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6712SR Refrigerated Sampler
Section 2 Installation/Preparation
2-10
2.6 Installing the Sampler The following segment briefly describes initial sampler instal-
lation.
CAUTION
Tests indicate that the pump produces sound levels in excess
of 85db at one meter. Prolonged exposure to this sound could
result in hearing loss and requires the use of protective ear
plugs.
CAUTION
When using the 6712SR sampler with a 750 or 710 module,
transmitters such as cell phones or walkie talkies must not be
operated within 3 meters of the sampler. If water level readings
are fluctuating due to TV/radio station transmitter towers in the
area, the sampler must be relocated.
WARNING
The 6712SR samplers have not been approved for use in
hazardous locations as defined by the National Electrical
Code.
WARNING
If you must enter a manhole or other dangerous location to
install the sampler, observe standard safety precautions.
Refer to Appendix C for a discussion of safety
considerations.
2.6.1 Tips for Routing
Suction Line
Route the line so that it runs continuously downhill from the
sampler to the liquid source. This helps drain the line during
pre-sample and post-sample purges. When the sampler is used in
below freezing temperatures, there is a risk of the suction line
being frozen. A suitably warm sampling source can usually
prevent this, provided there are no loops in the suction line.
Some situations may require more protective measures, such as
insulation of the suction line, or heat tape. Thoroughly draining
the suction line minimizes the possibility of frozen liquid
clogging the line.
2.6.2 Intake Placement For representative samples, place the intake in the main current
of the flow stream, not in an eddy or at the edge of flow. Placing
an intake at the bottom may produce samples with excess heavy
solids and no floating materials, while placement at the top may
produce the opposite conditions.
2.6.3 Positioning a Sampler Place the refrigerator on a relatively flat, horizontal surface.
Placing the refrigerator on a steep incline may cause the sample
to miss the bottle mouth.