Wireless adoption in the African water industry is growing.
Municipalities use wireless telemetry to overcome constraints imposed by cabling over long distances in order to reach remote sites. Pump stations and reservoirs are classic examples of remote sites that use data connectivity over radio links. Information relating to operational status gets fed back to a central station (typically running scada software) for monitoring and control in order to maximise process efficiencies.
However, downtimes could result in unacceptable interruption of service delivery – eg, no water to the consumers. For this reason, modern telemetry systems need to be robust and contain a high level of self-diagnostics and may even use meshing: a technique whereby a signal automatically finds a communications path even during periods where a station may have an outage. If, for example, an antenna is damaged due to vandalism, the ability of the radio system to indicate a communications faults is critical.
Tabateq uses radio telemetry systems designed by Elpro Technologies to ensure the radio communications channel is optimised and fault reports via integrity signals are sent and monitored. Elpro’s Ethernet modems also feature diagnostic registers that can be read directly from a scada using Modbus TCP. Monitoring signal strengths and alarming pre-emptively have become standard features in Elpro’s gateways to ensure maximum uptime and availability.
Radio communications in industry used to be the exclusive domain of RF experts. Elpro’s radio technology is maturing to a point where the radio complexities are neatly tucked away and user-friendly interfaces are provided for configuration and maintenance. Elpro has developed its radio telemetry with ease of expansion and maintenance by the user in mind using Windows-based software. This allows users to configure and expand complete systems as it is possible to mix radios with direct industrial fieldbus interfaces (eg, Modbus, Ethernet/IP, Profibus) and conventional telemetry units within the same system.
Tabateq says it has used the technology to facilitate wireless automation projects in many parts of Africa including Ghana, DRC, Namibia, Botswana and Kenya. Botswana Water Utilities have adopted Elpro for its automation applications throughout the country based on its reliability and ease of implementation, underlining the fact that modern radio telemetry systems are gaining acceptance in the African water industry.
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