Hach-Lange CL17 USER MANUAL - Manual (Page 42)

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Maintenance
6.1.3 Replace the analyzer tubing
Remaining tubing in the analyzer should be replaced annually.
The maintenance kit is available with the tubing harnesses assembled (6868800) or
unassembled (6868900) If you have ordered the unassembled maintenance kit, use
Figure 21 and Table 7 on page 41 to determine the tubing lengths and positions.
When installing new tubing it is helpful to dip the ends in hot water before making the
connections. It also is recommended that one tube at time be removed and replaced.
Numbers on the illustration correspond to the item numbers listed in the legend where the
size, catalog number, and quantity also are given. The length given in
Table 7 tells how
long that particular tubing segment at a time should be; the operator must cut a piece to
that length from a coil of the proper tubing.
The catalog number given for the tubing in the legend identifies the coil of tubing to cut
the segment from and not the number of the segment itself.
DPD Reagent tubing may darken before the scheduled replacement time but that will not
affect the performance of the instrument.
Table 8 gives information about the air purge, case drain, sample drain, and sample-in
specifications and locations. Refer to Figure 21 .
Figure 21 Plumbing diagram