Polimaster PM1621M User manual

X-RAY AND GAMMA RADIATION PERSONAL DOSIMETER
РМ1621M (PM1621MA)
OPERATING MANUAL
2

CONTENTS
1 DESCRIPTION AND OPERATION OF THE INSTRUMENT.............5
1.1 Application of the instrument...........................................................5
1.2 Delivery kit.......................................................................................6
1.3 Specifications ..................................................................................7
1.4 Design and theory of operation .......................................................12
2 USE OF THE INSTRUMENT.............................................................16
2.1 General guidelines ..........................................................................16
2.2 Safety instructions...........................................................................16
2.3 Preparation for use..........................................................................16
2.4 Use of the instrument ......................................................................16
3 MAINTENANCE.................................................................................26
4 TROUBLESHOOTING.......................................................................27
5 STORAGE AND SHIPPING ..............................................................28
6 WARRANTY......................................................................................29
ATTACHMENT A Overall dimensions. Effective center of the detector......................30
ATTACHMENT B Diagram of instrument rotation to measure angular response .....31
ATTACHMENT C Typical instrument anisotropy. .........................................................32
ATTACHMENT D Typical instrument energy dependence relative
to the energy 662 keV of 137CS gamma radiation.............................33
3

This manual is intended to describe the design, operation and use of the X-ray and
gamma radiation personal dosimeter PM1621M (PM1621MA) (hereinafter referred to as the
device or instrument).
The Operating Manual includes the general description, specifications of the
instrument, as well as other information necessary for the proper operation of the instrument
and understanding of device capabilities.
Changes may be made to the instrument electrical scheme, construction, design and
software that do not influence the specifications and, therefore, may be not specified in this
manual.
4

1 DESCRIPTION AND OPERATION OF THE INSTRUMENT
1.1 Application of the instrument
The PM1621M (PM1621MA) X-ray and gamma radiation dosimeter is designed to provide:
- continuous measurement of the personal dose equivalent (hereinafter referred to as
dose equivalent or DE) of external gamma and X-ray (hereinafter photon) radiation
;
( )
НР10
- continuous measurement of the time DE accumulation;
- continuous measurement of the personal dose equivalent rate of external photon
radiation (hereinafter dose equivalent rate or DER);
(
)
•
Нр10
- search, detection and localization of gamma radiation sources;
- communication of information accumulated and stored in the device’s non-volatile
memory through an infra-red (IR) communication channel (the protocol is compatible with
IrDA interface) into a personal computer (PC) using an internal or external IR adapter.
Instruments may be used independently or as a part of a system for everyday, efficient
and emergency dosimetric control of personnel, production facilities and units where there is
a potential or real risk of exposure to external X-ray and gamma radiation. Customs and
border officers, personnel of nuclear facilities; radiological and isotope laboratories; officers of
the emergency services; civil defense, fire brigades, police, as well as in other spheres where
measurement of personal dose equivalent and personal dose equivalent rate will be notified
by an alarm when the preset dose and dose rate levels are exceeded. Information about the
dose accumulation and dose rate over time, as well as association of the measured
parameters with an individual makes systematization and complex analysis of the
accumulated dosimetric information feasible.
Operating conditions:
-ambient air temperature from minus 40оСup to plus 60оС;
- relative humidity up to 98 % at the temperature 35оС;
- pressure from 84 up to 106,7 kPa.
5

1.2 Delivery kit
1.2.1 Delivery kit of the instrument is specified in the table 1.1.
Table 1.1
Item Quantity, pcs.
X-ray and gamma radiation dosimeter РМ1621М
(PM1621MA)
1
CD Disk with “System of Data Collection and
Processing for the 1621/1603/1604 Devices” software
1
Operating manual 1
Package 1
Alkaline AA-type battery (РANASONIC POWER LINE
LR6 or similar) 2) 1
Accessories: 1)
Infrared communication kit 1
Pouch1) 1
Alkaline AA-type battery (Energizer L91BP-2 or
similar) 3) 1
1) Available as an option by special order.
2) Used within the temperature range of minus 20 – plus 60 °C. Usage of other
batteries with similar parameters is allowed.
3) Used within the temperature range of minus 40 – plus 60 °C. Usage of other
batteries with similar parameters is allowed.
6

1.3 Specifications
1 Operating mode: - indication of photon radiation DER;
- indication of photon radiation DE;
- indication of the instrument’s number;
- PC data exchange;
- search;
- indication of the audible alarm;
- indication of the vibration alarm;
- set mode;
- indication of partial and critical battery
discharge;
- audible, vibration and visual (blinking red
LED) alarming at exceeding of the preset DE
or DER thresholds.
2 DER measurement range:
- for the РМ1621M modification 0.1 µSv/h - 100 mSv/h;
- for the РМ1621MАmodification 0.01 µSv/h – 2.00 Sv/h.
- DER indication sub-range 0.01 – 9.99 µSv/h;
10.0 – 99.9 µSv/h;
100 - 999 µSv/h;
1.00 – 9.99 mSv/h;
10.0 – 99.9 mSv/h;
100 - 200 mSv/h;
100 - 999 mSv/h (РМ1621MА);
1.00 – 2.00 Sv/h (РМ1621MА).
- DER analogue scale (seven
segments) in a logarithmic gauge
Number of indicated segments (from left to
right) corresponds to the following DER
threshold values on the LCD display:
- one segment - ≥0.1 µSv/h;
- two segments - ≥1 µSv/h;
- three segments - ≥10 µSv/h;
- four segments - ≥100 µSv/h;
- five segments - ≥1 mSv/h;
- six segments - ≥10 mSv/h;
- seven segments - ≥100 mSv/h.
3Maximum permissible intrinsic relative
error of DER measurement
±(15 + К1/!+ К2!) %,
where !- DER value, mSv/h;
К1– coefficient 0.0015 (mSv/h);
К2– coefficient 0.01 (mSv/h)-1.
4 DE measurement range 1.0 µSv - 9.99 Sv;
Maximum permissible intrinsic relative
error of DE measurement
±15 %.
5 DE indication range 0.01 µSv – 9.99 Sv.
Indication sub-ranges: 0.01 – 9.99 µSv;
10.0 – 99.9 µSv;
100 – 999 µSv;
1.00 – 9.99 mSv;
10.0 – 99.9 mSv;
100 - 999 mSv;
1.0 – 9.99 Sv.
7

6 Discreteness of DE accumulation
time indication 1 h.
7 The instrument provides inputting, storage in a non-volatile memory and continuous
control of two threshold DER and DE levels within the whole measurement range. When
the preset first and second DER and DE alarm threshold levels are exceeded the
instrument produces audible, vibration and visual (blinking red LED) signals.
Discreteness of threshold level setting Unit of lower-order indicated position.
8 Registered energy range 0.01 – 20 МeV.
Energy response relative to 0.662
MeV (137Cs) (see Attachment D), no
more than
±30 %.
9 Anisotropy (see Attachment C)of the device for each energy does not exceed values (in
%) presented in Table 1.2, when the device is rotated in the horizontal plane
(Attachment B, figure B.1) and values (in %) presented in Table 1.3, when the device is
rotated in the vertical plane (Attachment B, figure B.2).
Table 1.2
Energy of gamma radiation, MeV
Anisotropy
A
ngle of detection relative to the
direction of graduation, °
0.059 0.662 1.25
0 0 0 0
15 ±5 ±5 ±5
30 ±10 ±10 ±10
45 ±20 ±15 ±15
60 ±40 ±20 ±20
-15 ±5 ±5 ±5
-30 ±10 ±10 ±10
-45 ±20 ±15 ±15
-60 ±40 ±20 ±20
Table 1.3
Energy of gamma radiation, MeV
Anisotropy
Angle of detection relative to
the direction of graduation, °
0.059 0.662 1.25
0 0 0 0
15 ±5 ±5 ±5
30 ±10 ±10 ±10
45 ±20 ±15 ±15
60 ±40 ±20 ±20
-15 ±5 ±5 ±5
-30 ±10 ±10 ±10
-45 ±20 ±15 ±15
-60 ±40 ±20 ±20
10 Coefficient of variation (deviation of the
instrument’s readings caused by statistic
fluctuations) at DER measurement at a
confidence coefficient 0,95, no more than
±15 %.
8

11 Maximum permissible additional relative
error of DER measurement:
- at temperature variations from minus 40
to plus 60°С ±10 %;
- at relative humidity of ambient air 98 %
at 35 °С
±10 %;
- at power voltage variations from
nominal value to limiting voltage values
±10 %;
- on exposure to magnetic field of 400 A/m
strength
±5 %;
- on exposure to radio frequency
electromagnetic fields of 10 V/m strength
±5 %.
12 LCD backlight at pressing LIGHT/SET
button 3-5 s.
13 Instability of readings during 24 hou
r
continuous work, no more than
±5 %.
14 Response time (according to IEC 61526),
when DER value is increased more than
10 times from initial DER value to finite
fixed high DER value exceeding 10 µSv/h,
no more than
5 s.
15 Response time(according to IEC 61526)
when DER value is decreased more than
10 times, from initial high to finite fixed low
DER value exceeding 10 µSv/h, no more
than
10 s.
16 PC communication
- by special software using IR
communication channel adapter.
17 In the PC data exchange mode the
instrument provides the following
functions:
1) permission or prohibition of the
following operating modes (parameters) of
the instrument:
- DER indication;
- indication of DER coefficient of
variation;
- indication of DER averaging time;
- DE indication;
- indication of DE accumulation time;
- indication of time remaining for stay at
the working place depending on the
current measured DER and DE values;
- indication of the instrument’s number;
- audible alarm;
- preset of the DE and DER threshold
levels using the buttons;
- DE reset using the buttons.
9

2) read-out of the following information
from the instrument to PC:
- instrument’s parameters;
- DER history and DE accumulation
(date, time, event, value);
- DE (DER) values at the moment of
exceeding the preset thresholds as well
as time, date and month of exceeding the
preset thresholds;
- values of the preset DE and DER
thresholds;
- official information
3) recording of the following information
from PC to instrument:
- instrument’s parameters;
- values of DE and DER thresholds;
- interval of DER history and DE
accumulation recording;
- current time and date for forming DE
accumulation history;
- official information.
18 In the search mode the instrument
provides the following functions:
- turn on/ off the search mode;
- detection and localization of photon
radiation sources by change in
frequency of audible, vibration and
visual alarms;
- indication the search mode ON/OFF.
19 In the mode of indication of the audible
alarm the instrument provides the
following functions:
- turn on/off the audible alarm;
- indication of turning ON/OFF of the
audible alarm;
- sound pressure level control and
indication in the analog (scale) and
digital formats (from 1 to 4).
20 In the mode of indication of the vibration
alarm the instrument provides the
following functions:
- turn on/off the vibration alarm;
- indication of turning ON/OFF of the
vibration alarm.
21 Power supply 1.5 (+ 0.1; minus 0.4) V (one AA type
battery).
22 Period of continuous operation of the
instrument from one battery, using LCD
backlight not more than 5 s/day, audible
alarm – not more than 20 s/day and at an
average value of the measured DER up
to to 0.3 µSv/h:
- at a temperature from 0 up to 60оС12 months;
- at a temperature minus 40, at least: 6 months.
23 Protection degree of the instrument’s
case
IP67 .
10

24 The instrument is proof against:
- temperature of an ambient air from
minus 200Сup to plus 600Сwith
indication of measurement results on
LCD;
- temperature of an ambient air from
minus 40 up to minus 20°Сwithout
indication of measurement results on
LCD but with recording of measurement
results in a non-volatile memory;
- relative humidity of an ambient air up
to 98 % at 350С;
- atmosphere pressure from 84 up to
106,7 kPa.
25 The instrument is proof against:
- sinusoidal vibration in the frequency
range 10 – 55 Hz and bias amplitude for
frequencies lower than the transition
frequency 0.35 mm;
- shocks with acceleration 100 m/s2,
duration of shock pulse 2-50 ms, shock
rate is 60 - 180 shocks per minute.
26 The instrument meets drop test against
a concrete surface from the height 0,7 m.
27 The instrument is proof against static
and variable magnetic fields of strength up to 400 А/m.
28 The instrument is proof against the
action of radio frequency
electromagnetic fields in the frequency
range 26 – 1000 MHz of strength
up to 10 V/m.
29 The instrument in a transport package is
proof against:
- temperature from minus 50 up to plus
500С;
- humidity up to 100 % at 400С;
- shocks with acceleration 98 m/s2,
duration 16 ms;
- vibrations with frequency 10-55 Hz and
bias amplitude 0.35 mm.
30 Weight (with battery) no more than 0.16 kg.
Weight in package no more than 0.3 kg.
31 Dimensions 87х72х35 mm.
32 Reliability parameters:
- average full operating time no less than 20000 h;
- average service life no less than 10 years
- average time of recovery no more than 60 min.
N o t e – For additional information about instrument, please visit www.polimaster.com.
11