2 setting up the intake line and strainer, 4 choosing bottle and retainer configurations – Hach 900 MAX User Manual
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Choosing Bottle and Retainer Configurations
8990hrd.fm
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
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.
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