6700 Portable Sampler User Manual - Isco

WARNING
If you must enter a manhole
or other dangerous location to
install the sampler, observe
standard safety precautions.
Refer to General Safety
Procedures for a discussion
of safety considerations.
6700 SAMPLERS
Other variations include extended-program settings for suctionline
rinses and sampling retries. A sampler running a program
with line rinses completes the presample purge and 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.
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 6700 delivers the
sample by counting the pump revolutions and automatically
compensating for the suction head.
INSTALLING THE SAMPLER
ICING THE SAMPLES
Placetheiceintothecenterofthebottlekitoraroundthecomposite
bottle. The ice capacity varies according to the bottle kit.
To increase cooling for the sequential bottle kits use an ice-water
bath. Place as much ice as possible in the center of the bottle kit
and slowly add cold water. Continually add ice, as the water will
melt some ice.
Always use the retaining rings or hold downs. They hold the bottles
in position and keep the bottles from floating.
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 presample
and postsample purges. When sampling in near freezing
temperatures, thorough drainage reduces the chances of ice
blocking the line. Avoid loops of coiled suction line.
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.
POSITIONING A SAMPLER
Place the sampler on a relatively flat, horizontal surface. Placing
thesampleronasteepinclinemaycausethesampletomissthe
bottle mouth.
When installing the sampler, be sure the vertical distance between
theleveloftheliquidandthepumpisassmallaspossible.
Using the Suspension Harness or Equipment Platform
Isco offers a stainless steel suspension harness to lower or raise
the sampler through a manhole or suspend the sampler during
operation. You can suspend the harness from any suitable support.
The equipment platform lets you suspend the sampler
inside a manhole.
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