AT1117M Radiation Monitor

This radiation monitor package is designed to:
 

  • with BDKG-24: For measurement of gamma and X radiation ambient dose equivalent and ambient dose equivalent rate
  • with BDKG-30: For measurement of air kerma and air kerma rate.

It can be operated both as transportable and portable instrument. In transportable version all probes are attached to a tripod-mounted bracket, and can be easily extracted without special tools to be used as a portable variant.

Consisting of:

  • BDKG-24 or BDKG-30 Gamma radiation smart probe
  • PU2 Processing unit
  • Tripod
version1 version2 version3
 
Radiation monitors can be used to:
- With BDKG-24: For measurement of gamma and X radiation ambient dose equivalent and ambient dose equivalent rate
- with BDKG-30: For measurement of air kerma and air kerma rate.
It can be used both in transportable and portable configuration.
In transportable configuration detection and control units are attached to a bracket mounted on a tripod, and can be easily extracted without special tools to be used as a portable variant.
 
 
Operating principle
 
Operating principle is based on highly sensible scintillation measurement method with lead-filled plastic detector of Ø50х40 mm size.  Depending on selected type of instrument either processing unit or hand-held PC can be used as a control and display tool.
 
1) PU2 Processing unit
Detection unit sends data over cable to PU2 processing unit, where it is displayed on LCD screen.
PU2 can record and store into memory up to 99 measurement results, which can be further uploaded to a personal computer via dedicated application software. Sound and visual alarms activate when user-adjustable threshold levels are exceeded. Operation algorithm provides measurement continuity and real time statistical processing of measurement results.


 
 
2) Hand-held personal computer (HPC)
Data is transmitted from detection unit to HPC by Bluetooth (BT-DU4 Interface adapter) or cable.
Not only HPC has almost all PU/PU2 functions, but also offers some advanced features:
▪ GPS referencing of measurement results
▪ Automatic recording and storing over 10,000 measurements with GPS referencing
▪ Charge indication for HPC and Interface adapter batteries
▪ Loading data to PC for further analysis and processing by professional GARM software (Option)
▪ Automatic data transfer to a remote server by "ARMS" software [Via FTP server; 3G modem or Wi-Fi module shall be available on HPC] (Option).


 
 
 
Application
 
▪ Radiation monitoring of environment
▪ Monitoring of radiation environment on nuclear power plants and facilities
▪ Radiation monitoring of premises adjacent to X-ray and gamma-ray units
 
 
Features
 
▪ High sensitivity
▪ Quick response to changes in radiation environment
▪ Wide measurement range
▪ Wide energy range
▪ Perfect anisotropy in full energy range
▪ Integrated stabilisation and performance monitoring systems
▪ Sound and visual alarm for exceeded threshold levels
▪ Operation in harsh weather conditions
▪ Wireless connection of detection unit to hand-held PC at distances up to 10 m

 

 

Version 1

Version 2

Version 3

Components

▪ Detection units BDKG-24 or BDKG-30

▪ PU2 Processing unit

▪ Cable

▪ Tripod with a bracket

▪ Detection units BDKG-24 or BDKG-30

▪ Hand-held personal computer (HPC)

▪ BT-DU4 Adapter

▪ Tripod with a bracket

▪ Detection units BDKG-24 or BDKG-30

▪ Hand-held personal computer (HPC)

▪ Cable

▪ Tripod with a bracket

 

Controls and indicators

PU2 [Version 1]

HPC [Version 2, 3]

Registered radiation

Gamma radiation

Gamma radiation

Detector

Geiger-Muller counter tube

Geiger-Muller counter tube

Energy range

60 keV – 3 MeV

60 keV – 3 MeV

Measurement range of ambient radiation dose rate equivalent:

1 µSv/h – 10 mSv/h

1 µSv/h – 100 mSv/h

Measurement range of ambient radiation dose equivalent

1 µSv – 1 Sv

1 µSv – 10 Sv

Energy dependence relative to 662 keV (137Cs)

From -25% to +35% (For energy range from 60 keV to 3 MeV)

±25% (For energy range from 60 keV to 3 MeV)

Sensitivity to 137Cs gamma radiation

1.0 cps/µSv·h-1

0.3 cps/µSv·h-1

Response time for dose rate change

≤2 s
(For dose rate change from 1 to 10 µSv/h).


≤7 s

(For dose rate change from 1 to 10 µSv/h).

Limit of intrinsic relative measurement error

±20%

±20%

Protection rating

IP64

IР67

Overall dimensions, weight

200x85x36 mm, 0.5 kg

260х87х39 mm, 0.6 kg

 

Detection unit*

BDKG-30

BDKG-30

Registered radiation

Gamma radiation

Detector

Scintillation plastic, Ø50x40 mm

Energy range

30 keV – 3 MeV

50 keV – 3 MeV

Measurement range of ambient radiation dose rate equivalent

20 nSv/h – 1 Sv/h

-

Measurement range of ambient radiation dose equivalent

1 nSv – 100 Sv

-

Air kerma rate measurement range

-

20 nGy/h – 1 Gy/h

Air kerma measurement range

-

1 nGy – 100 Gy

Limit of intrinsic relative measurement error

±20%

Energy dependence relative to 662 keV (137Cs)

±25%

Maximum anisotropy

±20%

241Am (59.5 keV) for angles ±120о

137Сs (662 keV) for angles ±150о

Sensitivity to gamma radiation, minimal

cps/µSv∙h-1

cps/µSv∙h-1

241Am

3200

2800

137Cs

530

600

60Co

270

290

Response time for dose rate change from 0.1 to 1 µSv/h (µGy/h)

≤3 s

Protection rating

IP64

Overall dimensions, weight

Ø60x200 mm, 0.5 kg

Ø60x200 mm, 0.6 kg

* BDKG-24 (BDKG-30) detection units can be replaced by any detection unit from АТ1117М radiation monitor set (except BDKN-03)

 

AT1117M Radiation monitor: General characteristics

Power supply

 

- Detection unit

1) By PU2

2) By BT-DU4 adapter

3) By HPC

 

- PU2, HPC, BT-DU4

1) By integrated rechargeable batteries

2) By +12 VDC power source

3) By 230 VAC 50 Hz power source

Time of continuous operation on rechargeable battery power

Minimum 24 h (With PU2)

Minimum 12 h (With Handheld PC)

Interface

 

- Connection of detection unit to PU2

RS 232

- Detection unit to HPC

Bluetooth (BT-DU4 Interface adapter), RS 232

Relative air humidity with temperature ≤35°С without condensation

≤95%

 

Radiation monitor meets requirements of GOST 27451-87 (Ionizing radiation measuring means), safety requirements of IEC 61010-1:2001

and Electromagnetic compatibility requirements of EN 55011:2009, IEC 61000-4-2:2008, IEC 61000-4-3:2008, IEC 61000-4-4:2004+A1:2010, IEC 61000-4-6:2008

The Radiation monitor is listed in national registries of measurement instruments of Republic of Belarus, Russian Federation, Ukraine, Kazakhstan, Uzbekistan, Azerbaijan and Turkmenistan.

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