Replace A Tube - HACH LANGE APA 6000 Mantenimiento Y Solución De Problemas

Figure 6 Remove the filter holder and filter
1 Quad ring
2 Filter
14 English
3 O-ring
4 Knurled nut

Replace a tube

N O T I C E
Do not change the tube lengths of the holding coil tubes or the tube between the
rotary valve and mixer chamber because this will affect analyzer performance.
Replace a tube when it has damage and/or contamination buildup that
prevents flow through the tube. Replacement tubing and a tubing cutter
are supplied with the analyzer.
Items to collect:
• Tubing, Tefzel, 0.030-in. ID x 0.062-in. OD
• Tubing cutter
1. Put the analyzer in shutdown mode. Refer to
shutdown mode on page 5.
2. For an external tubing (i.e., to analyzer bottles, sample inlet or
sample bypass drain), remove the tubing cover from the back,
underside of the analyzer enclosure.
3. Remove the fittings on the ends of the tube from their ports. Identify
the fittings on the tube (¼-28 flat bottom fitting or 10-32 rotary valve
fitting). Refer to Figure 7 and
4. Remove the fittings from the ends of the tube.
5. Remove the label from the tube if present.
6. Use the tubing cutter to cut a section of tubing that is the same
length as the tube to be replaced.
7. Put the removed label (if present) on the new tube.
8. For an external tube, put the tube through the rubber grommet, then
put it into the correct position in the manifold on the interior bottom of
the analyzer enclosure.
9. Put the tubing in the correct location on the exterior and interior of
the instrument.
10. Install new fittings on the ends of the new tube.
11. Tighten the fittings on the ends of the tube into the ports. Fittings
should be securely finger tightened. Do not over-tighten the rotary
valve fittings because that will pinch the tubing at the ferrule and slow
or stop liquid flow through the tube.
Put the analyzer in
Figure 8.