Hach Polymetron 9610sc SiO2 Installation Manual page 8

Figure 3 Ports for one or two sample streams
1 Drain vent-keep open 4 Air purge inlet
(optional)
2 Not used
5 Sample 1 bypass
drain
3 Two sample stream 6 Chemical drain
analyzers only:
Sample 2 bypass
drain
8 English
Figure 4 Ports for four sample streams
1 Not used
2 Sample 4 bypass
7 Case drain for spills
3 Sample 3 bypass
or leaks
8 Sample 1 inlet
4 Air purge inlet
9 Two sample stream
analyzers only:
Sample 2 inlet
5 Sample 2 bypass
drain
6 Sample 1 bypass
drain drain
7 Chemical drain
drain
8 Case drain for spills
(optional)
or leaks
9 Sample 1 inlet
10 Sample 2 inlet
11 Sample 3 inlet
12 Sample 4 inlet