Campbell Scientific PVS4100/4120/4150 Portable Automatic Samplers - Manual (Page 15)

Section 1. Product Overview
1-7
TABLE 1-3. Vacuum System Features
Number Item Description
1 Solenoid Valves Control the air flow from pump to sampler, either purging or
sucking.
2 Pump Located behind a sheet of metal, the pump does not come into
contact with any liquid whatsoever. It does all the drawing and
purging through using a vacuum and compressor.
3 Touchpad Controller Controls sampler program and offers status feedback on LCD.
4 Sample Distributor Rotates distributor arm between multiple discrete containers.
5 Distributor Arm Dispenses liquid from metering chamber into discrete container.
6 Discrete Sample Containers Multiple containers, always in a quantity divisible into 24
(PVS4100 and PVS4120 only).
7 Pressure Gauge Visually describes sampling process in terms of
vacuum/pressure. Useful for troubleshooting a plugged/kinked
line, or signals leaks. Optional (PVS4150 only).
8 Liquid Sensing Rod This rod must remain above the volume control tube. When the
sample liquid comes into contact with the two rods it signals the
controller to stop sampling and begin purging.
9 Barrier Valve Prevents metering chamber overflow in case the liquid sensing
rod fails (e.g. completely coated with oils/grease).
10 Volume Control Tube Mechanically set the volume required for sample by using a
wrench on the fitting at the base of this stainless steel tube.
11 Metering Chamber Sample is drawn into chamber up to level set by volume control
tube, then line is purged, followed by dropping sample into
containers. Metering Chambers come in glass or acrylic, from
250cc to 500cc.
12 Pinch Valve This valve shuts during sampling, then opens during sampling to
drop sample into container, then closes to purge hose.
13 Cap with “Container Full” Shut-
off Optional cap contains Overflow Protection Probes which signal
the sampler to halt when container is full. Can be installed in
maximum two containers, or into a discrete bottle tray.
14 Composite Sample Container A single container to hold sample liquid.
15 Intake Hose Standard samplers come with 25 Feet of 3/8” ID PVC tube.
16 Sinker. Optional Strainer. Keeps the end of the intake tube in the source liquid. Optional
strainer can raise collection point above sinker.