YSI Vertical Profiler Systems - Manual (Page 5)

YSI Profiler System USER Manual
The YSI Profiler System may be configured in a fixed station version as shown in Figure 1-2.
Here the YSI 6955 Winch Assembly is mounted to a pylon and the YSI 6961 Controller
Assembly is rail-mounted and housed inside a NEMA enclosure.
Figure 1-2 YSI Profiler Fixed Mount Version: mounted to pylon and guard rail
The YSI 6960 (or 6961) Controller is the heart of the system. It includes a Campbell Scientific
CR10X-2M data logger, an SDM SIO4 module, a motor control system (with two relays), a
watchdog timer and a communication module. These components are housed within a watertight
enclosure to protect the electronics from the environment. In Figure 1-4, gray shaded
components are those housed within the enclosure. Note that variable water depth can be
monitored by the Depth Sounder or a Fixed Reference Sonde depending on the deployment
requirements.
The CR10X program executes commands that collect information from the sonde and various
peripherals. This information is then used by the CR10X to strobe its I/O ports and performs
mechanical actions, such as energize the power relay that controls the winch motor to move the
sonde to a new location in the water column.
The YSI 6955 Winch Assembly is driven by a 12 VDC motor. The Winch Assembly includes a
reinforced Kevlar® sonde cable that is approximately 0.3 inch in diameter and 15 meters in
length for vented cables. For non-vented cables sonde cables the diameter is approximately 0.25
inch with lengths from 30 to 100 meters. The Winch Assembly is primarily composed of PVC
and Delrin® parts to maximize resistance to environmental damage. The motor is a small
horsepower motor geared down to lift the required weight of a YSI sonde (including attached
weight and cable). The total weight of the sonde in water is about 8 lbs. The motor is coupled to
the drum axle via a robust planetarium gear assembly that incorporates a 90 degree gear coupler.
The Motor Control Circuit Breaker module is controlled by the CR10X. It functions as the main
power OFF/ON to the motor and as a current limiter. In the event the motor draws excessive
power, the current increases. Once it reaches a set threshold the module terminates motor power.
YSI Environmental 669523 Rev B Page 1-2