ECOTEST MKS-05 TERRA User manual

MKS-05 “TERRA”
DOSIMETER-RADIOMETER
OPERATING MANUAL
ВІСТ.412129.006-04 НЕ

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CONTENTS
1 DESCRIPTION AND OPERATION OF THE DOSIMETER..........................................4
1.1 Purpose of use.......................................................................................................4
1.2 Technical specifications.........................................................................................5
1.3 Delivery kit.........................................................................................................14
1.4 Design and theory of operation ............................................................................15
1.5 Labeling and sealing............................................................................................18
1.6 Packing...............................................................................................................18
2 PROPER USE OF THE DOSIMETER.........................................................................19
2.1 Operating limitations...........................................................................................19
2.2 Preparation of the dosimeter for operation............................................................20
2.3 Use of the dosimeter............................................................................................25
3 TECHNICAL MAINTЕNANCE..................................................................................38
3.1 Technical maintenance of the dosimeter...............................................................38
3.2 Verification of the dosimeter................................................................................43

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4 CERTIFICATE OF ACCEPTANCE ............................................................................56
5 PACKING CERTIFICATE..........................................................................................57
6 WARRANTY..............................................................................................................58
7 REPAIR ......................................................................................................................59
8 STORAGE ..................................................................................................................61
9 SHIPPING...................................................................................................................62
10 DISPOSAL................................................................................................................63
APPENDIX A ...............................................................................................................64
APPENDIX B ...............................................................................................................66

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This operating manual (hereinafter called the OM) is intended to inform the user about
the theory of operation and rules of application of the MKS-05 “TERRA” dosimeter-
radiometer. The manual contains all information necessary for proper use of the dosimeter and
full realization of its technical possibilities.
The manual contains the following abbreviations and symbols:
DE - ambient dose equivalent;
DER - ambient dose equivalent rate;
MODE - on/off button and switch between the corresponding modes of
measurement and indication (gamma radiation DER, gamma radiation DE,
surface beta-particles flux density, DE accumulation time, and real time);
THRESHOLD - button of threshold level programming, time indication correction and
backlight switching-on.

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1 DESCRIPTION AND OPERATION OF THE DOSIMETER
1.1 Purpose of use
The MKS-05 “TERRA” dosimeter-radiometer (hereinafter called the dosimeter) is
designed to measure ambient dose equivalent (DE) and ambient dose equivalent rate (DER) of
gamma and X-ray radiation (hereinafter called photon-ionizing radiation), and surface beta-
particles flux density.
The dosimeter is used for dosimetry and radiometry control at industrial enterprises;
ecology research; apartment, building, and construction control; ground surface of infields and
vehicles control; personal radiation safety; visual aids for educational establishments.

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1.2 Technical specifications
1.2.1 Key specifications are presented in Table 1.1.
Table 1.1 – Key specifications
Name Unit of
measurement
Standardized values according to the
technical specifications
1 2 3
Measurement range of photon-ionizing
radiation DER μSv/h 0.1 - 9999
Main relative permissible error limit of
photon-ionizing radiation DER
measurement with confidence
probability of 0.95
% )10(
2
15  
H

,
where )(H 10

 is a numeric value
of the measured DER in μSv/h

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Table 1.1 (continued)
1 2 3
Measurement range of photon-ionizing radiation DE mSv 0.001 - 9999
Main relative permissible error limit of photon-
ionizing radiation DE measurement with 0.95
confidence probability
% ± 15
Energy range of registered photon-ionizing radiation MeV 0.05 – 3.00
Energy dependence of the dosimeter readings at
photon-ionizing radiation DER and DE measurement
in the energy range of 0.05 MeV to 1.25 MeV
% ± 25

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Table 1.1 (continued)
1 2 3
Anisotropy of the dosimeter at gamma
quantum incidence at solid angle of 30o to
150o relative to the main axis of the detector
and from the side of the main measurement
direction for:
- 137Cs and 60Co isotopes
- 241Am isotopes
Note. Anisotropy charts are given in
Appendix A
%
± 25
± 60

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Table 1.1 (continued)
1 2 3
Measurement range of surface beta-
particles flux density part./(cm2·min) 10 - 105
Main relative permissible error limit of
beta-particles flux density measurement
with 0.95 confidence probability %


200
20 ,
β
φis a numeric value of the
measured surface flux density
in part./(cm2·min)
Energy range of registered beta-
particles MeV 0.5 – 3.0

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Table 1.1 (continued)
1 2 3
Measurement range of DE accumulation time with measurement
resolution of 1 min h 100
Absolute permissible error limit at operator’s DE accumulation
time measurement during 24 hrs min ± 1
Time of the dosimeter operating mode setting, not more than min 1
Battery life (AAAx2 of 1280 mA·h capacity) under natural
background radiation and switched off display backlight, not more
than h 2000

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Table 1.1 (continued)
1 2 3
General operating supply voltage of the dosimeter from two
batteries V 3.0
Useful current of the dosimeter at operating supply voltage of
3.0 V under natural background radiation and switched off display
backlight, not more than
mA 0.5
Additional permissible error limit at measurement caused by supply
voltage deviation from nominal value in the range of 3.2 to 2.4 V
for all measured physical values
% ± 10
Additional permissible error limit at measurement caused by
ambient air temperature changes from - 20 to + 50 oC, per each
10 oC deviation from 20 oC for all measured physical values
% ± 5

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Table 1.1 (continued)
1 2 3
Mean time to failure, not less than h 6000
Average life of the dosimeter to the first major overhaul, not
less than h 10000
Average service life of the dosimeter, not less than year 6
Average shelf life of the dosimeter, not less than year 6
Dimensions, not more than mm 52x26x120
Weight, not more than kg 0.15
1.2.2 Threshold level values of photon-ionizing radiation DER in the range of 0 to
9999 µSv/h with discreteness of 0.01 µSv/h are programmed in the dosimeter.
1.2.3 Threshold level values of photon-ionizing radiation DE in the range of 0 to
9999 mSv with discreteness of 0.001 mSv are programmed in the dosimeter.

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1.2.4 Threshold level values of surface beta-particles flux density in the range of 0 to
9999·103 part./(cm2·min) with discreteness of 0.01103 part./(cm2·min) are programmed in the
dosimeter.
1.2.5 The dosimeter sends a one-tone audio signal if gamma quantum or beta-particle gets
to the detector, and a two-tone audio signal if the programmed DER, DE or surface beta-
particles flux density threshold levels have been exceeded.
1.2.6 Low battery status is indicated by the dosimeter.
1.2.7 DER, DE and surface beta-particles flux density values as well as DER, DE and
surface beta-particles flux density threshold level values appear on the digital LCD indicating
the correspondence of information. The values of DER and DER threshold level are expressed
in µSv/h, the values of surface beta-particles flux density and surface beta-particles flux
density threshold level are expressed in 103 part./(cm2·min), and the values of DE and DE
threshold level are expressed in mSv.
1.2.8 The dosimeter performs measurements under the following conditions:

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- temperature from - 20 to + 50 oC;
- relative humidity up to (95±3) % at + 35 oC;
- atmospheric pressure from 84 to 106.7 kPa.
1.2.9 The dosimeter is resistant to the following external factors:
- high frequency sinusoidal vibration in the range of 10 - 55 Hz;
- shocks with a shock pulse duration of 5 ms, total number of shocks 1000±10 and
maximum acceleration of 100 m/s2;
- shocks in shipping container with an acceleration of 98 m/s2, with a shock pulse duration
of 16 ms (number of shocks - 1000±10 in each direction);
- exposure to ambient air temperature from - 25 to + 55 oC and relative humidity up to
(95±3) % at + 35 oC;
- photon-ionizing radiation with exposure dose rate corresponding to ambient DER up to
1.0 Sv/h during 5 minutes.

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1.3 Delivery kit
1.3.1 The delivery kit consists of the dosimeter and the maintenance documentation
presented in Table 1.2.
Table 1.2 - Delivery kit of the dosimeter
TYPE Item Quantity
Notes
BICT.412129.008 MKS-05 “TERRA”
dosimeter-radiometer 1 pc.
BICT.412129.006-04 HE Operating manual 1 pc.
BICT.412915.001 Package 1 pc.
ENERGIZER
Battery of AAA
1.5 V type 2 pcs
Other AAA batteries of 1.5 V
voltage are permissible.
Supplied at customer’s request
Leather case 1 pc.

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1.4 Design and theory of operation
1.4.1 General information
The dosimeter is a mono-block construction with a built-in detector of gamma and beta
radiation, a printed-circuit board equipped with a circuit of the anode voltage formation, digital
processing, control, and indication, and batteries.
Gamma and beta radiation detector transforms radiation into the sequence of voltage
pulses; the number of pulses is proportional to the registered radiation intensity.
The circuit of the anode voltage formation, digital processing, control and indication provides:
- scaling and linear realization of the detector counting response;
- measurement of photon-ionizing radiation DER and surface beta-particles flux density by
means of measurement of an average pulse frequency from the detector outlet;
- measurement of photon-ionizing radiation DE by means of measurement of a general
number of pulses from the detector outlet;

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- measurement of DE accumulation time and real time;
- generation and stabilization of the detector’s anode voltage;
- operating modes control;
- measurement results indication.
The power for operation is supplied by two batteries of AAA type.
1.4.2 Design description
The dosimeter is designed as a flat square plastic body with rounded corners.
The housing (Figure B.1, B.2) consists of the upper (1) and lower (2) covers. The LCD (3)
is located in the middle of the upper cover (1); two keys (4) of control are located to the left
and to the right above the LCD, and a loudspeaker (5) in the upper part of the cover (1).
The battery compartment and the window (7) for surface beta-particles flux density
measurement are located in the lower cover (2). The battery compartment (6) and the window
(7) have covers (8) and (9) correspondingly, fastened due to the elastic capacities of the
materials.

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The circuit board (10) is located inside the unit, where all elements of the electric circuit,
with an exception of a loudspeaker, are located (5). The loudspeaker is fixed to the upper cover
(1) and electrically connected with the circuit board (10) by spring contacts. The latter (10) is
screwed to the upper cover (1) of the housing.
The lower and the upper covers are connected with the help of a special coupling of the
constructs and two screws. The screws are also used to fasten the contacts (11) for battery
insertion.
Control and indication keys of the dosimeter contain the corresponding inscriptions. The
information table is drawn on the lower cover (2) of the unit. The polarity signs are indicated
at the bottom of the battery compartment for proper insertion of batteries.

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1.5 Labeling and sealing
1.5.1 The upper cover of the dosimeter is inscribed with the name, the symbol of the
device, the trademark of the producer, the ingress protection rating of the dosimeter, and the
approval pattern of measuring instruments.
A factory number and a manufacture date are inscribed on the lower cover.
1.5.2 Sealing is performed by the producer.
The device is sealed with a special film seal located in the battery compartment and
covering the screw heads, whereas the screws fasten the lower cover.
Removal of seals and repeated sealing is performed by the company in charge of repair
and verification.
1.6 Packing
The dosimeter kit (the device and the operating manual) is delivered in the
cardboard box. Cardboard and polymer (blister) combination is permitted.

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2 PROPER USE OF THE DOSIMETER
2.1 Operating limitations
Operating limitations are presented in Table 2.1.
Table 2.1 - Operating limitations
Operating limitations Limitation parameters
Ambient air temperature from - 25 to + 50 oC
Relative humidity up to 95 % at + 35 oC, non-condensing
Photon-ionizing radiation influence DER up to 1.0 Sv/h during 5 min
Note. If operating in the dusty environment or during atmospheric precipitations the
dosimeter should be placed into a plastic bag or a special case.