Teledyne Refrigerated Sampler 6712FR - Manual (Page 40)

6712FR Refrigerated Sampler
Section 2 Installation/Preparation
2-10
then rinses the line. The suction line is purged after each rinse.
When programmed for sampling retries, the sampler will
attempt to pump a sample again if it fails on previous attempts.
2.5.1 Measuring Sample
Volume
“Sample volume” refers to the amount of liquid delivered into a
bottle. The volume is determined by the programmed value. The
volume is dependent on the volume per revolution of the pump,
which is dependent on the suction head. The 6712FR delivers the
sample by counting the pump revolutions and automatically
compensating for the suction head.
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 6712FR 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 6712FR 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.