Hach APA 6000, Installation Manual

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Figure 16 Drain lines
1 Bottle enclosure drains (9.53 mm
(0.375-in.) ID hose) 4 Air break
2 Chemical drain (12.7 mm (0.5-in.)
ID hose) 5 Case drain (25.4 mm (1-in.) ID
hose)
3 Fume trap
Figure 17 Sample lines
1 To drain or process stream 4 Sample bypass drain (0.25-in. OD x
0.040-in. ID poly tubing)
2 Vent 5 Sample in (0.25-in. OD x 0.040-in.
ID poly tubing)
3 Drain tee 6 Shut-off valve
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.
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