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City of Arden Hills <br />Technical Memorandum – SCADA System Recommendations <br />Page 4 of 8 <br /> <br /> <br />the Owner is interested in monitoring only, the current cellular monitoring only would be deemed sufficient <br />and cost effective. Unless the City is convinced that converting to private frequency now is better now than <br />10 years later, the new system cannot be justified on economics alone. <br /> <br />By opting for radio or Cellular telemetry only where needed, the costs are reduced and monitoring can be <br />accomplished via a matching OmniSite unit at the Booster Station. <br /> <br />3.2 All New Monitoring Software <br />If the above recommendations are accepted, and the Owner is satisfied with the information they receive <br />via OmniSites’s Guard Dog software, there is little economic justification for changing to another monitoring <br />software. There are more feature-rich monitoring software options available but this is at a significant cost. <br />Wonderware Insight is a well-designed, feature-rich program but costs ~$2,000/year/100 data points. This <br />software would have no problems collecting data from the existing OmniSite cellular modems but additional <br />alarming software may be required for operation’s cell phones, depending on features desired. <br /> <br />4. SUMMARY/CONCLUSIONS <br /> <br />The Engineer has taken an approach of, “If it isn’t broke n, don’t fix it”. While there are bells and whistles <br />that could be added with new equipment and software, the Engineer’s interpretation of the City’s desires is <br />to keep it simple, and reliable. While some modifications are necessary to improve communications <br />reliability, the changes are relatively small. <br /> <br />