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4Ć90
800 Series Operator's Manual
5. Inspect the sample chamber and bubbletrap for obstructions:
If the obstruction
is . . . Then . . .
near the sample chamber
outlet
a. Disconnect the CO-ox sample tubing from the
sample connector.
b. Manually turn the CO-ox pump clockwise.
c. Move the obstruction just into the sample tubing
that connects the sample chamber to the CO-ox
pump.
NOTE: If air does not remove the obstruction from
the sample chamber, place the sample tubing from the
sample connector into a beaker of reagent water. Turn
the CO-ox pump clockwise to remove the
obstruction.
d. Disconnect the sample tubing from the sample
chamber outlet.
e. Disconnect the CO-ox waste tubing from the inlet
on the reagent manifold.
f. Manually turn the CO-ox pump counterclockwise
to remove the obstruction from the sample tubing.
NOTE: If air does not remove the obstruction from
the sample tubing, place the CO-ox waste tubing in
water. Turn the CO-ox pump counterclockwise to
remove the obstruction.
g. Reconnect all tubing.
near the sample chamber
inlet
a. Disconnect the waste tubing from the inlet on the
reagent manifold.
b. Disconnect the sample tubing from the bubble trap
and the sample chamber inlet.
c. Manually turn the CO-ox pump counterclockwise
to remove the obstruction.
NOTE: If air does not remove the obstruction from
the sample tubing, place the waste tubing into a
beaker of reagent water. Turn the CO-ox pump
counterclockwise to remove the obstruction.
d. Reconnect all tubing.
(Continued)