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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

Dosimeter DKG-07D «Drozd» FVKM.412113.026 (hereinafter - dosimeter) is intended for

measurement of:

ambient equivalent dose rate

ambient equivalent dose

The dosimeter can be used at nuclear plants and facilities, at radiochemistry plants, in industries

where radiation sources are used, at special and custom control stations, and by ecological services and

sanitary inspections. The dosimeter can also be used by persons from population for individual

monitoring of radiation environment.

1.2 Technical characteristics

1.2.1 Energy range of measured gamma radiation ..................................... 0.05 to 3.0 MeV.

1.2.2 Measurement range:

AEDR of gamma radiation ................................................... 1·10

AED of gamma radiation .............................................................. 1 to 2·10

1.2.3 Limits of the permissible basic relative measurement error of AEDR and AED of

gamma radiation ................................................................................. (15+2.5/   ) %;

where H is a dimensionless unit, numerically equal to measured values of measured AEDR or AED in

-1

μSv·h

and μSv, accordingly.

1.2.4 Energy dependence relative to

1.2.5 Anisotropy of dosimeter ..................................................................... 30 %:

for energies 0.662 and 1.25 MeV and with incidence angle changing from 0° to ±180°

relative to the direction used during dosimeter calibration, in vertical and horizontal planes; except the

angle 90° in horizontal plane, for which the anisotropy of sensitivity is ......not more than minus 45 %;

for energies 0,06 MeV with angle changing from 0° to ±45° relative to the direction used

during dosimeter calibration, in vertical and horizontal planes.

1.2.6 Warm-up time of the dosimeter ................................................. not more than 5 s.

1.2.7 Continuous operation with one set of batteries ........................................ 200 hours.

1.2.8 Instability of readings during 8 hours of continuous operation relative to average value of

readings for this period of time .............................................................................. ±3 %.

1.2.9 Interval of measurement of AEDR ..................................................... not limited.

Not e – In the mode of AEDR measurement the precision of readings is continuously improved in the course

measurement. Simultaneously the decreasing value of statistical uncertainty is shown on the LCD that allows to regard the

measurement result as final one when the desired precision is reached.

1.2.10 Power supply voltage ................................................................. 2.0 to 3.2 V.

1.2.11 Power supply of the dosimeter is carried out from two batteries of AA type, 1.5 V each,

with total voltage not more than 3.2 V.

1.2.12 Operating conditions:

operating temperature range ..................................................... minus 20 to + 50 C;

maximum limit of relative humidity ................................................. 90 % at +25 C;

atmospheric pressure .............................................................. 84.0 to 106.7 kPa.



 

of gamma radiation (hereinafter - AEDR);

 

of gamma radiation (hereinafter - AED).

137

Cs (0.662 MeV) ...................................... 25 %.

FVKM.412113.026RE

-1

to 3·10

μSv·h

;

μSv.