analyzer is
shipped with an appropriate flow restrictor which should be
installed in the sample line upstream of the Analysis Unit.
It is also recommended that a 50 micron filter be installed in the
sample line upstream from the restrictor to remove particulate matter that
could otherwise clog the narrow passageways in the restrictor or sensor.
The sample system is described in Part II Section 6.4.
NOTE: If a bypass loop is used to increase the system response, this loop
must be external to the analyzer.
1. Install flow restrictor or valve
2. Connect the 1/4 inch Sample In line
2. Connect the 1/4 inch Sample Vent line
3. Connect the 1/8 inch Pressure Vent line from the Control Unit
The Analysis Unit is now installed and ready for leak checking. Refer
to Section 6.5 for leak checking procedures.
3.6 Testing the System
Before plugging the instrument into the power source:
1. Install the Analysis Unit. Refer to Section 3.4 for information
on installing the Analysis Unit.
2. Check the integrity and accuracy of the gas connections. Make
sure there are no leaks.
3. Check the integrity and accuracy of the electrical connections.
Make sure there are no exposed conductors.
Teledyne Analytical Instruments
Installation
39
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