Doza BDMN-200 User manual

Scientific Production Company “Doza”
DETECTORS BDMN-200
User Manual
AJAH.418266.007RE

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Content
1 Description and operation of the product ………………………………….. 3
1.1 Product functionality …………………………………….………… 3
1.2 Technical characteristics …………………………………………... 3
1.3 Configuration ………………………………………….…………… 5
1.4 Design and operation …………....…………………………..……... 5
1.5 Marking and sealing …………………...…………………………... 7
1.6 Packing ……………………………………………………...……... 7
2 Intended use ………………………………………………………..…….… 7
2.1 Operational limitations ……………………………………..……… 7
2.2 Preparation of the product for use ..………………………...……… 7
2.3 Use of a product …….….….……………………………….………. 8
2.4 Adjustment ………………………………………………………… 8
3 Maintenance ………………………………………………………...……… 8
3.1 General notes ………………………………………………..……... 8
3.2 Safety precautions ……………………………………………….… 8
3.3 Maintenance routine ……………………………………...………... 9
4 Calibration routine ………………………….……………………………… 9
4.1 General requirements …………………………….….……………... 9
4.2 Preliminary arrangements ……………………………….………..... 9
4.3 Safety precautions ……………………………………………….… 10
4.4 Conditions …….……….………….……………..………….……… 10
4.5 Procedure ………………………….…………..…………………… 10
5 Routine repairs ……………………………………………………………... 11
6 Storage ……………………………………………………………………... 11
7 Transportation ……………………………………………………..……….. 11
8 Disposal …………………………………………………………..………... 11
Appendix A Description of data exchange registers
using the DiBUS protocol ………………………………….………………… 13
Appendix B Wiring diagram ……………………...………………………...... 16
Appendix C Outline drawing …..…………………...………..……………..... 17
Appendix D Software “TETRA_Checker” User Manual ……………….…… 19

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This User Manual contains information on design, principle of operation, characteristics of the
product and instructions essential for correct and safe use of this product (intended use, maintenance,
servicing, storage and transportation), as well as information regarding the utilization of the product.
1 DESCRIPTION AND OPERATION OF THE PRODUCT
1.1 Product functionality
Detectors BDMN-200 AJAH.418266.007 (hereinafter detector) are intended for measurement
of the ambient equivalent dose rate of neutron radiation


10
*

 (AEDR).
Detectors are used for monitoring of radiation environment at the industrial facilities: nuclear
plants, enterprises for radioactive waste conditioning and management and nearby areas, as a part of
systems, complexes and installations for radiation monitoring.
Detectors convert AEDR into electrical pulses with frequency proportional to the AEDR value.
The conversion function is determined as


  10HМK
10H
N*
*



, (1.1)
where N – frequency of pulses, s-1;
K – sensitivity coefficient, Svh-1s;
M – “dead time”, s.
Registration of pulses and calculation of the pulse frequency to the AEDR units are performed
by the detector’s microcontroller. Data format of the AEDR value at the output of detectors is defined
by the DiBUS exchange protocol that provides possibility of data transfer to the external devices
intended for visualization, storage, and alarm signalling. Details on DiBUS protocol are presented at
www.doza.ru.
Detectors are manufactured in modifications that differ by data exchange interface:
BDMN-200DD AJAH.418266.007 - interface RS-422, BDMN -200PD AJAH.418266.007-01 -
interface RS-485.
1.2 Technical characteristics
1.2.1 Energy range of measured neutron radiation …….…..……….…..….. 0.025 to 10.0 MeV.
1.2.2 Measurement range of the AEDR of neutron radiation ………… 0.1 μSv·h-1 to 0.1 Sv·h-1.
1.2.3 Limits of the permissible basic relative measurement error of AEDR of neutron
radiation ..…………….…………………………………………………………….………...….. 25 %.
1.2.4 Energy dependence for typical neutron spectra relative to the value obtained with neutron
spectrum of Pu-Be source ………….……………………………………………………………. ±40 %.
1.2.5 Detector’s warm-up time ….……………...….……………………... not more than 1 min.
1.2.6 Continuous operation without limitation of number of turning on/off ................ unlimited.
1.2.7 Instability during 24 hours of continuous operation relative to the mean value of readings
for this period ..……………………………………………………………...…… not more than ±10 %.
1.2.8 Power supply voltage (DC) .....…..……………..…………….….…..……….… 0,30
0,4
12
 V.
Limits of complementary measurement error of AEDR of neutron radiation due to changes of
power supply voltage relative to the measurements at nominal voltage …………….…………… ±5 %.
1.2.9 Power consumption ………………..………..…………………….. not more than 2.0 VA.
1.2.10 Blocks provide generation of self-diagnostics codes and current measurement
information for the external information network based on interface:
- RS-422 (DiBUS data exchange protocol) …………....….….….…….. for BDMN-200DD;
- RS-485 (DiBUS data exchange protocol) …………....….…..….…….. for BDMN-200PD.

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For the description of data exchange registers in the DiBUS protocol see Appendix А.
1.2.11 Operating conditions:
- operating temperature …………………………………..……………… minus 40 to +50 °C;
- relative humidity …………..………………..……………..…………..…… 98 % at +35 C;
- atmospheric pressure ………………………………….……………….… 84.0 to 106.7 kPa;
- content of the corrosive agents in the ambient air corresponds to the values in table 1.1.
Table 1.1
Type of atmosphere
Designation Description Content of the corrosive agents
I Relatively clean
Sulphur dioxide gas not more than 20 mg/(m2·day)
(not more than 0.025 mg/m3);
Chlorides not more than 0.3 mg/(m2·day)
II Industrial
Sulphur dioxide gas not more than 20 to 250 mg/(m2·day)
(not more than 0.025 to 0.31 mg/m3);
Chlorides not more than 0.3 mg/(m2·day)
III Maritime
Sulfur dioxide gas not more than 20 mg/(m2·day)
(not more than 0.025 mg/m3);
Chlorides – 30 to 300 mg/(m2·day).
1.2.12 Limits of complementary error of the AEDR of neutron radiation due to deviation of
temperature from normal value to the limiting values of operation conditions ………….…….. ±10 %.
1.2.13 Detectors withstand sinusoidal vibrations in the frequency range from 10 to 55 Hz with
displacement amplitude 0.35 mm.
1.2.14 Detectors are stable against seismic impacts with magnitude 7 according to the MSK-64
scale, being installed on the building structures of the industrial site at 70 to 30 m relative to the
grade level.
After the seismic impact with the above mentioned parameters detectors are operable within the
limits stated in sections 1.2.3, 1.2.10 during the whole life cycle under specified operation conditions.
1.2.15 Degree of protection provided by casings against ingress of solid items and water - IP65.
1.2.16 Detectors are stable against electromagnetic interference of 2 grade according to the
IEC 1000-4-8-93, IEC 1000-4-9-93, IEC 61000-4-2-95, IEC 61000-4-3:2006, IEC 61000-4-4:2004,
IEC 61000-4-5-95, IEC 61000-4-6-96, IEC 61000-4-12-95 and comply with the emission standards
stated by the CISPR 22:2006 for equipment of class A.
1.2.17 Detectors are stable against short (duration 5 minutes) overloads of the monitored
radiation with AEDR of neutron radiation 1 Sv·h-1. After overload the detectors are operable, basic
relative measurement error remains within limits stated in the 1.2.3.
1.2.18 Detectors are operable after exposure to gamma radiation with AEDR up to 10 Sv·h-1
and 5 minutes duration.
1.2.19 Detectors are stable under conditions of background gamma radiation with AEDR up to
0.01 Sv·h-1.
Limits of complementary measurement error of AEDR under conditions of background gamma
radiation with AEDR up to 0.01 Sv·h-1 relative to the measurement results at AEDR of neutron
radiation of 1.0 mSv·h-1 – not more than ±10 %.
1.2.20 By its protection against electric shock detectors comply with the IEC 61010-1:2001.
1.2.21 Detectors are fire-safe products with fire probability of not more than 10-6 year-1.
1.2.22 Detectors withstand the exposure to decontaminating solutions:
1) boric acid (H3BO3) – 16 g, sodium thiosulfate (Na2S2O3·5H2O) – 10 g, distilled water – up to
1 liter;

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2) trisodium phosphate or sodium hexametaphosphate (any detergent) – 10 - 20 g/l water
solution;
3) 5 % citric acid solution in rectified alcohol – for connectors and contacts.
1.2.23 Overall dimensions of the detector, not more than:
- with handle …………………………………………………..………...... 316×240×290 mm;
- with light-weight attachment fitting ………………………..………….... 254×256×350 mm;
- with wall mounting …………………………...……………………….... 428×258×347 mm.
1.2.24 Weight of the detector without fitting/mounting, not more than ….……………. 11.5 kg.
1.2.25 Length of the connecting cable when used with twisted pair cable of category 5
type FTP-4 ..……………………………………..……………………………… not more than 1200 m.
1.2.26 Mean time before failure …………………...…………..……. not less than 10000 hours.
1.2.27 Mean life time ………………………………………..………..…. not less than 10 years.
1.3 Configuration
1.3.1 Detector consists of spherical neutron moderator with detector module placed inside it.
1.3.2 The following accessories are supplied by customer's request:
- handle – for mobile versions of detectors;
- attachment fitting or wall mounting – for stationary installed detectors;
- cable plug RS10TV – for assembling a cable for connection with PC;
- interface converter PI-02 – for connection to PC;
- software “TETRA_Checker” developed for adjustment, calibration and verification of
detectors.
1.3.3 Cable for connection with PC is not included in the delivery kit, it is assembled by the
customer using the cable plug from the delivery kit in accordance with the wiring diagram
(Appendix B).
1.4 Design and operation
1.4.1 Detector module is comprised of:
- scintillation detector based on LiF, enriched in 6Li isotop to 85 %, and ZnS(Ag), placed in
the plexiglass for conversion of slow/thermal neutrons into scintillations (flashes of light);
- PMT (photomultiplier tube) – for registration of scintillations;
- high voltage converter – for high voltage supply to the PMT;
- amplifier-discriminator – for amplifying and selection by amplitude of pulses from the PMT;
- microcontroller unit – for linearization and normalization of measurement results and data
transfer to the external device.
1.4.2 Neutron moderator is intended for deceleration and thermalization of fast neutrons.
Neutron moderator can be of portable version with handle, alternatively it can be equipped with
a light-weight attachment fitting or a wall mounting.
Outline drawing of the neutron moderator are presented in the Appendix C.
1.4.3 Operating principle of detectors is based on conversion of the ionizing radiation energy
into electric pulses.
By request of an external device, detectors return measured value of AEDR


10
*

 at the time
of request, calculated by the formula
 
MN
1
N
K10
*


 (1.2)
where K – sensitivity coefficient, Sv h-1 s;
N – frequency of pulses, s-1;
M – “dead time”, s.

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Not e – Typical value of sensitivity coefficient is K = 2.0·10-6 Sv·h-1·s and that of “dead time” is M = 23.0 s.
Sensitivity coefficient and “dead time” are written in the nonvolatile memory of the detector at
the time of adjustment. Reading and changing of these parameters, as well as other adjustment and
calibration operations are performed using the “TETRA_Checker” software.
1.4.4 The user can select one of the following algorithms of count rate measurements:
“Sliding” and “Following”.
1.4.4.1 The “Sliding” algorithm is used when the detector constitutes a part of a dosimetric
system.
The “Sliding” algorithm (moving average method) provides continuous measurement of the
count rate and calculation of average count rate in the “sliding window” with the width determined by
parameters “Interval quantity” and “Interval time” in seconds.
Average count rate is calculated by the formula
k
t
N
n
)1k(j
ji
i
j



 (1.3)
where j n – is the average count rate in thj

“sliding window”, s-1;
i
N – is the number of pulses, registered during the thi

time interval;
t
– is the time of interval; t is equal to 5 seconds;
k
– is the interval quantity; t is selected by operator within the range 1 to 60.
The interval time can be changed by operator by means of “TETRA_Checker” software in the
range from 1 second to 65535 seconds.
Generation of the “Alarm” signal begins when the AEDR of neutron radiation exceeds
corresponding threshold set by operator. The “Sliding” algorithm allows smoothing of fluctuations of
the count rate and prevents false alarms, but at the same time the respond to dynamic changes of the
radiation intensity is delayed to some extent. The delay is determined by the algorithm parameters: the
interval time and the interval quantity.
By default the following parameters are set for the “Sliding” algorithm: interval quantity – 2;
interval time – 20 s. The algorithm provides regular updates of readings on the device’s display in
periods equal to interval time in seconds.
1.4.4.2 The “Following” algorithm is used when the detector constitutes a part of a dosimetric
system.
The “Following” algorithm provides cyclic measurement of the number of pulses and
calculation of the average count rate by the formula
i
N
n
j
1i i
i

 (1.4)
where i
n – is the average count rate, s-1;
i
N – is the number of pulses, registered during i-th second of the measurement cycle;
t
– is the measurement cycle duration, from 1 to 200 second.
Restart of the measurement cycle in case of fluctuations of the measured quantity exceeding
three standard deviations

of its current value is performed automatically.
Standard deviation  , where N is the count rate.
This ensures relatively fast response to changes of the radiation intensity and generation of the
“Alarm” signal at the moment when the AEDR of neutron radiation exceeds the threshold set by
operator.

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1.4.5 The measurement result is compared with preset thresholds each second; the following
thresholds are limiting the tunnel of allowable AEDR of neutron radiation:
- “Alarm threshold” – this threshold defines the upper limit of the tunnel;
- “Preliminary threshold” – this threshold sets the warning level;
- “Bottom threshold” – the bottom of the tunnel, signal falling below the bottom line is
usually evidence about the detector failure or decreasing of the controlled process intensity below
allowable limit.
In case when zero value of the threshold is set – it is inactive.
1.4.6 Detectors provide possibility for data transfer and access to the processed information via
communication channels based on interfaces (DiBUS protocol):
- RS-422 (DiBUS data exchange protocol) …………....….….……...….. for BDMN-200DD;
- RS-485 (DiBUS data exchange protocol) …………....….…..……..….. for BDMN-200PD.
For the description of data exchange registers in the DiBUS protocol see Appendix A. Detailed
description of the DiBUS protocol is available on the website of the manufacturer www.doza.ru.
1.4.7 Detectors require external stabilized power supply. Wiring diagram is presented in the
Appendix B.
1.4.8 The inner electronic circuit is galvanically isolated from the detector casing.
1.5 Marking and sealing
1.5.1 Detector casings have a nameplate with the following information:
- trademark and name of the manufacturer (supplier);
- reference designation of the detector;
- works number of detector according to the manufacturer's system of numeration;
- degree of ingress protection against solid items and water provided by casings;
- made in Russia.
1.5.2 Method of marking and place on the detector where it is made shall comply with the
design documentation.
1.5.3 Detectors are sealed in accordance with the design documentation.
1.6 Packing
1.6.1 The detector’s package complies with the design documentation and provides protection
against ingress of atmospheric precipitations and aerosols, splashes of water, dust, sand, solar ultra-
violet radiation and limits the ingress of water vapour and gases.
2 INTENDED USE
2.1 Operational limitations
2.1.1 Detectors retain operability under conditions stated in sect. 1.2.
2.1.2 Detectors can be used with installations equipped with corresponding data exchange
interface and providing power supply with required voltage for detectors.
2.2 Preparation of the product for use
2.2.1 Connect the detector to PC following the wiring diagram (Appendix B) and using, if
necessary, interface converter PI-02 as shown in figures 2.1.

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Figure 2.1 – Connection of detectors
2.2.2 Apply power supply voltage.
2.2.3 Start the “TETRA_Checker” software on the PC as described in the User Manual
(Appendix D) and make sure that detector parameters have being correctly read.
The detector operability can be checked by presence of indication of measurement result in
corresponding window of the “TETRA_Checker” software.
2.3 Use of a product
2.3.1 Detectors do not require any actions of personnel during their operation.
2.3.2 Measurement results are transferred to the external data exchange channel by request of
the external device.
2.4 Adjustment
2.4.1 Before performing adjustment prepare the detector according to 2.2.
2.4.2 Change of sensitivity coefficient К is performed by correcting the “Sensitivity index”
parameter using the “TETRA_Checker” software. Change of this parameter results in proportional
change of the indications within all measurement range.
2.4.3 Correction of indications in the end of the range (more than 0,4 of the upper limit of
measurement range) is performed by adjusting the “dead time” using the “Tetra_Checker” software.
Increasing “dead time” results in increasing indications at high count rates only.
3 MAINTENANCE
3.1 General notes
Maintenance is performed with the purpose of ensuring reliable, long-term operation of
detectors.
3.2 Safety precautions
3.2.1 Before beginning to work with detectors familiarize yourself with this User Manual.
3.2.2 During all operations with detectors follow occupational and radiation safety
requirements of current safety instructions in the company (enterprise).
3.2.3 All cable connections and disconnections should be performed with the power supply cut
off. When using detectors as part of measurement information complexes, systems and installations
“hot” connection of cables is allowed (without switching detectors off). In this case the protective earth
should be connected to corresponding terminals of the detector and of the device receiving signals
from detector.
BDMN-200DD/
BDMN-200PD
PC
~220 V, 50 Hz
Converter PI-02
RS-485/RS-422

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3.3 Maintenance routine
3.3.1 Maintenance is divided into routine and periodic.
3.3.1 Routine maintenance
3.3.1.1 Routine maintenance is carried out during regular operation; it includes inspections of
detectors for timely detection and elimination of factors which can compromise their operability and
safety.
3.3.1.2 The following main types and periodicity of routine maintenance are recommended:
- visual inspection ……………………………………………….………..…….. every month;
- cleaning of external surfaces (decontamination) .…………...……………...…… every year.
3.3.1.3 During visual inspection conditions of cables and connectors and reliability of securing
are assessed.
3.3.1.4 Decontamination of detectors is performed in accordance with work schedule at the
company (facility):
- external surfaces of detectors are decontaminated using solutions 1) and 2) of the 1.2.22:
after cleaning surfaces using cloth moisten with decontaminating solution it is necessary to wipe
surfaces using cloth moisten with distilled water and then dry using filter paper;
- cable connectors are decontaminated using solutions 3) of the 1.2.22: additional treatment
with distilled water and drying with filter paper are not required.
Dry cleaning can be performed with any periodicity.
Detectors should be disconnected from the power supply before dry cleaning and/or
decontamination.
3.3.2 Periodic maintenance
Periodic maintenance consists of calibration of detectors.
4 CALIBRATION ROUTINE
4.1 General requirements
Calibration of detectors are performed in accordance with the IEC 61453:2007.
4.2 Preliminary arrangements
Operations performed during calibration and necessary equipment are listed in the table 4.1.
Table 4.1 – List of calibration operations
Operation Calibration tools and equipment and their technical
characteristics
1 External examination 4.5.1 Visual
2 Testing 4.5.2
Calibration installation UCPN-2M-D (complies with
TU 4362-052-31867313-2005).
Range of reproduced AEDR of neutron radiation –
from 20 to 800 Sv·h-1, error ±15 %
PC with technical means for using corresponding port,
with installed “TETRA_Checker” software
3 Determination of basic relative
measurement error of AEDR of
neutron radiation
4.5.3
Power supply with voltage 12÷ 24 V
Not e - It is allowed to use other tools and equipment with similar characteristics ensuring determination of
metrological characteristics of detectors with required precision.

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4.3 Safety precautions
It is necessary to follow safety requirements described in section 3.2 and in documentation
accompanying calibration tools and equipment.
4.4 Conditions
4.4.1 The following normal operating conditions shall be met during calibration:
- air temperature ……………………………………….…….…………………. +(20 ±5) °C;
- relative air humidity ……….……………………….….....……..……...… from 30 to 80 %;
- atmospheric pressure ………………………………………………….… 86.0 to 106.7 kPa.
4.4.2 The detector before calibration should be placed in conditions as per section 4.4.1 and
kept under these conditions for 4 hours.
4.5 Procedure
4.5.1 External examination
The items to be checked during external examination:
- proper completeness;
- absence of defects which could affect the detectors operation;
- availability of operational documentation.
4.5.2 Testing
Perform the following operations to test the detector:
- connect detector to PC consulting with fig. 2.1;
- apply power supply voltage;
- Start the “TETRA_Checker” software on the PC and make sure that detector parameters
have being correctly read;
- click on the program’s panel on the “PARAMETERS” button and select request via
broadcast address.
The detector operability can be checked by presence of indication of a measurement result in
corresponding window of the “TETRA_Checker” software.
4.5.3 Determination of basic relative measurement error of AEDR of neutron radiation
4.5.3.1 Determine the basic relative measurement error by means of successive exposure of the
detector to a set of AEDR of neutron radiation in the ranges: the first value is selected within the range
10 to 100 Sv·h-1; the second - 300 to 700 Sv·h-1.
4.5.3.2 For taking measurements detector should be placed in the radiation field of the
calibration installation so that the axis of the collimated beam be perpendicular to the longitudinal axis
of detector and pass through the center of the neutron moderator.
4.5.3.3 Determine measurement results at the first and the second AEDR points as the average
of five readings taken with interval of 100 seconds for each point.
4.5.3.4 Calculate the relative error

of AEDR of neutron radiation in per cent using the
following formula
100
H
HH
*
0
*
0
*


 

(4.1)
where *
0
Н
 - is the AEDR value reproduced by the calibration installation, Sv·h-1;
*
Н
 - AEDR value as measured by the detector, Sv·h-1;
The detector is considered valid if the main relative error of measurement at both points does
not exceed the value stated in the 1.2.3.

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If the relative error exceeds limit, perform correction of sensitivity coefficient and “dead time”
in accordance with the section 2.4. It is recommended to perform correction of sensitivity coefficient
using the range 10 to 100 Sv·h-1, the “dead time” is fixed at 23 s and is not changed during
calibration.
5 ROUTINE REPAIRS
5.1 Routine repairs include restoration of damaged cables and connectors.
6 STORAGE
6.1 Prior to putting into operation detectors shall be stored in a heated warehouse with natural
ventilation:
- in manufacturer’s package – at ambient temperatures from +5 to +40 C and relative
humidity up to 80 % at +25C;
- unpacked – at ambient temperatures from +10 to +35 C and relative humidity up to 80 %
at +25 C.
6.2 The storage location should be free of dust, chemical vapours, aggressive gases and other
substances that may cause corrosion.
The storage location shall exclude exposure of the detectors to the direct rays of sunlight.
7 TRANSPORTATION
7.1 Detectors in the original manufacturer’s package can be transported by all means of
transport at any distance:
- transportation by railway shall be carried out in clean boxcars;
- when transported by air the boxes with detectors shall be placed in air-tight heated
compartment;
- when transported by water and sea transport the boxes with detectors shall be placed in the
hold.
7.2 Arrangement and fastening of the boxes on transport means shall provide their steady
position en route, absence of displacement and striking each other.
7.3 The requirements of the inscriptions on the transport packing shall be observed during
loading and unloading.
7.4 Transportation conditions are as follows:
- temperature …………………………………………………..….. from minus 25 to +50 °C;
- humidity …………………………………….………………....…..… up to 98 % at +35 °C;
- sinusoidal vibrations ………………………….. within frequency range from 10 to 55 Hz
with displacement amplitude 0.35 mm.
8 DISPOSAL
8.1 On full expiry of the detector (its component parts) service life as well as prior to its
dispatching for repair or calibration it shall be inspected for possible radioactive contamination of its
surfaces. Criteria for decision making on decontamination and further use shall comply with obligatory
requirements of national standards.

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8.2 Decontamination shall be attempted in cases when the detector surfaces contamination
(including surfaces accessible during repair) can be reduced below allowable limits.
In case the radioactive contamination exceeds allowable limits, requirements set forth for the
radioactive wastes become applicable to the detectors.
8.3 Detectors accepted for operation after decontamination are subjects for repair or
replacement in case of failure. Detectors not suitable for operation, with radioactive contamination
levels below permissible limits, should be dismantled to prevent further use and transferred to a special
site for disposal of industrial wastes.
8.4 Detectors with expired lifetime, accepted for use after decontamination, shall undergo
technical inspection. If the technical condition of a detector is satisfactory, an extended operation term
of the product shall be determined.

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Appendix A
(Reference)
DESCRIPTION OF DATA EXCHANGE REGISTERS IN THE DiBUS PROTOCOL
А.1 Data for reading from and writing to the detectors
Data for reading from and writing to the detectors are interrogated in accordance with indices
indicated in the table A.1.
Table A.1 – Data for reading from and writing to the detectors
Index Description R/W Type
Name (number)
General purpose registers
0×09 Combined package:
“Instantaneous value”
R/- BYTE(1)
0×0c Date and time of correction of the detector parameters R/- Long_DateTime(31)
0×0d Date and time of assembling of the detector R/- Long_DateTime(31)
0×0f Combined package: value of selected measured
quantity and detector status
R/- BYTE(1)
0×10 Measurement result of selected measured quantity R/- Single (25)
0×13 Measurement interval of selected measured quantity R/- DWORD (11)
0×14 Uncertainty of the measurement result R/- BYTE(1)
0×15 Selection of the measured quantity 1) R/W BYTE(1)
0×18 Status of the detector R/- WORD (5)
0×19 Restart of measurement -/W BYTE(1)
0×1c Detector code 2) R/- BYTE(1)
0×1d Setting the net address of the block -/W DiBUS_address (33)
0×1e The detector’s software version R/- UNICODE(29)
Measured quantity
Measured quantity No. 1
0×22 - AEDR, Sv/h R/- Single (25)
0×23 - Interval for AEDR measurement, s R/- DWORD (11)
0×24 - Uncertainty of the AEDR, % R/- BYTE(1)
Measured quantity No. №2
0×27 - Dose, Sv R/- Single (25)
0×28 - Interval for dose measurement, s R/- DWORD (11)
0×29 - Uncertainty of the dose, % R/- BYTE(1)
Measured quantity No. 3
0×2c - Average count rate, counts per second (cps) R/- Single (25)
0×2d - Interval for measurement of average count rate, s R/- DWORD (11)
0×2e - Uncertainty of the average count rate, % R/- BYTE(1)

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Index Description R/W Type
Name (number)
Dynamic parameters
0×71 Alarm threshold 3) R/W Single (25)
0×73 Preliminary threshold R/W Single (25)
0×75 Bottom threshold R/W Single (25)
0×77 Algorithm (0 – “Following”; 1 – “Sliding”) R/W Single (25)
0×79 Interval quantity (Sliding) 1 - 60 R/W Single (25)
0×7b Interval time (Sliding) 1 – 65535 s R/W Single (25)
0×7d Sensitivity coefficient, (Sv/h)/cps R/W Single (25)
0×7f Dead time, s R/W Single (25)
0×81 DB accumulated dose, Sv R/W Single (25)
0×83 Hours worked, h R/W Single (25)
0×85 Self background, Sv·h-1 R/W Single (25)
1) Allowable values of the register “Selection of measured quantity” for this detector are 1, 2 and 3.
2) Preset by the manufacturer. Code of this device is 17.
3) Dimension of threshold corresponds to the dimension of measured quantity selected as default.
А.2 Selection of the measured quantity
Register 0×15 allows selection of the default measured quantity. The measured quantity set as
“default” is used by registers:
- “Instantaneous value” – 0×09;
- “Combined package: Measurement result of the selected measured quantity” – 0×0f;
- “Measurement result of the selected measured quantity” – 0×10;
- “Measurement interval of the selected measured quantity” – 0×13;
- “Uncertainty of the measurement result” – 0×14.
А.3 Restart of measurement
Register 0×19 is used for restart of measurement of N-th measured quantity. The list of values
written to this register is presented in the table A.2.
Table A.2 – List of values that can be written to the 0×19 register
Written value Description
0×00 Restart of measurement of selected measured quantity
Value 1, 2, 3 Restart of measurement of corresponding measured quantity
0×ff Restart of all measurements
А.4 Status register (index 0×18)
Status register (index 0×18) is used for determination of the detector status.
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
The value 0×0000 corresponds to normal state of the detector. Flags of the status register 0×18
is presented in the table A.3.

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Table А.3 - Description of flags of the status register 0×18
Flag Purpose
B0 1 – Short circuit
B1 1 – Detector is out of order
B2 Reserved
B3 Reserved
B4 1 – Malfunction of the nonvolatile memory
B5 1 – “Alarm threshold” exceeded
B6 1 – “Preliminary threshold” exceeded
B7 1 – Signal is below the “Bottom threshold”
B8 1 – The upper limit of the measurement range is exceeded
B9 1 – Detector is not ready
B10 1 – Parameters were changed
B11-B15 Reserved
A.5 Register “Instantaneous Value” of the selected measured quantity
Data block of the package consists of combination of bytes. The block structuire:
Idx InsMV InsPSS UniqSec
Designation
Idx – index of register = 0×09, 1 byte, data type BYTE(1);
InsMV – measurement result of selected measured quantity, 4 bytes, data type Single (25)
(see description of the register “Selection of the measured quantity” in the table A.1), calculated using
data for the UniqSec-th second;
InsPSS – number of pulses acquired during UniqSec-th second, 4 bytes, data type Single (25);
UniqSec – unique identifier (changes every second), 4 bytes, data type DWORD (11).
Examples of packages are presented in the Table A.4.
Table A.4 – Examples of packages
Note Package
Request for measurement result of the selected
measured quantity
Header: A 010101 06 19 0100 C
Data: 10 C
Inquiry answer Header: 010101 A 07 19 0500 C
Data: 10 XXXX C
Request for measurement interval of the selected
measured quantity
Header: A 010101 06 0B 0100 C
Data: 13 C
Inquiry answer Header: 010101 A 07 0B 0500 C
Data: 13 XXXX C
Request for measurement uncertainty of the
selected measured quantity
Header: A 010101 06 01 0100 C
Data: 14 C
Inquiry answer Header: 010101 A 07 01 0200 C
Data: 14 X C
Note - A are three bytes of the block address, X – bytes of the transferred values, C - are four bytes of
the check sum.

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Appendix B
(Reference)
WIRING DIAGRAM
Item
designation Description Q-ty Note
A1 Divider AJAH.418289.007 1
BL1 Photomultiplier tube FEU-35-1 1
A2 Amplifier AJAH.418288.007-04 1
A3 Voltage multiplier AJAH.418289.005 1
A4 Regulator AJAH.418283.012 1
BD1 Detector ZnS 1 30x4 mm
HL1 LED L-34HD “Kingbright” 1
XP3 Plug RS10TV 1
XS1 Socket EHR-3 “JST” 1
XS2 Socket EHR-2 “JST” 1

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Appendix C
(оbligatory)
OUTLINE DRAWING
Figure С.1 – Portable version of the detector (with handle)
Figure С.2 – Detector with light-weight attachment fitting
Detector
module
FVKM
.
305615.001
4 holes
Ø6,5

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Figure С.3 – Detector with wall mounting
Wall mounting
Neutron
Moderator
4 holes
Detector
module

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Appendix D
(Obligatory)
SOFTWARE “TETRA_Checker”
USER MANUAL
Content
D.1 Purpose of the software …………………………….…….……... 19
D.2 Description of the interface …………………...………….……... 19
D.2.1 Overview of the main window ………………...…………. 19
D.2.1.1 “Parameters” button …………………………….……… 20
D.2.1.2 Information panel……………………………….…….… 21
D.2.1.3 “Measuring data” panel ………………………..………. 21
D.2.1.4 “Device status” panel …………………..………………. 21
D.2.1.5 “Device parameters” panel …………..…………………. 22
D.1 PURPOSE OF THE SOFTWARE
The “TETRA_Checker” software (hereinafter – “program”) is intended for adjusting and
calibration of devices and detectors (hereinafter – “device”).
The program allows doing the following:
- read and indicate values of the device parameters;
- write the net address into the device;
- write values of the dynamic parameters into the device; nomenclature of parameters is
defined by the device itself;
- select one of the measured quantities in the device as a quantity requested by default;
- indicate information about the operation of the device and measurement results on the
monitor of personal computer;
- indicate the device status information on the monitor of personal computer.
ATTENTION! BUGS ARE POSSIBLE WHEN USING THE PROGRAM
SIMULTANEOUSLY WITH NET CLIENTS (ICQ clients, Skype, GTalk, Jabber etc.). IF THIS IS
THE CASE IT IS RECOMMENDED TO CLOSE ALL ABOVE MENTIONED CLIENTS
(SOFTWARE) AND RESTART THE PROGRAM.
D.2 DESCRIPTION OF THE INTERFACE
D.2.1 Overview of the main window
The overview of the program’s main window is shown on the figure D.2.1. In the main window
the following interface elements are located:
- “Parameters” button;
- Information panel;
- “Measuring data” panel;
- “Device status” panel;
- “Device parameters” panel.

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Figure D.2.1 - Overview of the main window
D.2.1.1 “Parameters” button
The “Parameters” button is located in the upper right corner of the main program window.
Pressing the button “Parameters” displays a window shown in figure D.2.2.
Figure D.2.2 – Overview of the window “Parameters”