The South African water resource (DWAF) monitoring network belongs to one of the well organized and managed networks world-wide. Well prepared and maintained measurement sites & stations deliver the data base for the water management in the huge territory of South Africa.
One main issue of the online data availability is the data transfer from remote stations to the data centres. Since mobile GSM networks do not cover all areas of the large territory, the data transmission need to be carried out by other available data transmission services. Meteoburst as the first technology used to transmit data in 1980’s, replaced by the first generation Meteosat DCP systems. New available transmitters with lower power consumption and higher data transmission speed are now available to replace old technology and help to improve the data availability.
Replacement of the installed first generation Meteosat data collecting platforms of the DWAF network with new available data logger and transmitter technology.
Criteria for the equipment selection:
- Flexible station layout – different sensors
- Low power consumption (Bat / solar powered)
- Easy operation / installation & commissioning
The project was divided in 2 phases. The first phase consisted of the system performance test. In the second phase the old stations were replaced by the new stations step by step.
Phase 1: Set-up of two test stations to evaluate the functionality and the performance of the OTT solution.
After the successful test phase a standard layout was defined - this served as standard layout for all further DCPs. Each DCP consists of a data collecting unit OTT LogoSens, the data transmitter OTT HDR, as well as of a power control unit PCU 12 and a lightning protection unit. The data logger serves as master and initiate respectively control the measuring and transmission cycles.
Summary / Look-Out
The OTT METEOSAT DCP solution proofs at around 25 stations its performance. The simple & modular layout, the flexible sensor connect possibility and the low power consumption are the key features that gives the benefit to the customer
- Possibility to connect additional sensors without further investment in the data logger later on
- Low training costs due to easy to use concept
- Reduced repair / maintenance time due to modular system layout