Campbell PC208W Manual de usuario descargar pdf (Pagina 9)

Manual

Detailed Outline of Data Trajectory

2.1 General

This chapter gives an overview of the complete track a measurement value has to go from sensor to final storage

in the Lake Victoria Basin Database (LVBD). It presents the various hardware and software components involved in

this process, together with their interconnection. Furthermore, it lists sequentially all user actions that play a role

in the data trajectory.

2.2 Hardware

Figure 1 presents all hardware components involved in the route from sensor to PC in the hydro-meteorological data

acquisition process

Detailed Outline of Data Trajectory

The various hydro-climatological parameters are measured using electronic sensors. Depending on the nature of a

parameter, its value is represented by either a voltage or a sum of pulses.

The datalogger measures the voltages and/or counts the pulses, and transfers them to intelligible figures in

standard units, like for example degrees Celsius for temperature or mm of rainfall for precipitation. Other tasks

of the datalogger are to activate the various sensors at pre-defined intervals, and store the measurements in its

memory.

The CR10KD keyboard display is used to communicate with the datalogger on site. For instance, in case the user

wants to invoke manual data transfer this is accomplished by connecting the CR10KD to storage module and logger,

and typing in the proper commands.

The SM192 storage module is used to transfer the accumulated raw data from datalogger on site to Personal

Figure 1: Hardware components involved in data acquisition process.

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Campbell PC208W Manual de usuario Pagina 9