Pump Tube Connections - Hach QC8500 Series 2 User Manual

1 Union connector
2 From manifold
3 Flow cell seen from below

4.3.4 Pump tube connections

4. Place the flow cell into the lower slot of the detector
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
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.
Figure 40 Flow cell—bottom view
A pump tube adapter connects the Teflon tubing to Tygon tubing
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
3. Slide the collar on the pump tube. Make sure the threaded end faces the tubing edge.
(Figure 44 on page
4 To waste
5 Pump tube adapter
6 Upper connector
40.
Operation
43). Press
(Figure 47 on page 49).
(Figure 41 on page 40).
39