Hach-Lange DR 3800 User Manual - Manual (Page 139)

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Pour-Thru Cell
A.2 Installation of the Pour-Thru module
1. Open the cell compartment.
2. Insert the Pour-Thru Cell Adapter B in cell compartment #2 so
that the light path arrow on the adapter points left ( Figure 5 on
page 16 ).
Note: Do not use Adapter C. It places the cell too low and does not
prevent rotation of the Pour-Thru Cell.
3. Connect the 1 / 8 in. Cell Inflow and Outflow Tubes to the
Pour-Thru Cell ( Figure 12 ).
4. Wipe the Pour-Thru Cell with a lint-free cloth and insert it fully in
the cell holder to lock in position so that the cell is oriented for
the necessary pathlength and cannot rotate in the adapter. For
the 22-mm orientation, the inlet and outlet fittings are parallel to
the light path. For the 1-cm orientation, the inlet and outlet
fittings are perpendicular to the light path (
Figure 13 ).
Note: The light of the optical system of the instrument passes right to
left as viewed from the front of the instrument.
5. Connect the Inflow Tube to the fitting at the bottom of the glass
funnel and clamp the glass funnel to the stand. Minimize the
tubing length to eliminate air bubbles and improve flow.
6. Connect the Outflow Tube to the top fitting of the stand pipe.
Minimize the tubing length to eliminate air bubbles and improve
flow.
Note: Make sure there are no kinks in tubes that will impair flow and
retain bubbles.
7. Connect the Drain Tube (rubber tube) to the bottom fitting of the
stand pipe and clamp the stand pipe to the stand.
8. Connect the free end of the Drain Tube to an appropriate waste
vessel.
Note: The drain tube must flow freely to the waste vessel. Keep the
drain pipe horizontal and below the outlet of the stand pipe. Shorten
tubes to minimize flow restrictions.
9. To ensure proper drainage for the funnel, adjust the relative
heights of the stand pipe and funnel as shown in Figure 12 ,
item 3. The funnel height determines the speed of sample flow
through the cell. The higher the funnel, the faster the flow. To
minimize air bubbles, adjust the funnel so that it drains
completely with the final level of liquid in the tube about 5 cm
(2 inches) below the tip of the funnel.
10. Pour 25 to 50 mL of deionized water into the funnel and allow
the funnel to drain. If necessary, move the stand pipe up or
down until the funnel drains smoothly and stops draining at the
correct level