Blocks of detection are intended to measure the power of the ambient dose equivalent Å*(10) of gamma radiation and are used with free-running devices(BDMG-200UD; BDMG-200SD), and systems monitoring the radiological situation.
Output signal corresponds to the standard interface:
• RS – 485 – detection unit BDMG-200 PD
• RS – 422 – detection unit BDMG-200 DD
• RS – 232 – detection unit BDMG-200 SD
• USB 1.1 – detection unit BDMG-200 UD
The contents and the format of the data are defined in the report of the information exchange DiBUS (www.doza.ru)
SPECIFICATIONS
1. Energy range of detected gamma radiation is from 0,06 to 3,0 MeV.
2. Measuring range of ambient dose equivalent H*(10) of gamma radiation is
from 0.1 mkZv / h to 10 Zv / h:
3. The measuring range is divided into two, automatically switching, sub-ranges:
– Subrange “sensitive” channel – from 0.1 mkZv • h-1 to 2.0 mkZv • h-1;
– Subrange “rough” channel – from 0.5 mkZv • h-1 to 10 Zv • h-1.
4. Sensitivity *: “sensitive” channel – (4,4 ± 0,44) c-1/mkZv∙h-1
“Rough” channel – (5,0 ± 2,0) c-1/mkZv∙h-1.
5. Limit of basic relative error of the block is ± 20%.
6. Energy dependence * in the range from 0,06 to 1,25 MeV is no more than 30%
7. Algorithm for processing measuring data is a method of “moving average”. Integration time is 40 seconds. Exposure – 1.
8. Dimensions of the unit: diameter is 40 mm, length is 250mm.
9. Mass of the block is not more than 0,5 kg.
* Radiation of radionuclide cesium-137 (662 keV).
ELECTRICAL CHARACTERISTICS
Power supply – is DC voltage from 7,0 to 12,6 V (detection unit BDMG-200UD – 5,0 V). Consumed current is not more than 10 mA.
Designation of the connector’s contacts (plug RS-10) block BDMG-200PD (RS-485).
|
|
Contact |
Signal designation |
Commentary |
|
1 |
+ Uп |
7,0 – 12,6 В |
|
|
2 |
f 1 |
Negative pulses from the output of the “rough” channel with an amplitude of about 5.0 V, and duration of 1.5 ms |
|
|
3 |
f 2 |
Negative pulses from the output of the “sensitive” channel with an amplitude of about 5.0 V, and duration of 1.5 ms |
|
|
4 |
TR+ |
Direct data |
|
|
5 |
TR- |
Inverse data |
|
|
9 |
┴ |
Screen is connected to contact 10 |
|
|
10 |
┴ |
General is connected to contact 9 |
Designation of the connector’s contacts (plug RS-10) block BDMG-200UD (USB 1.1).
 |
Кон такт |
Наименование сигнала |
Комментарий |
|
2 |
D- |
Inverse data |
|
|
3 |
D+ |
Direct data |
|
|
7 |
+Uп |
Supply voltage is +5V |
|
|
9 |
┴ |
Screen is connected to contact 10 |
|
|
10 |
┴ |
General connected to contact 9 |
