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6712SR Refrigerated Sampler
Section 2 Installation/Preparation
2-9
Figure 2-5 Identifying the Sampler Components
Other variations include extended-program settings for
suction-line rinses and sampling retries. A sampler running a
program with line rinses completes the pre-sample 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.
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 6712SR delivers the
sample by counting the pump revolutions and automatically
compensating for the suction head.
a
i
b
c
d
h
j
e
f
g
a. Controller.
b. Peristaltic pump.
c. Liquid Detector.
d. Strainer
e. Suction line
f. Stainless Steel Coupling
g. A pump tube routed from the
liquid detector’s intake port
through the pump, out the
detector’s discharge port, and
over the side of the controller to
a bulkhead fitting.
h. Bulkhead fitting.
i. Discharge tube running from the
bulkhead fitting through the
spring and distributor arm.
j. Distributor arm and spring.