Hach SIGMA 900 User Manual download pdf (Page 15)

Section 3

Page 15

8544install.fm Setting Up the Intake Line and Strainer

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.

3.5 Setting 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

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.

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

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Hach SIGMA 900 User Manual Page 15