Metrohm NIRS XDS Process Analyzer – SingleFiber - Manual (Page 42)

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6.2 Assembly of Detector (return) fiber to multiplexer
The “Channel” number for a given fiber bundle
(or pair, if Transmission) may be determined by
checking where the “return” fiber is screwed in
to the multiplexer.
The channel numbers are stamped into the sheet
metal, but are quite difficult to read. This photo
shows the channel positions.
Position #10 is the internal reference fiber, from
position #10 on the lamp box. The fiber at the
center takes the light to the monochromator
box.
Tightening torque is 8 in-lb (0.9Nm). Do not
exceed the recommended torque.
A suitable wrench is the NC-100 with 5/16”
(about 8mm) head, made by Seekonk
Manufacturing Co., Seekonk, MA 02771, USA.
Remove caps from unused channels to facilitate
access, then replace caps. The head on the NC-
100 is large, and may be hard to turn if caps are
not removed before use.