Flexible and reliable multi-channel system for environmental and area radiation monitoring of large radiation-dangerous and radiation-sensitive targets
Features
| - Gamma radiation smart probes |
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| - Independent measurement in each channel withtin a wide dose rate measuring range |
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| - Normal and emergency operation modes |
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| - Specifying alarm threhsolds for each smart probe |
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| - Audible and visual alarm at threshold exceeding |
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| - reliable data transfer by telephone lines and radio channels |
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| - Permanent indication updating every 10 min |
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| - Digital data retransmission |
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| - External indication board |
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| - UPS (Uninterruptible Power Supply) |
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| - Full addressing diagnostics of equipment operability |
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| - Independent information databases at each automatic measuring posts |
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| - Calibration without demounting smart probes |
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| - Wind direction and speed, precipitation and temperature sensors |
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Application
Automatic measuring post (AMP)
Smart probe AT2343 provides absorbed gamma radaition dose rate measuring in the range from 25 nGy/h to 10 Gy/h. Two-chamber Geiger-Muller counters are used as detectors. Data from a smart probe is transmitted to a uniform terminal controller by RS485. Wind speed and direction sensor, precipitation sensor and temperature sensor, external indication board can be connected to the terminal controller. It is possible to provide the terminal controller with a radio unit, a radio station, a radio mast with TL antenna and (or) a telephone unit taking into account communication channels in use. Applied software of automatic measuring post provides digital data forwarding, so it is possible to extend automatic measuring post network to big distances. The system supplies from an uninterruptible power supply. There are two operation modes: an economical mode for operation under normal environment and the mode with frequent data transmission for operation under emergency radiation surrounding. It is possible to create independent databases and maintain data keeping for more that a year due to the nonvolatile memory.
Local response center (LRC)
PC is used as the central control unit, which is delivered together with the terminal controller. Applied software runs under Windows® and provides system configuration, data readout and its processing. There are a map of controlling area and dose rate value in control points on PC display. Dose rate values can be presented as a table or a graph with value averaging for any time period. The processing algorithm detects a sudden dose rate change and switches the emergency operation mode as a result. Alarm threshold exceeding in any smart probe or failure of any system unit are displayed on PC as color zones and accompanied by audible alarm. Acquired from smart probe dose rate results are kept in the datatbase.
Specification
| Number of detectors in smart probe |
6 |
| Number of smart probes connected to AMP |
from 1 to 32 |
| Number of AMPs |
from 1 to 128 |
| Absorbed gamma radiation dose rate measuring range |
25 nGy/h - 10 Gy/h |
| Smart probe sensitivity on 137Cs |
15000 cnt/µGy |
| Gamma radiation energy range |
0.05-1.5 MeV |
| Intrinsic measurement error |
± 15 % |
| Interface |
RS 485 |
| 3-level audible and visual alarm |
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| Operating temperature range |
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| smart probes and open-air device |
-35 - +50°С |
| inside units |
+5 - +40°С |
| Maximum distance between a smart probe and terminal controller |
1000 m |
| Radio channel communication range between automatic measuring posts at plain ground |
up to 30 km |
| Protection class |
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| smart probes |
IP57 |
| other units |
IP54 |
| Radio disturbance |
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| CEI/IEC CISPR 22:1997 |
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| Electromagnetic compatibility |
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| CEI/IEC 61000-4-2:1995 |
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| IEC 61000-4-3:1995 |
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| Power requirements |
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| AC mains, 220 (+22; -33)V, 50±2 Hz |
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| In case of emergency power interruption - accumulator battery 12.6 (+1.3; -1.6) V |
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