Hach 900 manual Setting Up the Intake Line and Strainer, Choosing Bottles, Size Material

Section 3

4.Slide the tubing clamp over the silicone tubing until it is over the stainless steel fitting on the liquid sensor. Tighten to secure.

5.Repeat the procedure for the intake strainer.

3.5Setting Up the Intake Line and Strainer

For each sampling location, the intake line should be as short as practical, and be free of any sharp bends, coils, or loops. Install the intake line with a downward slope from the sampler to the sample source because:

•This will assure the complete drainage of the intake line when it is air- purged before and after each sample, and will help to prevent cross- contamination of the individual samples.

•Complete drainage is important in freezing conditions, as any liquid slugs that remain could freeze and plug the line.

Place the sample intake and strainer in the mainstream of the sampling source, in an area of turbulent and well-mixed flow.

Also, take in account the vertical location of the intake. A position too near the surface may yield excess lighter materials, while a position too near the bottom may yield excess heavy materials. The constituents of interest must be considered when positioning the intake strainer.

3.6 Choosing Bottles

A broad range of bottle configurations are available for the 900 Composite

Sampler. Refer to

Size		Material
9.5 L (3 gal)		Polyethylene
11.4 L	(2.5 gal)	Glass
15.1	(4 gal)	Polyethylene
20.1 L	(5.5 gal)	Polyethylene
22.7 L (6 gal)		Polyethylene

3.7 Installing the Full Bottle Shut-Off

Install the optional full bottle shut-off into the bottle cap using the attached rubber grommet. Install the full bottle shut-off connector to the mating plug which is attached tot he sampler back panel. Insert the sample tubing into the cap of the bottle.

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8544install.fm	Setting Up the Intake Line and Strainer