Attaching The Suction Line; Vinyl Suction Line - Teledyne 5800 Installation And Operation Manual

Isco 5800 Refrigerated Sampler
Section 2 Installation
2.6 Attaching the Suction
Line

2.6.1 Vinyl Suction Line

2-14
The suction line is the tubing from the sampling point to the
pump tube inlet. The sampler uses a
lengths from 3 to 99 feet. Teledyne Isco offers vinyl or FEP-lined
suction lines. The FEP-lined tubing has a polyethylene jacket to
protect it from kinks and abrasions.
The vinyl suction line contains a very low parts-per-million level
of phenols. If phenol content affects your sample analysis, use the
FEP-lined suction line.
The 5800 sampling system is designed for operation with
minimal inlet obstruction. In order to prevent pump leakage, or
pump tubing breakage or separation from the coupler, ensure
that the strainer remains unobstructed at all times and that the
suction line cannot be kinked or collapse.
Teledyne Isco ships suction line in standard lengths of 3.0 m
(10 ft) or 7.6 m (25 ft). Either length should be cut to the shortest
length feasible for the installation. When installed, the line
should run the shortest possible distance from the collection
point to the pump, preferably with a gradual upward slope.
Excess suction line should be cut, not coiled. Coiled suction line
w i l l h o l d l i q u i d b e t w e e n s a m p l e e v e n t s w h i c h c o u l d
cross-contaminate samples or freeze in cold climates. If the
standard lengths are too short, or if you are cutting compatible
3
/ -inch ID suction line from a bulk spool, you can use lengths
8
30 m (99 ft) or less.
When accurate, repeatable sample volumes are important, use
care to cut the suction line to the correct increments:
• When the sampler is using metric units of measure, cut
the line in 0.1 m increments. For instance, cut 4.2 m, not
4.26 m.
• When using English units of measure, cut the line in
increments of 1 foot.
Record this cut length. Later, you will enter this value in the
SUCTION LINE configuration option (Section 3.3.4).
Attach the vinyl suction line to the pump tube with the tubing
coupler. First, screw the threaded end into the suction line until
the flat surface is flush against the suction line (Figure 2-8).
Failure to do this will allow air to leak into the sample and
adversely effect the sample volume accuracy. Then, push the
other end of the coupler into the end of the pump tube until the
other flat surface is flush against the tubing.
3
/ -inch ID suction line of
8
CAUTION