PERSONAL RADIATION DETECTORS Operation

PM1703M
PM1703GN
PM1703MA
PM1703GNA
PERSONAL RADIATION DETECTORS
Operation Manual
CONTENTS
1 Description and Operation.............................................................................................................. 3
1.1 General Information ............................................................................................................... 3
1.2 Delivery Options..................................................................................................................... 5
1.3 Specifications.......................................................................................................................... 6
1.4 Design ..................................................................................................................................... 9
2 Operation ........................................................................................................................................ 12
2.1 Pre-Operation.......................................................................................................................... 12
2.1.1 General information ....................................................................................................... 12
2.1.2 Safety Precautions ........................................................................................................... 12
2.1.3 Battery Installation .......................................................................................................... 12
2.1.4 Functional Check ............................................................................................................ 12
2.2 Detector Operation ................................................................................................................. 15
2.2.1 Turning the detector ON/OFF ......................................................................................... 13
2.2.2 Low Battery Indication .................................................................................................. 13
2.2.3 Operation Modes ............................................................................................................. 13
2.2.3.1 Test mode .................................................................................................................. 14
2.2.3.2 Calibration mode by background level ...................................................................... 14
2.2.3.3 Search mode. detection and location of gamma and/or neutron radiation sources ... 15
2.2.3.4 DER measurement mode ........................................................................................... 17
2.2.3.5 Neutrons registration mode ....................................................................................... 17
2.2.3.6 Mode displaying the average count rate of neutron registration for
the accumulation time............................................................................................................ 17
2.2.3.7 Set mode .................................................................................................................... 17
2.2.3.8 Setting the alarms ...................................................................................................... 19
2.2.3.9 PC communication mode........................................................................................... 20
3 Maintenance ................................................................................................................................... 22
4 Troubleshooting.............................................................................................................................. 22
5 Calibration Test Procedure (reference) ......................................................................................... 23
6 Storage and Shipping...................................................................................................................... 26
7 Limited Warranty ........................................................................................................................... 27
Attachment A Detector operation modes and functions chart ......................................................... 29
Attachment B Detector Typical Energy Response in Search Mode ................................................. 30
2
Thank you for purchasing a Polimaster Personal Radiation Detector.
Before operating this unit, please review this manual thoroughly, retain it for future reference
and use the unit for its intended application.
When in use, don't keep the instrument in immediate proximity to radio emitting sources,
such as cell phones, to avoid false alarms.
Avoid mechanical shocks and damages, corrosive media, organic solvents, open fire,
submerging the unit into water and other unfavorable effects.
After the localizing of a radiation source observe the rules and regulations of working with
radiation sources, and take all the necessary radiation precaution measures.
1 DESCRIPTION AND OPERATION
1.1 General Information1)
The Personal Radiation Detector
 РМ1703М
 РМ1703МA
 РМ1703GN
 РМ1703GNА
Further referred to as “detector” is designed
- for the search (detection and localization) of radioactive and nuclear materials2) using the method
of impulse count analysis when registering gamma (and neutron)2) radiation with alarms and with the
visualization on the built-in LCD of the average gamma radiation count rate and the average neutron2)
radiation count rate (in the detector with neutron radiation detector)2);
- for the measurement of gamma radiation ambient dose equivalent rate *(10) for 137Cs in the
collimated radiation (further referred to as “DER”).
The detectors can be used both indoors and outdoors by a wide range of users who in their everyday
work deal with the search and localization of radiation sources.
All operations history is stored in the detector’s permanent memory, protecting the data even when
the battery is removed. The stored data can also be transferred from the detector to a personal computer
(PC) via its infrared interface.
1)
Some changes may be introduced in the instrument electrical scheme, construction, design and software that do not influence
the specifications and, therefore, may be not specified in this manual.
2)
РМ1703GN, РМ1703GNA
3
Consult the Table 1.1 to find out which features are enabled in your particular Gamma or GammaNeutron Personal Radiation Detector.
Table 1.1
РМ1703М РМ1703МА РМ1703GN РМ1703GNА
Detector type
- CsI (Tl) scintillator 3 сm
3



n- LiI (Eu) scintillator1 сm
3
-CsI (Tl) scintillator 4 сm
3
Increased -detector sensitivity
n-LiI (Eu) scintillator 2 сm
3
Increased n-detector sensitivity



ATTENTION!
The detectors of PM1703 series have a number of operation modes described further.
However, trying to meet the demands of every customer, Polimaster customizes every single piece of
sold equipment according to the specific order.
Certain modes may be independently switched on/off by the customer using the Polimaster
PRD software supplied with the detector.
Operation modes included by the manufacturer in your particular detector comply with the
Order chart (Appendix А) and are described below.
4
1.2 Delivery Options
Delivery kit of the detector corresponds to the Table 1.2.
Table 1.2
Quantity, pcs.
Description
РМ1703М
Personal radiation detector PM1703М
Personal radiation detector РМ1703МА
Personal radiation detector РМ1703GN
Personal radiation detector РМ1703GNA
Polimaster PRD Software on CD
Power supply cell (Alkaline), 1.5V, not less than 2,000 mA/h,
AA (LR6)
Holster1)
IR communication adapter (ACT-IR220L or IR210B)1) 2)
Operation manual
User packing box
1)
Is ordered separately;
2)
Other similar devices can be used.
РМ1703МА
РМ1703GN
РМ1703GNА
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
-
5
1.3 SPECIFICATIONS
1.3.1 Gamma Sensitivity, at least
РМ1703М
РМ1703GN
100 s-1/(Sv/h) – for 241Am;
85 s-1/(Sv/h) – for 137Cs
РМ1703МА
РМ1703GNА
200 s-1/(Sv/h) – for 241Am;
100 s-1/(Sv/h) – for 137Cs
1.3.2 Neutron Sensitivity, at least
PM1703GN
PM1703GNА
1.3.3 Energy Range of gamma radiation (Typical energy
response in the search mode see in Appendix B).
1.3.4 Energy Range of neutron radiation
PM1703GN
PM1703GNA
0.035 (countscm2)/neutron – for Pu--Be;
1.2 (countscm2)/neutron – for thermal neutrons
0.07 (countscm2)/neutron – for Pu--Be;
1.5 (countscm2)/neutron – for thermal neutrons
from 0.033 to 3.0 MeV
From thermal to 14.0 MeV
1.3.5 Photon radiation DER indication range
0.01 – 99.99 Sv/h
1.3.6 Gamma count rate indication range
001 – 9999 s-1
Neutron count rate indication range
001 – 999 s-1
PM1703GN
PM1703GNA
3.7 Accuracy of DER measurement in the range from 0.1
to 70 Sv /h (at 137Cs in the collimated radiation), no more  30 %
1.3.8 False alarms rate in the gamma radiation search
mode with gamma channel coefficient
n=5.3
no more than 1 per 10 hours of continuous
operation;
n=4.5
no more than 1 per 60 minutes of continuous
operation
False alarms rate in the neutron radiation search mode with no more than 1 per 10 hours of continuous
neutron channel coefficient
operation
n=4.0
1.3.9 At preset gamma coefficient n = 5.3 (number of meansquare deviation of current radiation background) and gammaradiation background level is no more than 0.25 µSv/h, time
to alarm once the radiation background is increased by
0.5 μSv/h in a period of not more than 0.5 seconds using
241
Am, 137Сs, 60Сo gamma sources, no more
2s
At preset gamma coefficient n = 5.3 and gamma-radiation
background level is no more than 0.25 µSv/h, time to alarm
once the radiation background is increased gradually by
0.5 μSv/h using 137Сs gamma sources at a velocity of not more
than 0.5 m/s, no more
2s
6
1.3.10 Response time (indication of new DER with relative
error of ±20 %) after the radiation background is increased
by 1 µSv/h in a period of not more than 0.5 seconds using
137
Cs gamma source, no more
4s
1.3.11 At preset gamma coefficient n = 5.3 and gammaradiation background level is no more than 0.15 µSv/h, the
detector should detect gamma radiation sources with the
probability 0.95
according to Table 1.3 below
At preset gamma coefficient n = 4.5 and gamma-radiation
background level is no more than 0.25 µSv/h, PM1703MA,
PM1703GNA should detect gamma radiation sources with the
probability 0.95
according to Table 1.4 below
1.3.12 PM1703GNA placed on a PMMA (polymethylmethacrylate) phantom should respond within 2 s:
- if radiation background is increased because of fast (in less than 2 s) moving a 300 g Pu special sample or
0.01 µg 252Cf alternative neutron source (2104 neutrons/s to spherical angle 4) towards the detector to a
distance of 25 cm, at preset gamma coefficient n = 5.3;
- if radiation background is gradually increased because of slow (0.5 m/s) moving a 300 g Pu special sample
or 0.01 µg 252Cf alternative neutron source (2104 neutrons/s to spherical angle 4) towards the detector to a
distance of 10 cm, at preset gamma coefficient n = 5.3.
1.3.13 PM1703GN, PM1703GNA placed on a PMMA phantom should detect in 45 out of 50 trials a 300 g Pu
special sample or 0.01 µg 252Cf alternative neutron source (2104 neutrons/s to spherical angle 4) moved
past the detector at an average velocity of 0.5 m/s at the closest distance of 10 cm, at preset gamma
coefficient n = 5.3
1.3.14 Battery lifetime
at least 1,000 h
1.3.15 Background calibration
- automatic – after the detector is turned ON,
an coefficient n change, background change;
- user initiated
1.3.16 Alarm type
- audio tone;
- vibration;
- visual
1.3.17 PC Communications through IR channel at an up to -- reading of the history from detector memory;
0.2 meter distance
- setting the detector parameters
1.3.18 Data Collection
1000 data points
1.3.19 Environmental:
- temperature range;
- 30 to + 50 С
(LCD: - 20 to + 50 С)
- humidity
by 98 % at +40 C
1.3.20 Constant and alternating magnetic fields resistible,
field strength
1.3.21 Electrostatic discharge resistible
1.3.22 Radiofrequency electromagnetic fields resistible
1.3.23 Environmental protection
by 800 А/m
8 kV (air discharge),
6 kV (contact discharge)
10 V/m in the range of frequencies from 80 to
1000 МHz
50 V/m in the range of frequencies from 80 to
960 МHz and from 1.4 to 2.5GHz (under
interference emission from digital wireless
phone)
IP65
7
1.3.24 Drop test
0.7 m
1.3.25 Power requirements
1.5 V
(one cell Alkaline AA (LR6)), no less than
2000 mA/h
1.3.26 Dimensions (without clip), no more
1.3.27 Weight (without holster), no more
72 x 32 x 87 mm
PM1703М
PM1703GN
180 g (6.35 oz)
PM1703МА
PM1703GNА
200 g (7.05oz)
Table 1.3
Parameter
241
Gamma source activity, MBq 30 %
Moving speed (source/ detector), m/s
Distance between source and detector , m
Am
20.0
0.50.05
0.40.005
Source type
137
Cs
1.0
0.50.05
0.40.005
60
Co
0.25
0.50.05
0.40.005
Table 1.4
Parameter
133
Gamma source activity, kBq (µCi)
Moving speed (source/ detector), m/s
Distance between source and detector , m
Ba
55.0(1.5)
0.50.05
0.20.005
Source type
137
Cs
100.0 (2.7)
0.50.05
0.20.005
60
Co
50.0 (1.35)
0.50.05
0.20.005
8
1.4 Design
Instrument is made of a shockproof plastic protected against water jets and dust. The instrument, its
functional parts, detectors, their effective centers and direction of calibration are shown in Figure 1.
Two control buttons MODE
and LIGHT
, liquid crystal display (LCD), Infrared (IR)
interface window, light emitting diode (LED) are located on the detector top panel, Figure 1.
1 MODE button:
- Turns the detector on;
- Selects the operation mode;
- Performs background recalibration;
- Changes parameters in the Set mode.
2
LIGHT button:
- Switches on LCD light;
- Enables the PC communication mode;
- Changes parameters in the Set mode;
- Turns the detector off.
3 – IR window.
4 – Light Emitting Diode (LED).
5 – The upper LCD line used to display the following information:
- count rate, s-1 (in the Search mode);
- gamma DER values, μSv/h (in the DER measurement mode);
- messages “test”, “CAL.”, “OL”, “OFF”, “Р-XX.” etc.;
- alarm type (sound or vibration).
6 – The analogue scale of 19 segments is used for:
- indicating of time left of the internal processor tests – decrease of the segments number up to their
disappearance;
- indicating of time left of calibration by the background level – increase of the segments number up to the scale
filling.
7 – Critical battery discharge.
8 – Pictograms indicating the parameters of gamma radiation.
9 – Dimension of the indicated value:
- “s-1” – in the gamma radiation Search mode;
- “μSv/h” – in the DER measurement mode.
10 – The lower LCD line is used to display the following information:
- mean square error of the count indication, %;
- count rate of the neutron radiation, (s-1) 1).
11 – Battery cover.
12 – Battery.
13 – Sound alarm.
The detectors come with a clip which may be used to fasten the detector to a waist belt or pocket.
The clip may be easily removed from the detector by using a screwdriver or similar tool according to
instructions depicted in the figure 2a). Draw aside the spring from the latch using a screwdriver and
carefully move the clip towards the face panel. Install the clip as shown in Figure 2 b). Put the clip on the
bracket and move until it latches.
Optionally, the detector may be supplied with a synthetic protective holster which may be worn at
the waist belt. When the holster is used, it is recommended to remove the clip.
1)
РМ1703GN, РМ1703GNA
9
Figure 1
10
a)
b)
Figure 2
11
2 OPERATION
Attention! When using the detector in ambient temperatures below minus 20 С the normal
operation of the detector LCD is not guaranteed. In this case you can still use it by monitoring sound
and vibration alarms. The LCD functioning will be restored after its returning to normal operation
temperature.
2.1 Pre-Operation
2.1.1 General information
Check the detector’s delivery kit according to Table 2.1 and its functionality according to Clause
2.1.4.
Remove the detector from its package and install the battery. Before operating the detector, review
this operation manual thoroughly and retain it for the future references.
2.1.2 Safety Precautions
The detector is a safe product provided it is used for its intended application and according to the
operating manual. The detector is powered by a 1.5 V battery. There are no live parts with dangerous
voltage and current accessible under normal operation. RF electromagnetic fields, electrostatic fields,
equivalent and maximum level of sound and level of local vibration comply with safety requirements.
After the localizing of a radiation source observe the rules and regulations of working with
radiation sources, and take all the necessary radiation precaution measures.
2.1.3 Battery installation
The detector is packaged without the battery installed.
To install the battery open the cover (11 in the figure 1) located on the right end of the unit with a
coin or screwdriver. Once opened, insert a single AA alkaline battery (12 in the figure 1) loading the
positive (+) end first. Reinstall the cover and tighten it. If the battery is properly installed, the detector will
turn on automatically.
2.1.4 Functional Check
The detector should correctly go through self-tests, background calibration and turn into operating
mode (2.2.1) and other modes (2.2.3).
12
2.2 Detector Operation
2.2.1 Turning the detector ON/OFF
2.2.1.1. To turn detector, press the MODE button
Immediately after that the LCD backlighting will be switched on and all LCD
segments will be activated at the same time approximately for 1 s, alarm (audio
and/or vibration) will be switched on, and the detector will enter the Test mode
(2.2.3.1). In the Test mode, the LCD shows the firmware version P-X.X for several
seconds (for example, Р-1.4)1). Upon the test completion the detector enters the
Background calibration mode (2.2.3.2). The analogue scale is indicated on the LCD
with the number of segments increasing in time, as well as the “САL” message.
Upon the background calibration mode completion, the detector turns into the
search mode or DER indication mode according to the order chart (see Appendix
A). The detector is ready for operation.
2.2.1.2 To turn detector OFF, press and hold the LIGHT button for 5 seconds until the LCD
screen displays the “OFF” message.
Attention! The detector is automatically turned off (“OFF” is displayed on the
LCD) after reading the detector operation history in the PC communication
mode).
2.2.2 Low Battery Indication
When the battery voltage drops below 1.1 V, the Low Battery warning sign will be displayed and
the detector will provide periodical visible and sound and/or vibration tone indicating the need to replace
the battery.
N o t e – You have 8 hours (at normal background level) before the battery is completely
discharged. The user can turn off the low battery warning for 30 minutes by pressing the MODE
button. Turn OFF the detector and follow the previous instructions to replace the battery.
2.2.3 Operation modes
Operation modes included by the manufacturer in your particular detector comply with the
order chart (Appendix А).
The detector has the following operation modes:
- Operation modes:
- the Search mode (indication of an average count rate, s-1);
- the DER measurement mode;
- the Neutron registration mode;
- the Mode displaying the average count rate of neutron registration for accumulation time.
- Auxiliary modes:
- the Test mode;
- the Background calibration mode;
- the Set mode:
- set the coefficients n;
- selection of the audio and/or vibration alarms;
- set the sound alarm volume.
- PC communication mode through IR channel.
1)
The firmware version may differ from given.
13
2.2.3.1 Test mode
The detector enters this mode just after turned on.
Before the beginning of the testing process the alarms (audio and/or vibration) are
activated approximately for 1 s. All marks, segments will be indicated on the LCD.
Then the LCD shows the firmware version (P-1.4)1) for several seconds.
In the Test mode all the required tests are fulfilled. Initially, the battery discharge
level is tested. The “bAtt” message is indicated on the LCD, remaining battery power
in relative units on the analogue scale.
Then the “test” message is indicated and the decreasing analogue scale. The tests are
performed. The time to test completion is displayed in relative units in the form of the
decreasing analogues scale.
Upon the test completion the detector enters the Background calibration mode. The
analogue scale is indicated on the LCD with the number of segments increasing in
time, as well as the “САL.” message.
2.2.3.2 Calibration mode by background level
The detector enters this mode automatically after completion of the Test mode, at this the “CAL.”
(calibration) message is indicated on the LCD.
In the Calibration mode the detector performs the analysis of the gamma and neutron2)
background level.
Attention! Below you will find the principles of work of the detector gamma
channel. Functioning of the neutron1) channel is much more complicated and is not
described in this manual.
The processor counts the number of pulses coming from the detection block during the preset
calibration time, while analogue scale on the LCD shows time elapsed from the beginning of the
calibration process in relative units. 100 % filling of the analogue scale means that calibration has been
completed. When the detector is calibrated on user demand the calibration time depends on the background
radiation level - the higher is the background level, the less time is required for detector calibration.
The processor calculates the gamma channel threshold value with reference to the background
level and the n-coefficient.
Coefficient n changes the alarm threshold value (minimal detection level). The less the coefficient
n, the less the threshold value is and the higher the detector sensitivity is. However decreasing the
coefficient n also increases the probability of false alarms. Coefficient n is specified in the Set mode if it is
allowed by the administrator when he/she adjusts the global settings after connecting the detector to a PC
(factory-preset value of the coefficient n accordance with the Appendix A). The coefficient can be
specified in the range between 1 and 9.9 with step 0.1.
To recalibrate a detector according to a changed background it is necessary to press the MODE
button and hold it for 2 s until “CAL.” is displayed on the LCD, where an analogue scale is also displayed
showing the calibration progress.
The Autocalibration function can be enabled in the PC communication mode. This function makes
it possible to retain the high sensitivity of the detector in the conditions of lowering background radiation
level and avoid false alarms at its gradual rising.
The detector is highly sensitive to the changes of the ambient background radiation level. So the
detector can “chirp” when you move from open (street) to close space (a room in the building). Usually
buildings are contrasted from materials containing natural isotopes (potassium, thorium, radium, uranium
and so on) that increase natural ambient background radiation level. Concrete and other building materials
containing sand, natural stone (especially granite), as well as glass, ceramic tile and so on are among these
materials. In this situation the auto calibration doesn’t turn on. The user is recommended to recalibrate the
1)
2)
The firmware version may differ from given.
РМ1703GN, РМ1703GNA
14
detector manually to adjust the alarm threshold to new background level or the user can reset the n
coefficient to adjust the detection threshold.
When background calibration is finished, the detector automatically enters the operation mode
according to the order chart (see Appendix A).
2.2.3.3 Search mode. Detection and localization of gamma and/or neutron1) radiations sources
2.2.3.3.1 The detector enters this mode upon calibration completion (if the search mode is enable
according to the order chart, Appendix A).Being in the Search mode the detector shows the gamma channel
count rate in the LCD upper line, s-1.
The following is indicated in the LCD lower line:
РМ1703М
РМ1703МА
PM1703GN
PM1703GNА
Mean square error of gamma channel count rate in percents.
Mean neutron1) channel count rate in s-1.
Overload information:
All modifications
PM1703GN
PM1703GNА
If the mean gamma channel count rate exceeds the upper limit
of the indication range you will see “OL” message on the LCD
If the mean neutron1 channel count rate exceeds the upper limit
of the indication range you will see a blinking “999” message
on the LCD
In this mode the detector automatically compares the average count rate with the following
threshold values:
1) The Fixed DER threshold (safety threshold) specified during the PC communication mode.
When this preset threshold is exceeded, the detector will produce the light, single-tone audio and/or
vibration periodic signals with constant one second interval, which allows the user to distinguish between
situations of exceeding the DER threshold and Alarm threshold.
2) Gamma channel alarm threshold (minimum detection level) is calculated in the Calibration
mode and takes into account the changes in the background level. When this threshold is exceeded, the
detector produces light, audio and/or vibration signals, the frequency of which is increased as the detector
is moved closer to the gamma radiation source. The whole detectable energy range of gamma radiation is
divided into four energy channels. Three channels correspond to the zones of low, average, and high
energies, whereas the forth one - to the whole energy range of gamma radiation. The alarm threshold is
calculated separately for each channel.
Every quarter of a second the processor counts impulses for each of the channels coming from the
detection block and retains this number in its memory. Each quarter of a second the number of impulses for
the latest (newest) interval is added to the current sum, while the number of impulses for the oldest (first)
interval is subtracted from the sum of impulses (the current average). Thus the number of impulses stored
in the processor for each channel is updated each quarter of a second.
1)
РМ1703GN, РМ1703GNA
15
The current average number of impulses is compared each quarter of a second with the alarm
thresholds calculated during the Calibration mode. If the current average number of impulses for any of
the channels exceeds the threshold value, a light, audio, and/or vibration alarms are activated.
3) Neutron1 channel alarm threshold, minimum detection level is calculated in the Calibration
mode and takes into account the changes in the background level. When this threshold is exceeded, the
detector produces audio, light and/or vibration double signals with a constant interval between them which
allows the user to distinguish between situations of exceeding of the Gamma and Neutron channel
thresholds.
In the Search mode the detector resolves problems of detection and localization of gamma and
neutron1 radiations sources.
2.2.3.3.2 Detection of gamma and neutron1) radiation sources
To detect a radiation source the detector should be held so that its back side (with clip) is always
directed at the inspected object (luggage, person, car, container, etc.). The closer is the detector to the
inspected object and the slower it is moved along it, the higher will be the detection effectiveness.
Use vibration and visual alarms in situations when audio alarms cannot be heard (noisy environment).
You have to remember that detector sensitivity and the frequency of false alarms depend on:
- the current preset gamma channel coefficient n;
- the current preset neutron1) channel coefficient n;
- the background level calculated by the detector in Calibration mode by the background level.
If autocalibration is enabled in PC communication mode, the detector automatically considers slow
background changes and recalibrates each 10 minutes if the background level is decreasing, or in a little
longer periods of time when the background radiation level is increasing. However, the automatic
recalibration is performed only if there were no alarms or rapid radiation level change during algorithmdefined periods of time.
You can encounter false alarms during the detection process, but they can be easily distinguished
because they appear very seldom and irregularly, whereas real alarms are regular and their frequency
increases as the detector is moved closed to a radiation source.
After a radiation source has been detected you can proceed to its localization.
2.2.3.3.3 Localization of gamma and neutron1) radiation sources
For the localization of radiation sources it is necessary to hold the detector not farther than 10 cm
from the inspected object and move it along the object not faster than 10 cm/s. As the detector moves
closer to the radiation source, the frequency of audio, light and/or vibrating signals increases, thus enabling
the user to determine the direction toward the source location.
If audio alarm is enabled, the detector produces audio signals together with a flashing red LED
light. If vibration alarm is enabled, there are mechanical vibrations inside the detector together with a
flashing red LED light.
When the alarm signals frequency reaches the maximum value, it is necessary to run the
background calibration procedure. During the recalibration it is important to keep the detector in the same
place if possible and press and hold the MODE button until “CAL.” is displayed. Once the background
calibration is completed, the user may then continue to localize the radiation source. This procedure may be
repeated as many times as necessary until the gamma radiation source is located.
To locate a neutron radiation source or a mixed gamma and neutron radiation source, it is
recommended to turn OFF the audio and vibration alarms because detector will alarm that the neutron
alarm threshold is exceed without changes when the distance between the detector and the source is
increased or decreased. In this case it is recommended to locate the source visually by monitoring the
numerical values of gamma and neutron count rates on the display.
1)
PN1703GN, PM1703GNA
16
2.2.3.4 DER measurement mode
The detector enters this mode automatically upon calibration completion if the
search mode is turned off, or by pressing MODE button.
When in the DER measurement mode, the upper line of the LCD screen
indicates the dose equivalent rate H* (10) in µSv/h, while the lower line indicates the
mean square error of DER indication in percents.
If DER value exceeds the upper limit of the measurement range more than 1.3 times, the LCD will
display an overload message (OL).
DER measurement mode can be combined with Search function. The detector may perform
the searching and localizing functions in this mode. This is stipulated in the detector, if the searching
function is absent or is additionally included in the DER measurement mode (see the order chart –
Appendix A).
2.2.3.5 Neutrons registration mode1)
Neutrons registration mode is used for refining of the average count rate of
neutrons registration at small background values of neutron radiation. The detector
enters this mode from the DER measurement mode by pressing MODE button. In this
mode the number of registered neutrons is displayed in upper line of the LCD as
follows:
XXXX – at indication up to 8000 impulses.
In the lower line of the LCD n pictogram is blinking and the total time of impulses accumulation is
indicated in hours. Maximum value is 24 hours.
2.2.3.6 Mode displaying the average count rate of neutron1) registration for the accumulation time
The detector enters this mode from the neutron registration mode by pressing
MODE button. The average count rate of neutrons registration is displayed in the
upper line of the detector LCD (s-1), the lower line indicates the average error of the
measured value in percents.
To reset the accumulated neutron count press and hold the MODE button until the LCD looks as follows:
2.2.3.7 Set mode
The detector enters this mode by pressing and holding MODE button more than 5s. Then press the
Mode button to select settings that may be enabled for editing in the detector:
- coefficient n, gamma may be setup in the range of 1.0 to 9.9 with increment of 0.1;
- coefficient n, neutron1) may be setup in the range of 1.0 to 9.9 with increment of 0.1;
- enable or disable the Audio and Vibration alarms;
- sound volume value.
2.2.3.7.1 Setting the coefficient n of gamma channel
To adjust it, make sure the detector is in any of the operation modes, then press the MODE button
and hold it for more than 5 s, “CAL.” message will be displayed first. Continue to hold the MODE button
down until the detector enters the settings adjustment menu and you will immediately be able to adjust the
coefficient n of the gamma channel:
1)
PN1703GN, PM1703GNA
17
To change the coefficient n value you have to press the LIGHT button within four seconds after
entering the menu, and then press LIGHT button to increase the coefficient value by 0.1, or MODE button
to decrease it by 0.1. If you don’t press the LIGHT button within four seconds after entering this menu, the
detector will automatically return to the last operation mode. Six seconds after the last adjustment of the
coefficient value the detector calibration will be performed automatically.
2.2.3.7.2 Setting the coefficient n of neutron channel1
To adjust it, make sure the detector is in any of the operation modes, then press the MODE button
and hold it for more than 5 s, “CAL.” message will be displayed first. Continue to hold the MODE button
down until the detector enters the settings adjustment menu, the coefficient n of the gamma channel setting
will be displayed. Press the MODE button once again to switch to the coefficient n of the neutron channel
setting:
To change the coefficient n value you have to press the LIGHT button within four seconds after
entering the menu, and then press LIGHT button to increase the coefficient n value by 0.1, or MODE
button to decrease it by 0.1. If you don’t press the LIGHT button within four seconds after entering this
menu, the detector will automatically return to the last operation mode. Six seconds after the last
adjustment of the coefficient value the detector calibration will be performed automatically.
1
PM1703GN, PM1703GNA
18
2.2.3.8 Setting the alarms
2.2.3.8.1 Setting sound and/or vibration alarms
If adjusting of this setting is allowed in PC communication mode, you will be able to find it in the
settings menu. To enable or disable sound and vibration alerts, make sure the detector is in any of the
operation modes, then press the MODE button and hold it for more than 5 s, “CAL.” message will be
displayed first. Continue to hold the MODE button down until the detector enters the settings adjustment
menu. Press the MODE button twice, and you will see the Audio On/Off setting:
When the LCD displays Aud On or Off (Audio alarm) you can use the LIGHT button to change
the setting, i.e. switch on or off the sound signal. Then press the MODE button to do the same for the
vibration signal: when the LCD displays Vibr On or Off (vibration alarm) you can use the LIGHT button
to change this setting as well.
2.2.3.8.2 Setting the sound alarm volume
Beside enabling/disabling the sound alert the current detector provides a possibility to change the
sound alarm volume. To adjust this setting, make sure the detector is in any of the operation modes, then
press the MODE button and hold it for more than 5 s, “CAL.” message will be displayed first. Continue to
hold the MODE button down until the detector enters the n-coefficient adjustment menu. Press the Mode
button several times to go through the n-coefficient and alarm type adjustment menus (if it is available
according to the order chart).
If the sound alert is enabled in your detector, you will have to press the MODE button one or several
times until you see the Audio volume setting (Aud 1-5):
19
Press the Light button so that the volume value starts blinking. Now you can press the MODE
button to increase or the Light button to decrease the volume value.
Each increase or decrease is accompanied by a sound beep of the corresponding volume.
If the sound alert is disabled in your detector, you will have to press the MODE button one or
several times until you see LCD display Vibr:
Press the LIGHT button so that the LCD displays Aud and the volume value is blinking. Now you
can press the MODE button to increase or the LIGHT button to decrease the volume value. Regardless of
this setting the sound alert will not be enabled until you switch it on in the corresponding setting.
Each increase or decrease is accompanied by a sound beep of the corresponding volume.
2.2.3.9 PC communication mode
ATTENTION! Access to the PC communication mode is protected with the password.
The detector has an internal clock which is responsible for keeping track of date and time. If
the battery is removed or allowed to go dead; the clock will no longer function. To verify the clock,
the detector can be synchronized with PC using Polimaster Software. The following instructions will
walk through setting of the clock:
To synchronize the time between the detector and PC, simply connect the detector to the PC
via IrDA. Start the Polimaster software for the detector. Read the history of the detector and the
time will automatically be synchronized after reading the history or reading the settings. After that
the event history will be saved with data stamps referred to local PC time. If it is impossible to sync
time after a battery replacement, for example there is no access to the PC, change the battery and
resume operation without issue. However the internal clock will be lagging behind approximately
the duration of time there is no battery power to the detector.
2.2.3.9.1 PC communication mode through IR communication channel
It is necessary to use a personal computer together with IrDA or infra red adapter that is supplied
with detector by a separate order and software that is supplied together with the detector.
Minimum computer requirements:
- Intel Pentium;
- 128 Mb RAM;
- Windows;
- 20 Mb free on the hard disk and an adequate space available to install the database;
- 800X600 resolution of a monitor;
- IrDA.
20
If your computer is not equipped with an internal IR adapter, it is recommended to use the IR
adapter that is supplied by Polimaster by a separate order. Connect IR adapter cable to COM port of the
computer.
To install the Polimaster PRD Software on your computer, insert the installation disk and run
setup.exe from the root directory. See Polimaster PRD Software Guide for more information.
To initialize the infrared communication, place the detector 15cm away
from the infrared adapter and press the LIGHT button. When the detector enters
the PC Communication mode the message “-IR-” is displayed on the LCD screen.
N o t e - As soon as the detector’s operation history is transferred, it is deleted
from the detector memory and the detector is turned off automatically (the LCD displays “OFF”).
2.2.3.9.2 Detector parameters
Detector parameters are set up in the PC communication mode by a user-administrator (the access is
protected with a password).
The manufacturer preset default password is “1”.
The detector is supplied with the factory settings according to the order chart (see Appendix A).
In the PC communication mode the user-administrator can perform the following actions:
- to register a detector for a specific user;
- to remember the times of giving out the detector and its return;
- to read following information from the detector memory including its work history:
a) detector serial number;
b) times of detector turn on and off;
c) current gamma channel DER value in a user defined time period;
d) times and detector readings in case of exceeding the alarm threshold;
- to check and/or set up detector working parameters:
a) to switch on the audio and/or vibration alarms;
b) to synchronize the detector time and date with the current PC time and date – automatically
at each communication between detector and PC;
c) to set up the consecutive time intervals for storing the current DER values in the nonvolatile detector memory;
d) to change the administrative password (default password is “1”);
e) to check and set up the fixed threshold by DER(safety alarm threshold);
f) to check the preset or set up new values of the coefficient n for each channel determining
the alarm thresholds;
j) to enable/disable the autocalibration.
21
3 MAINTENANCE
Detector maintenance involves:
- performance of preventive works (external inspection, dust removal and deactivation, check of
detector workability (see detector on/off). Deactivation is performed by wiping with clothes moisten in
ethyl spirit;
- battery replacement.
In case of visible mechanical damages of the casing and protection glass of the LCD detector
(dents, burrs, cracks) operation of the detector is prohibited.
4 TROUBLESHOOTING
In the field, troubleshooting is limited to replacing the battery. Most of the yet encountered
problems have been reported to be because of low battery or poor battery quality. To operate this detector,
use only fresh, high-quality alkaline batteries. The detector requires very little energy which means that
while troubleshooting the unit should be allowed to stand without the battery for 1-2 minutes to allow the
internal circuits to discharge. Discharging the remaining battery power is especially important if the user is
experiencing problems with the unit.
22
5 CALIBRATION TEST PROCEDURE (REFERENCE)
5.1 General
This procedure describes the calibration procedure for the PM1703M, PM1703MA, PM1703GN,
PM1703GNA detectors. The calibration tests shall be performed by qualified calibration facilities. The
detectors shall be calibrated during manufacture, after repair and periodically during operation and storage
as required by national regulations.
5.2 For operations and measuring instruments refer to the Table below:
Operation
Paragraph
Reference and auxiliary measuring instruments
External
5.6.1
examination
Check-up
5.6.2
Testing of
5.6.3.1
Dosimetric calibration assembly with a reference
metrological
source 137Cs. Certified uncertainty of the assembly
characteristics
not more than 7 % with 0.95 confidence probability
5.6.3.2
Calibration assembly with a set of reference neutron
sources Pu--Be. Certified uncertainty of the
assembly not more than 7 % with 0.95 confidence
probability
5.4
Barometer. Least division 1 kPa. Measurement range
from 60 to 120 kPa
5.4
Thermometer. Least division 0.1C. Measurement
range from 10 to 30C
5.4
Hygrometer. Measurement range from 30 to 90 %
5.6.3.1, 5.6.3.2 Stopwatch. Least division 0.1 second
5.4
Dosimeter. Intrinsic error 15 %.
5.3 Safety precautions
During the calibration procedure observe the existing national standards for handling radioactive
materials and other sources of ionizing radiation and radiation safety regulations, as well as on-site accident
prevention instructions.
5.4 Test conditions:
- ambient temperature: 20  5C;
- relative air humidity: 60 (+20;-30) %;
- atmospheric pressure: 101.3 (+5.4; -15.3)kPa;
- background gamma radiation: not more than 0.20Sv/h.
5.5 Preparation for calibration tests
Prior to calibration, study this Operating Manual and prepare the detector according to the
Operating Manual.
5.6 Calibration procedure
5.6.1 During the external examination check the detector against the following requirements:
- the detector delivery kit shall comply with the operating manual;
- the detector must be marked with clear inscriptions;
- the detector must be free from pollution and mechanical damages that may affect operation of the
detector.
23
5.6.2 During check-up it is necessary to check operation of the detector as described in the
operating manual.
5.6.3 Testing of metrological performance
.
5.6.3.1 Check the relative intrinsic error of ambient equivalent dose rate (DER) H *(10)
measurement as follows:
1) switch on the detector, switch off audible and vibration alarms. Before testing, set maximum
DER alarm thresholds;
2) place the detector on the calibration assembly with a reference gamma source 137Cs so that the
panel of the detector without clip faces the gamma radiation source and the normal through the detector
geometric center coincides with the radiation flux axis. The geometric center of the detector is marked with
dots on the detector’s label and “x” mark in the operation manual;
3) select the DER measurement mode;
4) in not less than 300 s after placing the detector on the calibration assembly take 5 readings of
DER measurement at intervals of not less than 60 s without radiation source and calculate the average DER
.
of background H b , µSv/h, by formula
1
,

H 
b
5
i 5


H
5
(1)
bi
where H bi – the i-the reading of the detector of DER value of background, µSv/h;
5) place the detector of the calibration assembly so that the detector geometric center coincides with
the check point where the reference DER = 3.0 µSv/h and irradiate the detector;
6) in not less than 180 s after the beginning of irradiation take 5 readings of DER measurement at
.
intervals of not less than 30 s and calculate the average DER H j by formula

Hj 
1 5 
 H ji ,
5 i 5
(2)

where H ji – the i-the DER reading of the detector at j-th check point;
7) repeat measurements for the check points where reference DER is equal to 30.0 and 70.0 µSv/h;
8) calculate relative error of measurement Qj, %, by formula

 
  
  H j  H b   H oj 

 


Qj  
  100 ,



H oj





where
H
oj
(3)
– reference DER at check point;

H – average DER value at check point;
j

H b – average background DER at check point, calculated by formula (1);
9) calculate confidence limits of relative intrinsic error of DER measurement , %, with 0.95
confidence probability, by formula
  1,1 Qo 2  Q j max 2 ,
(4)
where Qo − error (uncertainty) of the reference calibration dosimetric assembly, %;
Qjmax −maximum relative measurement error Qj, % calculated by formula (3).
10) compare the confidence limit of relative intrinsic error  calculated by formula (4) with the
limits of relative intrinsic error acc. =  30 %.
The detector passes the test if   acc. .
24
5.6.3.2 Test sensitivity of the detector to neutron radiation (fast neutrons) as follows:
1) place the detector at the center of PMMA phantom so that the detector’s side with clip faces the
phantom. Switch of the detector and select the search mode.
2) place the detector with phantom under test on a special movable carriage of the calibration so
that the effective center of neutron detector (indicated in the operation manual) is situated on the symmetric
axis of collimated neutron radiation with precision ± 5mm and the detector’s front side (without clip) is
directed to the neutron radiation source.
N o t e – When testing the detector the geometrical center of the neutron detector is considered to be
the effective center.
3) place the detector on the calibration assembly so that the geometrical center of the detector
coincides with the check point where the neutron flux density 0 has such value that the detector’s readings
are from 0.5 to 0.8 of the final value of count rate range and irradiate the detector;
4) in no less than 120 s after irradiation began take 5 readings of the detector at intervals of no less
than 60 s and calculate the average value Nm by formula
 N ,
N 
5
5
i
i 1
(5)
m
where Ni – the i-th reading of the count rate;
5) calculate the detector’s sensitivity 2, countcm2 by formula:
2 
Nm  В ,

(6)
i
where B – the coefficient considering the contribution of diffused neutron radiation
detector’s readings (determined when the equipment is certified);
0 – reference neutron flux density value, s-1·cm-2.
in the
The PM1703GN passes the test if its sensitivity to fast neutrons   0.035 countcm2.
The PM1703GNA passes the test if its sensitivity to fast neutrons   0.07 countcm2.
25
6 STORAGE AND SHIPPING
6.1 Storage
When stored in a storage area the detectors must be in the manufacturer packing without batteries at
ambient temperatures from minus15 to 50 С and humidity up to 95 % at 35 С. Storage duration should
not exceed average detector life time, 8 years.
When out of the packing, the detectors can be stored at ambient temperatures from 10 to 35 С and
humidity of up to 80 % at 25 С, without batteries.
The storage area must be clean of dust, acid and alkali vapors, aggressive gases and other agents
that may cause the appearance of rust.
6.2 Shipping
Packed and turned off detectors can be transported by any closed transport at ambient temperatures
from minus 50 to 50 оC.
Packed detectors must be firmly fixed during the transportation to avoid collisions with each other
and walls of the transport.
When transporting in the sea the detectors must be packet to a hermetic polyethylene case with a
silica gel dehumidifier.
When transported by plane the detectors must be placed to hermetic compartments.
26
7 LIMITED WARRANTY
Polimaster (“Polimaster”) warrants to the purchaser (the “Purchaser”) that the Product, including
component parts, to be free from material defects in material and workmanship, under normal use and
service for a period of one year (the “Warranty Period”) provided, however, that the foregoing warranties
are expressly contingent (and shall otherwise be void) upon use of the Products in accordance with
specifications and without misuse, abuse, or abnormal use, accident, damage, alteration, or modification
thereto or improper or unauthorized repairs or improper maintenance. Non-substantial variations of
performance from the documentation do not establish a warranty right.
Except for the foregoing express warranties stated herein, and for any warranty, condition,
representation or term to the extent to which the same cannot or may not be excluded or limited by law
applicable to purchaser in his/her/its jurisdiction, the products and services hereunder are provided “as is
and with all faults” and, to the maximum extent permitted by law, polimaster disclaims all other warranties,
of any kind, either express, or implied, including, without limitation, implied warranties of merchantability,
fitness for a particular purpose, integration, satisfactory quality, noninfringement or any warranties arising
from course of dealing or course of performance. Purchaser assumes all risks and responsibilities for
selection of the product to achieve his/her/its intended results, and for the installation of, use of, and results
obtained from the product. Polimaster does not warrant that the products and services hereunder will meet
purchaser's or users' requirements or will operate in the combinations which may be selected by purchaser
or user or that the services hereunder or the operation of the products will be secure, error-free, or
uninterrupted, and polimaster hereby disclaims any and all liability on account thereof to the maximum
extent permissible under applicable law. Polimaster disclaims any and all liability for the loss of data
during any communications and any liability arising from or related to any failure by polimaster to transmit
accurate or complete information to purchaser.
Exclusive remedy. Other than termination of this agreement due to polimaster's breach, as
purchaser’s exclusive remedy for any defect or nonconformity in the product, purchaser shall obtain from
polimaster repair or replacement of the products containing such defect or nonconformity (“affected
products”). In furtherance of such undertaking, if purchaser reasonably believes that any product contains
a defect or nonconformity for which polimaster is responsible, purchaser shall inform polimaster of the
nature of such defect or nonconformity in reasonable detail and shall request authorization from polimaster
to return the affected products to polimaster for repair or replacement. All products so returned shall be
shipped prepaid or otherwise delivered to polimaster's facility or authorized service center. If polimaster
fails to repair or replace the affected products within a reasonable time after purchaser has so returned them
to polimaster, purchaser shall be entitled to repayment or credit of the original price of the defective or
nonconforming product as its exclusive further remedy.
Exclusions of damages and liability. Purchaser assumes the entire cost of any damage resulting
from the use of the product and the information contained in, gathered or compiled by the product, and the
interaction (or failure to interact properly) with any other hardware or software whether provided by
polimaster or a third party. To the maximum extent permitted by applicable law, in no event will
polimaster or its suppliers or licensors be liable for any damages whatsoever (including, without limitation,
any special, incidental, consequential or indirect damages, damages for loss of business profits, business
interruption, loss of business information, loss of data, loss of goodwill, work stoppage, hardware or
software disruption, impairment or failure, repair costs, time value or other pecuniary loss) arising out of
the use or inability to use the product, or the incompatibility of the product with any other product,
hardware, software or usage, even if such parties have been advised of the possibility of such damages.
Limitation on Liability. Notwithstanding any provision to the contrary herein and with the
exception of the claims of intellectual property rights infringements and the payments obligations
hereunder, the liability of Polimaster for any claim whatsoever related to the Products or this Agreement,
including any cause of action sounding in contract, tort, or strict liability, shall not exceed the greater of
Ten Thousand ($10,000.00) Dollars or the total amount of payments theretofore paid by Purchaser during
the previous six month period to Polimaster in connection with the Products relating to such liability. This
limitation of liability shall not apply to liability for death or personal injury to the extent that applicable law
27
prohibits such limitation. Furthermore, because some jurisdictions do not allow the exclusion or limitation
of liability for consequential or incidental damages, the above limitation, if applicable, may not apply to
purchaser.
Applicability. The limitations and exclusions contained herein shall apply notwithstanding any
failure of essential purpose of any limited remedy.
28
ATTACHMENT А
(refrence)
Detector operation modes and functions chart
Personal Radiation detector РМ1703_____
#
Modes and functions
Enabled - (V)
Disabled - (-)
---------Value
Note
Search mode (gamma, indication “s1
”)
DER Measurement mode
(indication µSv/h)
Auto calibration
Search in measurement mode
The mode can be enabled autonomously or
together with modes 2
The mode can be enabled autonomously or
together with mode 1
5
Setting if the DER threshold for
modes 1-3
- Safety Alarm threshold
Range: 0,01-70 Sv/h
Recommended: 30 Sv/h
6
Set sound alarm volume
It is possible to change the level of audible
alarm in the setup mode
1
2
3
4
7
The mode can be enabled together with
modes 1 and 2
Additionally for GN detectors
Neutron registration mode:
Modes of impulse count accumulation
(neutrons, indication S-1) and average
count rate neutron registration
Additional settings
8
9
10
11
12
13
Data recording interval, min
Changing of coefficient n allowed
Coefficient n (gamma)
Coefficient n (neutron)
Audio alarm
Vibration alarm
Recommended 5.3
Recommended 5.0
29
ATTACHMENT B
(refrence)
Detector Typical Energy Response in Search Mode
550
450
350
250
150
50
-50
-150
%
keV
10
100
1000
10000
30