Rainfall, Water Level, Velocity, Discharge and AWS was developed with hydrographical services in mind, that are required to establish dense networks of rain gauge stations and others to improve flood warning and civil protection. This RTU is as suited to monitor rain and water level in other applications such as agriculture
Rainfall, Water Level, Velocity, Discharge and AWS features ports to connect to a pulse output of e.g. a rain gauge or a water meter. The RTU can collect data in two different ways: either pulses are totalized over a user-programmable time slot, or every single pulse is time-stamped, a requirement for rain intensity monitoring.
Data transmission is done through the integrated quad-band GPRS modem
Functions:
Automatic acquisition of hydro-meteorological data: it would be possible to set acquisition intervals independently for each acquisition channel, and configure the sensors as required
Data processing: it would be capable of doing local conversion of measured variables in order to provide reliable data in standard hydro-meteorological engineering units
Data storage: it would be possible to store in a memory at least six (6) months of 5-minute data for each parameter (rainfall, water level, and station health parameters such as battery voltage).
Self-diagnosis and supervision: it would be able to gather and report alarm conditions upon exceeding set rainfall and water level warning levels, or of failures with connected devices.
Programming and display: it would be able to program the unit at the field site and display live as well as stored data readings using a remote device. An integrated display and/or integrated keyboard are optional.
Specifications
Item
Technical specifications
Site conditions
Ambient temperature: 5 to 55 degrees C
Relative humidity: 10% to 100%,
Altitude: 10 to 1000 m
Data logger
Proven and widely used model.
Open design, operating with a wide variety of sensors
Multi tasking operating system capable of simultaneous data collection and transmission
Change of setup do not affect logged data
Plug and play ease of setup using a windows based graphical views
Non-volatile Flash memory that can one store year of data and expandable to a minimum of 1GB
ADC resolution ≥ 16 bit
individual recording intervals
User configurable alarms (triggering)
Multi-tasking operating system-must log data and transmit at same time
Monitoring of voltage level
Internal clock with drift less than 2 seconds per day (can be accomplished with GPS specified below)
GSM/GPRS
TCP/IP type capable of sending data based on threshold as well as responding to queries through GPRS
Input/ Output
Can used with AWS, 8 analogue channels and 8 digital input / output channels needed
Can used with only rain gauge single counter input might be sufficient
For water level/velocity/discharge recorder digital input through RS485 or 4-20 mA
Output needed for:
permanent connection to transmission unit
manual readout/connection to data retrieval computer
Housing for equipment
Protection IP65 (NEMA 4) or better
Chain link fence with barbed wire
Software
Windows software for system configuration / communication
English language version
All required licenses included
Different user levels, system of user rights / passwords, access restricted to authorized personnel
Data security: Redundant storage, periodic automatic backup procedures
System integrity check procedures
Accessories
Serial cable + adaptor (if required) for notebook connection
All accessories (fixing units, etc.) as required
Power Supply
Item
Technical specifications:
Site conditions
Ambient temperature: 5 to 55 degrees C
Relative humidity: 10% to 100%,
Altitude: 10 to 1000 m
Solar power supply
Common power supply for data logger, sensors, and transmitter
Input power 12 V solar photo voltaic system with the capacity to power all equipments associated with the station
The solar panel and battery is sized according to the needs of the equipment provided and ensure at least 30 days of full operation without recharge (one months of operation without transmission).
Including voltage / charge regulator, a solar regulator for each station to regulate power and maintain optimum battery and data collection platform operation
With battery test indicator
Lightning protection
All devices for lightning / over voltage protection of sensors, data logger, transmitter and solar power supply equipment to be included
Accessories
All accessories (fixing units, etc.) as required
Include battery chargers (in: 230 V AC / out: 12 V DC)
Tools
Complete tool kit for installation and routine maintenance giving full detail( number of pieces and type)
Enclosure / Shelter
Enclosure for equipment
To accommodate data logger, sensor cards, battery and regulator, transmitter unit, over voltage protection devices, etc.
Material should withstand hostile environment and provide protection against vandalism and be agreed with the purchaser.
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