Metrohm NIRS XDS Process Analyzer – MicroBundle - Manual (Page 112)

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5. Probes are generally mounted in
pressure vessels (and other locations)
using Swagelok™ fittings such as that
shown. Nominal inside diameter is
1.00”.
Always follow Swagelok
recommendations for proper pressure
sealing. Any deviation from instructions
may result in leaking.
6. A “probe purge port” is provided on
each lens barrel. This may be used to
introduce a vacuum on the inside of the
lens barrel of the probe. On high
temperature vacuum vessels, this
technique minimizes pressure stress on
the probe window.
If used, remove the 1/16”set screw
using a 3/32” Allen wrench. Use a
suitable 1/16” NPT fitting to connect.
Use of non-threaded lens barrel (existing systems)
Users with permanently installed, non-
threaded lens barrels may upgrade to
the new XDS Process Analytics
instrument. The older lens barrels are
not threaded.
The snap ring must be loosened enough
to slide the knurled collar back, for
access to the set screws.
Window gapping may be an issue with
retrofits. Consult factory for proper
procedure.
After tightening the set screws, move
the snap ring into the groove to retain
the knurled knob. This protects the set
screws from dirt and tampering.