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MODEL TCL SECTION 12
MAINTENANCE
61
FIGURE 12-5. Replacing Sample Tubing
To replace sample tubing:
1. Sample tubing is shown in Figure 12-5.
2. Turn off the sample and reagent pumps.
3. Luer fittings connect the sample tubing to the pump. Disconnect the tubing by turning the fitting in the direc-
tion of the arrows shown in Figure 12-6.
4. Disconnect the other end of the sample pump suction tubing from the overflow sampler. Pull the reagent injec-
tion tube off the reagent injection tee.
5. Disconnect the other end of the sample pump discharge tubing from the flow cell. Pull the air injection tube off
the air injection tee.
6. Disconnect the sample inlet and drain tubing.
7. Install the replacement sample pump suction and discharge tubing assemblies. The assemblies look similar.
To tell the difference, note the air injection tee in the discharge tubing assembly has a larger diameter barb
than the reagent injection tee in the suction tubing assembly.
8. Install replacement sample inlet and drain tubing. The sample inlet tubing is longer than the drain tubing.