39
Operation
4. Place the flow cell into the lower slot of the detector (Figure 44 on page 43). Press
firmly until it snaps into place.
Note: The flow cell is keyed so it can only be inserted one way.
5. Connect the top tubing of the flow cell to a waste line. Connect the bottom tubing to
the fitting on the manifold next to the To Flow Cell
label (Figure 47 on page 49).
6. Refer to the QuikChem Method manifold diagram for details.
Note: If flow cell connections are reversed, air bubbles may become trapped in the flow cell. This
can cause baseline shifts and peak problems.
4.3.4 Pump tube connections
A pump tube adapter connects the Teflon tubing to Tygon tubing (Figure 41 on page 40).
This is typically used for the connection of pump tubes to the manifold tubing. It is also
used to connect the flow cell outlet to a waste line.
To connect the pump tube:
1. Obtain a pump tube adapter. If this connection will be used for the sample line,
remove the metal nipple from the pump tube adapter with a pair of pliers.
2. Unscrew the black or white collar. Make sure the correct collar for the pump tube is in
use. Refer to Table 7 on page 40.
3. Slide the collar on the pump tube. Make sure the threaded end faces the tubing edge.
Figure 40 Flow cell—bottom view
1 Union connector 4 To waste
2 From manifold 5 Pump tube adapter
3 Flow cell seen from below 6 Upper connector
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