ISCO 6700SR, Instruction Manual, Page: 64 / 190

6700SR Refrigerated Sampler
46
Installing the Sampler
Tips for Routing Suction Line
Route the line so that it runs continuously downhill from the sam-
pler to the liquid source. This helps drain the line during presample
and postsample purges. When sampling in near freezing tempera-
tures, thorough drainage reduces the chances of frozen liquid
blocking the line. Avoid loops of coiled 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 the 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 refrigerator on a relatively flat, horizontal surface if pos-
sible. The refrigerator does have leveling feet. Adjust the feet to
keep the refrigerator level. If the refrigerator is not level the sam-
ple may miss the bottle mouth.
When installing the sampler be sure the vertical distance between
the level of the liquid source and pump is as small as possible.
Connecting External Instruments
Flow Meter Connector - Connect the sampler to Isco flow
meters, flow loggers, PAL 1101s, or 1640 Liquid Level Actuators by
attaching their connect cable to the Flow Meter Connector. When
using the sampler with an external instrument, remember these
guidelines:
• Both the sampler and the flow instrument must be on and run-
ning a program.
• If using a flow meter or flow logger for flow pacing, the sampler
and the flow instrument must both run programs with flow pac-
ing settings.
• If using a flow meter or flow logger for trigger pacing, the sam-
pler must run a program with flow pacing settings, and the flow
instrument must run a program with trigger pacing settings.
• When the sampler runs an event-paced program, it disregards
pacing pulses from a flow meter or flow logger. However, the
sampler continues to monitor for enable signals. (See Sampler
Enable on page 84.)
Rain Gauge Connector - Connect the rain gauge, YSI Sonde, or
Refrigerator Temperature Sensor connect cables to the nine-pin
Rain Gauge Connector. (Samplers with a four-pin Rain Gauge Con-
nector can only accept a rain gauge.) When connecting a rain gauge
and a YSI Sonde, or rain gauge and a Refrigerator Temperature
Sensor, use the appropriate Y-connect cable. See the
Accessories
appendix at the end of this manual.
Flow Meter
Connector
Rain Gauge
Connector