11
Disconnect the ribbon cable connectors attached to
the source and/or detector housing circuit board.
12
Remove the Bev-A-Line® tubing connected to the
source and/ or detector housing at the quick-connect
fitting.
Press down on the orange part of the fitting to remove
the tubing.
13
The source and/or detector housing, with the
attached circuit board and tubing can now be
removed and discarded.
Note that there are O-rings on each end of the optical
bench. It is a good practice to replace the O-ring when
replacing the source. Make sure the optical path tube is
clean (no dust, dirt, etc.) before proceeding. Clean it if
needed, as described in the instruction manual.
14
Re-assemble the bench using the replacement source
and/or detector.
Be sure the O-rings are in place on both ends of the
bench. Note that the orientation of the optical bench cyl-
inder is not important; either end can be inserted into the
source or detector housing.
15
Replace the tubing.
Any tubing that you removed should be replaced with a
piece of equal length, which can be cut from the tubing
that is included in the instrument spares kit.
16
Re-assemble the LI-8100/A case.
Make sure that the foam insulation on the inside top
cover is positioned over the optical bench; it is required
for thermal stability. The remaining assembly procedures
are the opposite of the disassembly.
17
Perform zero and span calibrations as described in
the LI-8100/A Instruction Manual.
A simple zero and span will be adequate if the span gas is
close to the concentrations you will measure. A dual span,
however, will bring the instrument performance within
specifications across the full measurement range. If you
do not have zero and span gases, send the instrument
back to LI-COR for a factory recalibration.
5
