Metrohm NIRS XDS Process Analyzer – SingleFiber - Manual (Page 51)

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Slide the knurled collar up onto the connector
housing. The final assembly is shown.
To attach to the instrument, insert the
connector jack (tab down) into the plug on the
side of the instrument.
Push until it “clicks” into place.
Thread the knurled collar onto the threaded
portion of the mating assembly. Tighten hand-
tight.
Be sure the knurled collar is tightened enough
to compress the O-ring, to seal out
contaminants.