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|Modèle :||GammALERT SYSTEM|
The GammALERT SYSTEM can be made up of one or more Remote Measuring Stations that would store and transmit gamma radiation levels in the air as well as alarms to a Central Receiving Station and /or to the Civil Protection Authorities in case of an event.
The Remote Measuring Station consists of two main parts:
Both the GammaMETER-RS04 and the GammaDATA-2000C unit that configure the Remote Radioactive Monitoring Station, are described below.
|The Gamma detector, type RS04 has been designed for measuring radioactivity of gamma radiation. It is calibrated in the quantity of "ambient dose equivalent rate" [H*(10)], its measuring range comprises 9 decades (from 10 nSv/h up to 10 Sv/h). This wide measuring range permits detecting minor changes in the ambient natural radioactivity as well as measuring high dosage rates. The detector is available in two versions: type RS04/H for wide energy range and type RS04/L for low energy range.|
|The GammaMETER RS-04 consists on a proportional counter tube of type NPGD02. A large number of these counter tubes have been in operation in several European countries for many years and have set a new worldwide environmental surveillance standard.
This specific model is unique as it is the only that is able to cover a 9-decade measuring range with a single detector.
One of the major advantages is that the counter tube's sensitivity to natural ambient radiation is rather high despite its wide measuring range. The tube’s durability is practically independent of the number of pulses. After a high dose irradiation the detector can be regenerated automatically by a one month refresh (out of operation).
The signal processing unit was developed on the basis of extensive experiences gained over many years. This microprocessor processes the signals of the detector tube, converts them into the quantity of ambient dose equivalent rate [H* (10)], controls continuously the operation of the detector, stores the measured data and ensures the communication between the detector and Gamma Data-2000C Unit.
An extra stable high-voltage unit ensures the solid operation of thecounter tube . Additionally all electric in- and outputs are equipped with special protection filters (NEMP* ) providing excellent lightning protection.
The complete equipment of the detector is housed in a waterproof aluminum tube with a wall thickness of 2 mm. The connector is waterproof, too.
* Nuclear Electromagnetic Pulse
|Proportional counter, Type NPGD 02 with energy compensation|
|Type C8051F022 Silicon Labs, compatible with Intel 8051|
|Measuring range||10 nSv/h ÷ 10 Sv/h||10 nSv/h ÷ 15 mSv/h|
|Energy Range||H*(10)≤ 30 mSv/h: 40 keV ÷ 3 MeV||40 keV ÷ 3 MeV|
|(±30%, ref. Cs-137)||H* (10) > 30 mSv/h: 100 keV ÷ 3MeV|
|Temperature Range||-30°C ÷ +70°C|
|Temperature Depence||H* (10) ≤ 1 mSv/h: ±3%|
|H* (109 > 1 mSv/h: -20%, +50%|
|Measuring uncertainty||H* (10) ≤ 1 Sv/h: ±10%|
|H* (10) > 1 Sv/h: ±15%|
|Output||RS-232 or RS-4851|
|Real time clock||Yes|
|Data Storage memory||Yes|
|Real time data||Yes|
|Power Consumption||max. 50 mA (10,5VDC ÷ 13,8 VDC)|
|Dimensions||Ø76 mm x 500 mm|
|Weight||ca. 2,5 kg|
|Reader||Infrared communication via bottom of the dosimeter|
|Button functions||Front panel push button has the following selectable functions|
|change display priority (dose/dose rate)|
|reset integrated dose|
|change alarm thresholds|
|activate battery test|
|Temperature range||-20 - + 50° C operational, humidity up to 90% RH, non-condensed; -20 - + 70° C storing|
|Dimensions||78 x 67 x 22 mm|
|Weight||80 g (including battery)|
Adjustable parameters in type RS04/232 and RS04/485:
Available data and parameters:
Model GammaMETER 3000C
|Model GammaDATA-3000C is an automatic Data Acquisition and Transmission Unit, specially designed for outdoors installation in remote unattended areas, with the possibility of building radioactive environmental monitoring networks, comprising an undetermined number of field stations, and one or more Central Stations for receiving, storing, presenting and processing environmental gamma ray data and alarms generated by the Gamma Meter detector connected to this unit.
Gamma ray data and alarms can be transmitted from the Remote Measuring Station to Central Station using any of the communication options and alternative available such as: cellular networks GSM/GPRS/CDMA, point-to-point radio link, Ethernet connection, and also via satellite (INMARSAT, GOES, IRIDIUM, ARGOS, etc...). From the Central Receiving Station it is possible to manually or automatically get data and alarms in real-time from each and every one of the remote measuring stations, as well as remotely program all their functionalities.
Data transmission using TCP/IP and FTP protocols is also possible as shown in the following communication diagrams:
|Such flexibility on the communication ports, inputs and outputs and memory capacity, allows the system to be connected to a large number of different sensors like anemometers, visibilimeters,rain gauges, etc., and also noise processors or digital cameras for image acquisition and transmission. The Data Recording and Transmission Unit is mounted on a IP-67 Polypropylene housing (dimensions 41x33x18cm). Batteries, charge regulator, communications modem, keyboard and visual display (optional) are all also enclosed into the same cabinet.|
Inputs/Outputs (total 16, plus 4/6 serial ports):
Communication Ports (4 standard; 6 optional):
Depending on the user requirements, Unit is capable of transmitting the data to the central facility in several ways:
|In the Central Station a typical configuration includes the following elements:
|A very valuable option offered by GEONICA with the GammALERT SYSTEM, is the possibility of WEB Posting, in such a way to provide worldwide access via INTERNET to the historical and instant values of all the parameters measured at the remote station.
Data visualization in Internet is possible thanks to WEBTRANS Ubiquitas Application. User is granted to access of his account and look at the traffic parameters any number of remote terminals (number of stations depends on the server configuration).