Hach 900 MAX Choosing Bottle and Retainer Configurations, Setting Up the Intake Line and Strainer

Section 2

4.Repeat the procedure for the fitting that connects the Teflon-lined tubing to the silicone pump tubing.

Figure 8 3/8″ ID Teflon-lined Tubing Attached to Intake Strainer and Tubing Connector

1.	Intake strainer	4.	Stainless-steel tubing connector
2.	Tubing clamp (3 required)	5.	Teflon-lined intake tubing
3.	Two-inch piece of silicone tubing	6.	Wide end of stainless steel tubing connector

2.3.2 Setting Up the Intake Line and Strainer

Note: If site conditions do not permit the intake to slope downward from the sampler to the sample source, disable the liquid sensors by calibrating the sample volume using the Timed Calibrate method when programming the sampler.

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 ensure 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 and possibly damage the sampler.

Note: Vertical lift should not exceed 27 ft. If the site requires more lift, you may purchase the Remote Pump Option. The remote pump option is factory installed. Any remote pump installed outside the factory will void the warranty.

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

Also, you must account for 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.

2.4 Choosing Bottle and Retainer Configurations

A broad range of bottle configurations are available for the Sigma 900 MAX

Refrigerated Sampler.

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Choosing Bottle and Retainer Configurations	8990hrd.fm