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MODEL TCL SECTION 12
MAINTENANCE
FIGURE 12-4. Replacing Reagent Tubing
12.3 SAMPLE CONDITIONING SYSTEM
12.3.1 Reagent
The sample conditioning reagent lasts about 2 months. Before putting fresh reagent in the carboy, discard any
small amount of remaining reagent. To prepare the reagent refer to the procedure in Section 5.1. See Table 12-4
for ordering information.
12.3.2 Sample and reagent tubing.
Periodically inspect sample and reagent tubing for cracks and leaks. Replace tubing if it is damaged.
After a period of time, the sample tubing may become plugged with suspended matter. The tubing is flexible and
difficult to clean mechanically. Plugged sample tubing is best replaced.
Replacement tubing kits are available. See Table 12-4 for part numbers.
To replace reagent tubing:
1. Reagent tubing is shown in Figure 12-4.
2. Turn off sample and reagent pumps.
3. Luer fittings connect the reagent 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 suction tubing from the barb on the reagent inlet fitting in the bottom of the
enclosure. Disconnect the other end of discharge tubing from the reagent injection tee.
5. Install the replacement tubing. Note that the discharge tubing is longer than the suction tubing.