|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
DATA COLLECTION AND TRANSMISSION SYSTEM
1. Purpose and objectives
The HYDROSENS Data Processing System is designed for the collection,
storage and ransmission of measured values in the field of hydrology and
meteorology in remote areas. The future-oriented system combines powerful
features in datalogging and data transmission with simple and modular
Up to 120 measuring sensors connected to the system are interrogated
at adjustable time intervals (sample and storage intervals between 10
seconds and 24 hours, delta-log capability, alarm management, etc.) and
the measured values, together with time, are stored in a rollover-type RAM
The measuring station can be connected either to the public telephone network by means of a serial modem /GSM or to satellite systems (Meteosat,Goes, Inmarsat, etc.), radio, or dedicated line, offering the possibility to have the measured values called by a central station (computer/PC) automatically. Additional communication setup can be done at site via optical interface (infrared technology) using an IBM-compatible notebook or the Multifunctional Field Unit VOTA from OTT MESSTECHNIK.
Measured values and system parameters can directly be displayed by a
liquid-crystal display. If required, the measured values can be
pre-processed at the measuring station. Such a pre-processing provides
averaging of data, supervision of minimum/maximum values, as well as scaling
of data. Since the whole system is controlled by microprocessors, it is very
flexible and suitable to meet quite different technical requirements and
Standard input cards for all common sensor types of different
manufacturers (analogue, 4..20 mA. SDI12, 1..5V, Impuls, mV, digital, RS232,
RS485, etc.). One station comprises from 1 up to 120 different sensor inputs,
connected together via CAN-BUS (two wires).
The system provides different, galvanically separated measuring signals via different output cards for further processing in an external system.
Different output cards can be chosen, for example:, 4..20 mA. 1.5V, digital,
RS232, etc. The output signals are used for automatic flood warning.
Additionally, it is possible to attach a measured value announcer to the data
5. Operational requirements and restrictions
The equipment must be set up in protection housing. The low power consumption allows 12 V DC power supplies by a rechargeable battery, solar
supply or mains. The compact HYDROSENS housing with integral LC-Display and
a key path for in-situ parameterisation accommodates different HYDROSENS
components and allows easy operation.
6. Form of presentation
Equipment with pamphlet and operating instructions in German, English,French, and partially in Spanish. See www.ott-hydrometry.de for further information.
7. Operational experience
HYDROSENS has been installed in many sites in Germany, other parts of Europe as well as in several other countries of the world, e.g.:
1. MoWaFo Pretoria, South Africa: approximately 400 field stations,used primarily for water level, temperature, conductivity and partially for precipitation acquisition (flood forecast measuring network).
2. Bundesanstalt für Gewässerkunde, Koblenz: approximately 200 field stations, used primarily for acquisition of water-level values, temperature, precipitation and other water quality and/or
3. MWR Sultanate of Oman: approximately 45 rainfall stations and wadi stations.
8. Originator and technical support
OTT MESSTECHNIK GMBH & CO.KG - Germany, PO Box 2140, D-87411 Kempten, Germany. Web page:www.ott-hydrometry.de
10. Conditions on use
Informative material is available free of charge. Instrument is for sale.
|(First entered: 23 FEB 81||
Last updated: 3 JUN 99)