Campbell PVS5120 Series, Instruction Manual

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1
PVS5120-Series Portable Samplers
1. Introduction
The PVS5120-series samplers are automatic liquid samplers for water and
wastewater applications. These samplers gather fluid automatically from a
variety of sources including containers, open channels, sewers, pipes, and any
open source of water. They are lightweight, portable, battery-powered water
samplers designed for reliable unattended sample collection.
The PVS5120-series portable samplers use the VSC100 controller that allows a
Modbus® RTU master, SDI-12 master device, simple pulse input, or Campbell
Scientific PakBus® datalogger to control and communicate with the water
sampler. The PVS5120 can also run in a time-controlled, stand-alone mode.
The PVS5120C is a composite sampler that deposits its water samples into one
9 L container; the PVS5120D is a discrete sampler that deposits its water
samples into 1 to 24 containers.
2. Precautions
•
READ AND UNDERSTAND the
Safety
section at the front of this
manual.
• CAUTION: Damage resulting from running the sampler under freezing
conditions will not be covered under the product warranty.
•
Wiring to remote/external sensors should avoid all ac power lines if
possible and/or be run in shielded cable terminating the shield at the ac
ground terminal at the remote site.
•
The intake hose should be 7.6 m (25 ft) or longer. Shorter hoses do not
provide sufficient back pressure to the metering chamber, allowing the
pump to efficiently expel all solids into the sample container.
•
The liquid sensing rod and the volume control tube must be kept clean to
ensure the conductivity necessary to detect the presence of the fluid.
• CAUTION: Do not program the sampler using the generic SDI-12 sensor
option in Campbell Scientific’s Short Cut . The wiring diagram generated
by Short Cut is incorrect for connecting the PVS5120 to a datalogger. It
shows a power wire (12 V) connection that is not necessary for running the
sampler as an SDI-12 sensor. Connecting the control cable’s red wire to
the datalogger’s 12 V terminal causes problems in the sampler. See
Section 8.2.3 , SDI-12 Control
(p. 32)
, for more information.