Wet Labs ac-s, Руководство пользователя

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ac-s User’s Guide (ac-s) Revision F 9 Feb. 2006 5
1.5 System Requirements
This section explains the basic system components necessary to operate the ac-s. Note
that components will vary depending on whether the ac-s is used for profiling, on a
mooring, or underway flow.
Instrument
The ac-s and its flow tube assembly form the basic optical sensor.
Pump
The flow-through system will typically require an ancillary pump to assure proper
operation. Pump requirements depend upon desired flow rates, required depth of
operation, power availability, and existing hardware.
Cabling
The ac-s requires a minimum of four conductors for power and RS-485 output. (Three
conductors for RS-232 output).
Power Supply
The ac-s requires a 10–35 VDC supply, capable of providing a minimum of 10 watts
continuous output. Additional wattage will be required to also drive a pump from the
same supply. If a longer cable is used, power losses must be accounted for in determining
the power supply voltage and power requirements.
Serial Communications
Data from the ac-s is transmitted via both RS-232 and RS-485 depending on which
sockets are connected to the instrument’s bulkhead connector. Regardless of the mode of
transmission you use, you must have a serial interface on your computer or data logger
capable of accepting data from the instrument at a rate of 115,200 baud. If you have an
instrument with RS-485 output and are using a computer with standard RS-232
communication ports or USB ports, optional protocol converters can be readily obtained.
Host/Data Logger
The ac-s can be interfaced to any computer or data logger capable of supporting a
115,200 baud rate serial interface. If you plan to use our WETView software acquisition
package you will need a computer running Windows 95 or newer.
Software
The WETView host software package interfaces directly to the ac-s via your computer
serial port. WETView allows real-time graphical visualization of the data in any of
several ways such as a function of time, depth, or wavelength. WETView automatically
applies calibration constants, temperature corrections and generates a tab-delimited
ASCII text file that can be imported into programs such as Excel or MatLab for post-
processing or manipulation.