Hach APA 6000 Mode D'emploi page 19

Figure 16 Drain lines
1 Bottle enclosure drains (9.53 mm
(0.375-in.) ID hose)
2 Chemical drain (12.7 mm (0.5-in.)
ID hose)
3 Fume trap
4 Air break
5 Case drain (25.4 mm (1-in.) ID
hose)
Figure 17 Sample lines
1 To drain or process stream
2 Vent
3 Drain tee
Sample line guidelines
Select a good, representative sampling point for the best instrument
performance. The sample must be representative of the entire system.
To prevent erratic readings:
• Collect samples from locations that are sufficiently distant from points
of chemical additions to the process stream.
• Make sure that the samples are sufficiently mixed.
• Make sure that all chemical reactions are complete.
4 Sample bypass drain (0.25-in. OD x
0.040-in. ID poly tubing)
5 Sample in (0.25-in. OD x 0.040-in.
ID poly tubing)
6 Shut-off valve
English 19