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4.2.5 Main Tube Set

The main tube set is supplied as a pre-cut tubing harness with the fluidic inter-

connections preassembled. Replacement of the tube set should be performed

annually. For removal of the tubing, first remove the ISE SnapPak

from the

reagent compartment. This will allow access for removal of the white TPR

block which is the main interconnection between the ISE SnapPak

and the

tubing. This block can be removed by grasping the front surface and pulling

forward. Next, remove tubing from each solenoid valve. Follow the procedure

outlined in Section 4.1.5 for disassembly of the solenoid valves to enable fluidic

tubing to be easily removed at each solenoid. Pull the two pump windings at the

peristaltic pump tube set off the pump roller and remove the white reference

solution tube connector. Remove the white TPR reference solution block by

grasping the front of the block and pulling forward. The three tube connections

are labeled with green, blue and red tags. All remaining tubes can now be

removed and the entire tubing harness can be discarded.

Fit the replacement tubing harness and assemble in reverse order as disassem-

bly. Reference the Tube Diagram on the next page for correct tube locations.

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