ECOTEST DKG-21 M User manual

DKG-21 M
PERSONAL GAMMA RADIATION DOSIMETER
Operating manual
ВІСТ.412118.023-02 РЭ

2
CONTENTS
1 GENERAL GUIDELINES..................................................5
2 MAIN INFORMATION ABOUT THE DOSIMETER.......7
3 DESCRIPTION AND OPERATION ..................................9
4 PROPER USE OF THE DOSIMETER .............................43
5 TECHNICAL MAINTENANCE.......................................83
6 STORAGE.......................................................................112
7 SHIPPING.......................................................................113
8 DISPOSAL......................................................................116
9 WARRANTY ...................................................................117
10 PACKING CERTIFICATE ...........................................119
11 CERTIFICATE OF ACCEPTANCE.............................120

3
12 PERFORMANCE RECORDS OF THE DOSIMETER 121
13 CLAIMS ....................................................................... 122
14 ACCEPTANCE AND WARRANTY............................... 124
APPENDIX А .................................................................... 126
APPENDIX B.................................................................... 128
APPENDIX C.................................................................... 129
APPENDIX D.................................................................... 130
APPENDIX E .................................................................... 131
APPENDIX F..................................................................... 132
APPENDIX G.................................................................... 136
APPENDIX H.................................................................... 138
LIST OF ABBREVIAITONS ............................................ 139

4
This operating manual of ВІСТ.412118.023-02 РЭ
type is intended to inform the user about the principles of
operation and rules of application of DKG-21 M personal
gamma radiation dosimeter. The manual contains all
information necessary for proper use of the DKG-21 M
dosimeter (hereinafter called the dosimeter) and full
realization of its technical possibilities.
Before operating the dosimeter, the user should be
instructed on safety engineering and radiation safety,
and should study this operating manual.

5
1 GENERAL GUIDELINES
1.1 Carefully study the operating manual
(hereinafter referred to as the OM) before using the
dosimeter.
1.2 The OM should always be kept with the
dosimeter.
1.3 All records in the OM should be accurate and
clear. Notes made in pencil, erasures and uncertified
corrections are not allowed.

6
1.4 When the dosimeter is handed over to another
company, summary records on operation shall be
certified with the seal of the company, which transfers
the dosimeter.

7
2 MAIN INFORMATION ABOUT THE
DOSIMETER
The dosimeter meets the ТУ У 33.2-22362867-
010:2007 technical requirements.
The dosimeter is intended to be used as a stand-
alone device or as part of the automated system of
personal dosimetry control ASPDC-21 (hereinafter –the
ASPDC) registered in the State Register for Measuring

8
Instruments, and is accepted for application in
Ukraine under No. У1816-07.
The dosimeter contains no precious materials.
Manufacturer:
Private Enterprise “SPPE “Sparing-Vist Center”
33 Volodymyr Velyky Str., Lviv 79026, Ukraine.
tel.: [phone]; fax: [phone].
E-mail: sa[email protected].

9
3 DESCRIPTION AND OPERATION
3.1 Purpose of use
3.1.1 The dosimeter is designed to measure
individual dose equivalent
)10(
p
H
of gamma and X-
ray radiation (hereinafter –DE) and individual dose
equivalent rate
)10(
p
H

(hereinafter –DER) of gamma
and X-ray radiation, as well as support the automated
database of radiation burden to the personnel in the
ASPDC.

10
3.1.2 The dosimeter can be used at industrial
enterprises and companies that deal with gamma
sources.
3.2 Technical specifications
3.2.1 DER measurement range varies from
0.1 µSv/h to 1.0 Sv/h.
3.2.2 DER indication range of varies from
0.01 µSv/h to 1.0 µSv/h.

11
3.2.3 Main relative permissible error limit of DER
measurement with 0.95 confidence probability is:
- ±20 % - in the DER range of 1.0 to 10 μSv/h;
- ±15 % - in the DER range of 10 μSv/h to 1.0 Sv/h.
3.2.4 DE measurement range varies from 0.001 to
9999 mSv.
3.2.5 Main relative permissible error limit of DE
measurement with 0.95 confidence probability is
±15 %.

12
3.2.6 Complementary relative permissible error limit
of DER and DE measurements caused by ambient
temperature change from -20 to + 50 0С is ±5 % per
each 10 0С of deviation from + 20 0С.
3.2.7 Energy range of registered gamma and X-ray
radiation is from0.05 to 6.00 MeV.
3.2.8 Energy dependence of DER and DE
measurements in the energy range of 0.05 to 1.25 MeV
relative to 0.662 MeV energy is not more than ± 25 %.

13
3.2.9 Anisotropy at gamma quantum incidence at
solid angle of ± 600relative to the main measurement
direction (perpendicular to the back panel of the
dosimeter that is marked with the “+” symbol), not more
than:
- ±25 % - for 137Cs and 60Co radionuclides;
- ±85 % - for 241Am radionuclide.
3.2.10 Time of operating mode setting at DER
measurement, not more than:
- from 1∙10-6 Sv/h to 5∙10-6 Sv/h (inclusive),
maximum 30 minutes;

14
- from 5∙10-6 Sv/h to 2∙10-5 Sv/h (inclusive), maximum 5
minutes;
- from 2∙10-5 Sv/h to 1.0 Sv/h, maximum 3 min.
3.2.11 Time of continuous operation of the
dosimeter, which is charged from a new battery under
normal radiation background, is at least 4000 hours.
3.2.12 Unstable readings during an 8-hour
continuous operation is not more than ± 5 %.
3.2.13 The dosimeter is powered from DC source of
2.4 to 3.2 V voltage and capacity of 560 mAh.

15
Note –Nominal supply voltage –3 V.
3.2.14 Current consumption of the dosimeter at
nominal voltage under normal radiation background is
not more than 0.4 mA.
3.2.15 Complementary relative permissible error
limit of measurements caused by supply voltage
deviation from the nominal voltage value, ranging from
3.2 to 2.4 V, is not more than ±10 %.
3.2.16 Dimensions of the dosimeter is not more than
98×58×18 mm (without a clip).

16
3.2.17 Weight is not more than 0.14 kg.
3.2.18 The dosimeter is resistant to the external
impacts:
- temperature –from - 20 to + 50 0С;
- relative humidity –up to (95±3)% at + 35 0С
temperature;
- atmospheric pressure –from 84 to 106.7 kPa.
3.2.19 Regarding the resistance and strength against
external impacts, the dosimeter meets the requirements
of group 1.14 of boreal climatic version according to

17
GOST В20.39.304-76 with restrictions to low operating
and ultimate temperature.
3.2.20 The dosimeter is resistant to the influence of
atmospheric precipitation (rain).
3.2.21 The dosimeter is resistant to the influence of
condensed atmospheric precipitation.
3.2.22 The dosimeter has “Clock” and “Alarm
clock” operating modes.
3.2.23 The alarm clock rings during one minute.
3.2.24 DER and DE threshold level values with

18
discreteness of a unit of a programmable digit over the
whole operating measurement range can be
programmed in the dosimeter from the personal
computer (hereinafter –the PC) and in manual mode
with the help of control buttons.
3.2.25 The dosimeter sends audio and light signals if
the preset DER or DE threshold levels are exceeded.
3.2.26 DER and DE values as well as DER or DE
threshold level values alternately appear on the digital
liquid crystal display (hereinafter –the LCD), indicating
the correspondence of information.

19
3.2.27 The history record of dose accumulation
during the preset time interval is contained in the
nonvolatile memory of the dosimeter with the
discreteness of the record change of 1 min in the range
of 5 to 255 min with reference to real time.
3.2.28 The dosimeter supports transmitting the
history record of dose accumulation to the PC via the
infrared port.
The distance of positive exchange between the
dosimeter and the infrared port adapter (hereinafter –
the IRPA) is in the range from 0.1 to 0.3 m.