Hach-Lange Sigma SD900 Portable - Manual (Page 30)

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Installation
5. Place the intake tube and strainer in the main stream of the
sample source where the water is turbulent and well-mixed.
Make sure that the intake tube does not have kinks or loops.
3.5 Electrical installation
Connect cables to the controller as shown in Figure 14 for the
following components:
• Power ( section 3.5.1 )
• Flow meter or other device ( section 3.5.2 on page 31 )
• Communications ( section 3.5.3 on page 31 )
Figure 13 Intake tubing installation
1 Strainer 3 Strain relief
2 Intake tubing 4 Liquid sensor