Teledyne Refrigerated Sampler 6712FR - Manual (Page 41)

6712FR Refrigerated Sampler
Section 2 Installation/Preparation
2-11
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.
When installing the sampler, be sure the vertical distance
between the level of the liquid and the pump is as small as pos-
sible.
CAUTION
The refrigerator’s lower compartment is not watertight. Do not
install in a location where the refrigerator’s lower compartment
could become submerged.
2.7 Connecting External
Instruments
The 6712FR sampler can be used in conjunction with several
types of external instruments.
2.7.1 Flow Meter To connect the sampler to an Isco open-channel flow meter, 4100
series flow logger, 2100 series flow module, or 1640 Liquid Level
Actuator, attach the sampler-to-flow meter cable to the Flow
Meter Connector. To connect the sampler to a closed-pipe flow
meter, attach an Isco 4-20 mA Input Interface device to the
sampler’s Flow Meter connector. Plug the line cord into an AC
power outlet. Be sure it is connected to 120 volts AC (optional
230 volts AC). When using the sampler with an external
instrument, remember these guidelines:
• Both the sampler and the flow instrument must be on
and running a program.
• If using a flow meter, logger, or module for flow pacing,
the sampler and the flow instrument must both run
programs with flow pacing settings.
• If using a flow meter or flow logger for trigger pacing,
the sampler 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.
2.7.2 Rain Gauge Connector Connect the rain gauge, SDI-12 Sonde, or Refrigerator Temper-
ature Sensor connect cables to the nine-pin Rain Gauge Con-
nector. When connecting a rain gauge and an SDI-12 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
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