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<br />00,3288 <br /> <br />Data Archiving <br /> <br />All data collected will be stoted in files designated by the <br />Uset. File names identify the data .for particular sensors, groups of <br />sensors, time intervals, etc. If for any reaSon file data needs to be <br />changed, a data editor allows manual deleting, changing, or insertion <br />of data into the file. Data can then be retrieved from these files <br />and displayed in either text or graphical data. <br /> <br />Stream Flow Rating Curves <br /> <br />Each stream flow sensor in the network may have a raring table <br />defined for it. This table allows a stream flow value to be defined <br />for each water level value at a sensor site. A constant shift factor <br />can be applied to the rating table if required for recalibration. <br />Stream flow values in CFS can then be displayed in text form, or <br />graphically; as shown in Figures 16A and 16B, respectively. <br /> <br />System Configuration <br /> <br />Remote stations must be assigned unique sensor identification <br />codes and sensor types. Initial values and conversion factors must <br />also be assigned. Stations may need to be changed, added, or deleted. <br />Information of this type is handled by the configuration, or database <br />management function of the software. The process is simplified by the <br />use of prompts, or menu-driven instructions, that lead the user step- <br />by-step through the process of defining the system. Each required <br />step is displayed for an operator response such that no steps are <br />missed. Typical configuration menu displays are shown in Figure 17. <br /> <br />Remote Base Station Terminal <br /> <br />Many USers can access the data and the graphical displays from <br />temote terminals. Video terminals can be connected through a modem to <br />the telephone line. All data and displays at the Base .Station can <br />then be accessed from the remote terminal. This allows convenient <br />call-up of data from other locations at any time. <br /> <br />Miscellaneous <br /> <br />Several other <br />user's convenience <br /> <br />features are <br />and protection. <br /> <br />included <br /> <br />in <br /> <br />the sof twar e for <br /> <br />the <br /> <br />1. Each station will report twice per day to ensure the user <br />that equipment is operating even if thete is no sensor activ- <br />ity (no rainfall or no water level movement, for example). <br /> <br />2. The software also has a "watchdog" timer that is set to <br />detect transmissions from each station at certain preset SCan <br />intervals for analog sensors. If the reports ate not forth- <br />coming, a log is kept of all the missing reports from these <br />stations. This log is very convenient for trouble-shooting <br />the netwotk if data s tarts to be missed. <br /> <br />'25 <br />