SIST EN IEC 62244:2021

SLOVENSKI STANDARD
01-april-2021
Nadomešča:
SIST EN 62244:2011
Instrumenti za zaščito pred sevanjem - Vgrajeni monitorji sevanja (RPM) za
odkrivanje nedovoljenega prometa z radioaktivnimi in jedrskimi snovmi (IEC
62244:2019)
Radiation protection instrumentation - Installed radiation portal monitors (RPMs) for the
detection of illicit trafficking of radioactive and nuclear materials (IEC 62244:2019)
Strahlenschutz-Messgeräte - Fest installierte Portalmonitore für den Nachweis des
unerlaubten Transports von radioaktiven Stoffen und spaltbarem Nuklearmaterial (IEC
62244:2019)
Instrumentation pour la radioprotection Moniteurs de rayonnement installés (RPMs)
pour la détection du trafic illicite des matières radioactives et nucléaires (IEC
62244:2019)
Ta slovenski standard je istoveten z: EN IEC 62244:2021
ICS:
13.280 Varstvo pred sevanjem Radiation protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62244

NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2021
ICS 13.280 Supersedes EN 62244:2011 and all of its amendments
and corrigenda (if any)
English Version
Radiation protection instrumentation - Installed radiation portal
monitors (RPMs) for the detection of illicit trafficking of
radioactive and nuclear materials
(IEC 62244:2019)
Instrumentation pour la radioprotection - Portiques de Strahlenschutz-Messgeräte - Fest installierte Portalmonitore
détection des rayonnements (RPM) installés pour la für den Nachweis des unerlaubten Transports von
détection du trafic illicite de matières radioactives et radioaktiven Stoffen und spaltbarem Nuklearmaterial
nucléaires (IEC 62244:2019)
(IEC 62244:2019)
This European Standard was approved by CENELEC on 2021-01-25. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62244:2021 E
European foreword
This document (EN IEC 62244:2021) consists of the text of IEC 62244:2019 prepared by SC 45B
"Radiation protection instrumentation" of IEC/TC 45 "Nuclear instrumentation".
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-01-25
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-01-25
document have to be withdrawn
This document supersedes EN 62244:2011 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 62244:2019 was approved by CENELEC as a European
Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-395 - International Electrotechnical Vocabulary - - -
Part 395: Nuclear instrumentation: Physical
phenomena, basic concepts, instruments,
systems, equipment and detectors
IEC 60068-2-5 - Environmental testing – Part 2-5: Tests – EN IEC 60068-2-5 -
Test S: Simulated solar radiation at ground
level and guidance for solar radiation
testing and weathering
IEC 60068-2-11 - Basic environmental testing procedures - EN 60068-2-11 -
Part 2-11: Tests - Test Ka: Salt mist
IEC 61187 - Electrical and electronic measuring EN 61187 -
equipment - Documentation
IEC 62706 - Radiation protection instrumentation - - -
Environmental, electromagnetic and
mechanical performance requirements
IEC 62755 - Radiation protection instrumentation - Data - -
format for radiation instruments used in the
detection of illicit trafficking of radioactive
materials
IEC 62244 ®
Edition 2.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Radiation protection instrumentation – Installed radiation portal monitors

(RPMs) for the detection of illicit trafficking of radioactive and nuclear materials

Instrumentation pour la radioprotection – Portiques de détection des

rayonnements (RPM) installés pour la détection du trafic illicite de matières

radioactives et nucléaires
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.280 ISBN 978-2-8322-6660-1

– 2 – IEC 62244:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions, abbreviated terms and symbols, quantities and units . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms and symbols . 10
3.3 Quantities and units . 10
4 General characteristics and requirements . 10
4.1 General . 10
4.1.1 Overview . 10
4.1.2 Pedestrian . 11
4.1.3 Road vehicles . 12
4.1.4 Rail vehicles (includes rail transported containers) . 12
4.1.5 Conveyor . 12
4.2 Configuration . 13
4.3 Indication features . 14
4.4 Speed control . 14
4.5 Communication interface. 14
4.5.1 Requirements . 14
4.5.2 Method of test. 15
4.6 Data . 15
4.6.1 Requirements . 15
4.6.2 Method of test. 15
5 General test procedures . 15
5.1 Statistical fluctuations . 15
5.2 Standard test conditions . 16
5.3 Functionality test . 16
5.3.1 General . 16
5.3.2 Pre-test measurements . 16
5.3.3 Intermediate (during test) measurements . 17
5.3.4 Post-test measurements . 17
5.4 Reference radiation . 17
5.4.1 Gamma . 17
5.4.2 Neutron . 17
6 Radiation detection requirements . 18
6.1 False alarms . 18
6.1.1 Requirements . 18
6.1.2 Method of test. 18
6.2 Background effects . 18
6.2.1 Requirements . 18
6.2.2 Method of test. 18
6.3 Gamma radiation detection . 19
6.3.1 Requirements . 19
6.3.2 Method of test. 19
6.4 Neutron radiation detection, if provided . 19

IEC 62244:2019 © IEC 2019 – 3 –
6.4.1 Requirements . 19
6.4.2 Method of test. 19
6.5 Detection of neutron radiation in a high gamma field . 19
6.5.1 Requirements . 19
6.5.2 Method of test. 19
6.6 Over-range indication . 20
6.6.1 Requirements . 20
6.6.2 Method of test. 20
7 Climatic requirements . 20
7.1 General . 20
7.2 Ambient temperature. 20
7.2.1 Requirements . 20
7.2.2 Method of test. 20
7.3 Relative humidity . 21
7.3.1 Requirements . 21
7.3.2 Method of test. 21
7.4 Dust and moisture protection . 21
7.4.1 Requirements . 21
7.4.2 Method of test – dust . 21
7.4.3 Method of test – moisture . 22
7.5 Climatic exposure type test . 22
7.5.1 Requirements . 22
7.5.2 Method of test. 22
8 Mechanical requirements . 22
8.1 Vibration . 22
8.1.1 Requirements . 22
8.1.2 Method of test. 22
8.2 Impact (microphonic) . 23
8.2.1 Requirements . 23
8.2.2 Method of test. 23
9 Electric and electromagnetic requirements . 23
9.1 Electrostatic Discharge (ESD) . 23
9.1.1 Requirements . 23
9.1.2 Method of test. 23
9.2 Radio Frequency (RF) . 23
9.2.1 Requirements . 23
9.2.2 Method of test. 23
9.3 Radiated RF emissions . 24
9.3.1 Requirements . 24
9.3.2 Method of test. 24
9.4 Conducted disturbances. 24
9.4.1 Requirements . 24
9.4.2 Method of test. 24
9.5 Surges and oscillatory waves . 24
9.5.1 Requirements . 24
9.5.2 Method of test. 24
9.6 Line voltage and frequency fluctuations . 25
9.6.1 Requirements . 25
9.6.2 Method of test. 25

– 4 – IEC 62244:2019 © IEC 2019
10 Documentation . 25
10.1 Operation and maintenance manual . 25
10.2 Test certificate . 25
10.3 Declaration of conformity . 26

Figure 1 – Example of a two-sided system . 11

Table 1 – Standards for instrumentation used to detect illicit trafficking of radioactive
and nuclear materials . 7
Table 2 – Speed of moving sources . 12
Table 3 – Evaluation distances for different applications . 13
Table 4 – Standard test conditions . 16
Table 5 – Test result analysis . 17
Table 6 – Summary of performance requirements (informative) . 26
Table 7 – Environmental requirements (informative) . 27

IEC 62244:2019 © IEC 2019 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RADIATION PROTECTION INSTRUMENTATION –
INSTALLED RADIATION PORTAL MONITORS (RPMS) FOR
THE DETECTION OF ILLICIT TRAFFICKING OF RADIOACTIVE
AND NUCLEAR MATERIALS
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62244 has been prepared by subcommittee 45B: Radiation
protection instrumentation, of IEC technical committee 45: Nuclear instrumentation.
This second edition cancels and replaces the first edition issued in 2006. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) making the standard consistent with the new standards for detection of illicit trafficking of
radioactive material (see the Introduction);
b) creating unformed functionality test for all environmental, electromagnetic and mechanical
tests and a requirement for the coefficient of variation of each nominal mean reading;
c) reference to IEC 62706 for the environmental, electromagnetic and mechanical test
conditions;
– 6 – IEC 62244:2019 © IEC 2019
d) adding information regarding climatic exposures.
The text of this International Standard is based on the following documents:
FDIS Report on voting
45B/929/FDIS 45B/930/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IEC 62244:2019 © IEC 2019 – 7 –
INTRODUCTION
Illicit and inadvertent movement of radioactive materials has become a problem of increasing
importance. Radioactive sources out of regulatory control, so-called “orphan sources”, have
frequently caused serious radiation exposures and widespread contamination. Although illicit
trafficking of nuclear and other radioactive materials is not a new phenomenon, concern about
a nuclear “black market” has increased in the last few years particularly in view of its terrorist
potential.
In response to the technical policy of the International Atomic Energy Agency (IAEA), the
World Customs Organization (WCO) and the International Criminal Police Organization
(Interpol) related to the detection and identification of special nuclear materials and security
trends, nuclear instrumentation companies are developing and manufacturing radiation
instrumentation to assist in the detection of illicit movement of radioactive and special nuclear
materials. This type of instrumentation is widely used for security purposes at nuclear
facilities, border control checkpoints, and international seaports and airports.
However, to ensure that measurement results made at different locations are consistent it is
imperative that radiation instrumentation be designed to rigorous specifications based upon
agreed performance requirements stated in international standards. Several IEC standards
have been developed to address body-worn, hand-held and portal instruments, see Table 1.
Table 1 – Standards for instrumentation used to detect illicit
trafficking of radioactive and nuclear materials
Type of IEC
Title of the standard
instrumentation number
Radiation protection instrumentation – Alarming Personal Radiation Devices
(PRDs) for the detection of illicit trafficking of radioactive material
Radiation protection instrumentation – Spectroscopy-Based Alarming Personal
Body-worn 62618 Radiation Detectors (SPRD) for the detection of illicit trafficking of radioactive
material
Radiation protection instrumentation – Backpack-type radiation detector (BRD) for
the detection of illicit trafficking of radioactive material
Radiation protection instrumentation – Hand-held instruments for the detection and
62327 identification of radionuclides and for the estimation of ambient dose equivalent
rate from photon radiation
Portable or hand-
Radiation protection instrumentation – Highly sensitive hand-held instruments for
held 62533
photon detection of radioactive material
Radiation protection instrumentation – Highly sensitive hand-held instruments for
neutron detection of radioactive material
Radiation protection instrumentation – Installed radiation portal monitors (RPMs)
for the detection of illicit trafficking of radioactive and nuclear materials
Portal
Radiation protection instrumentation – Spectroscopy-based portal monitors used
for the detection and identification of illicit trafficking of radioactive material
Radiation protection instrumentation – Data format for radiation instruments used
Data format 62755
in the detection of illicit trafficking of radioactive materials

– 8 – IEC 62244:2019 © IEC 2019
RADIATION PROTECTION INSTRUMENTATION –
INSTALLED RADIATION PORTAL MONITORS (RPMS) FOR
THE DETECTION OF ILLICIT TRAFFICKING OF RADIOACTIVE
AND NUCLEAR MATERIALS
1 Scope
This document defines the performance requirements of installed monitors used for the
detection of gamma and neutron radiation emitters. These monitors are commonly known as
radiation portal monitors or RPMs. They are used to monitor vehicles, cargo containers,
people, or packages and are typically located at national and international border crossings.
They may be used at any location where there is a need for this type of monitoring.
This document establishes the general, radiological, climatic, mechanical, electric and
electromagnetic, and documentation requirements and associated test methods. A summary
of the performance requirements is provided as Table 6. An informative listing of
environmental requirements from IEC 62706 is provided as Table 7.
This document does not apply to the performance of spectroscopy-based portal monitors
covered in IEC 62484.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60050-395, International Electrotechnical Vocabulary – Part 395: Nuclear instrumentation:
Physical phenomena, basic concepts, instruments, systems, equipment and detectors
IEC 60068-2-5, Environmental testing – Part 2-5: Tests – Test S: Simulated solar radiation at
ground level and guidance for solar radiation testing and weathering
IEC 60068-2-11, Basic environmental testing procedures – Part 2-11: Tests – Test Ka: Salt
mist
IEC 61187, Electrical and electronic equipment – Documentation
IEC 62706, Radiation protection instrumentation – Environmental, electromagnetic and
mechanical performance requirements
IEC 62755, Radiation protection instrumentation – Data format for radiation instruments used
in the detection of illicit trafficking of radioactive materials
3 Terms and definitions, abbreviated terms and symbols, quantities and units
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions, as well as those given
in IEC 60050-395 apply.
IEC 62244:2019 © IEC 2019 – 9 –
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
coefficient of variation
COV
statistical measure of the dispersion of data points in a data series around the mean of those
data points
s
COV % = ×100
x
Where:
s is the standard deviation;
x
is the mean.
3.1.2
detection assembly
component of the RPM that contains the detectors and associated electronic devices
3.1.3
detection zone
location from which radiation emitted by an object or person being monitored may be detected
by the detection assembly(ies)
Note 1 to entry: For two sided RPMs, the detection zone is located between detection assemblies; for single-
sided RPMs, the detection zone is adjacent to the front face of the detection assembly.
3.1.4
nuclear material
plutonium except that with isotopic concentration exceeding 80 % in plutonium-238;
uranium-233; uranium enriched in the isotope 235 or 233; uranium containing the mixture of
isotopes as occurring in nature other than in the form of ore or ore-residue; any material
containing one or more of the foregoing
[SOURCE: IAEA-TECDOC-1311, September 2002]
3.1.5
occupancy
when an object such as a person, vehicle, package, or container is in the detection zone
3.1.6
reference point
physical mark on a piece of equipment or assembly to be used in order to position a source at
a point where the conventionally true value of the quantity to be measured is known
Note 1 to entry: For this document, the physical mark can be used to identify where a source is positioned.
Note 2 to entry: Two different physical marks could be used to identify positions for neutron and gamma radiation.
3.1.7
type test
conformity test of one or more items representative of the production

– 10 – IEC 62244:2019 © IEC 2019
3.2 Abbreviated terms and symbols
COV coefficient of variation
ESD electrostatic discharge
DU depleted uranium
HDPE high density polyethylene
IP international protection marking – degrees of protection provided by enclosures
NORM naturally occurring radioactive material
PVT polyvinyl toluene
RF radio frequency
RH relative humidity
RPM radiation portal monitor
3.3 Quantities and units
In the present document, units of the International System (SI) are used . The definitions of
radiation quantities are given in IEC 60050-395.
The following units may also be used:
-19
• for energy: electron-volt (symbol: eV), 1 eV = 1,602 x 10 J;
• for time: years (symbol: y), days (symbol: d), hours (symbol: h), minutes (symbol: min);
Multiples and submultiples of SI units will be used, when practicable, according to the SI
system.
4 General characteristics and requirements
4.1 General
4.1.1 Overview
RPMs are designed to detect radiation from gamma and/or neutron emitters transported by
vehicle, carried by a person, or concealed in a cargo container or in a package moved by a
conveyor belt.
RPMs issue a visual and/or audible alarm when the measured gamma or neutron radiation
level exceeds an alarm threshold. Measurement occurs when an object passes through the
detection zone.
According to their use, RPMs are classified as:
– pedestrian,
– road vehicle,
__________
th
International Bureau of Weights and Measures: The International System of Units, 8 edition, 2006.

IEC 62244:2019 © IEC 2019 – 11 –
– rail vehicle,
– conveyor.
If an RPM is designed for use in two or more classifications, its associated detection zone
shall be appropriate for each classification. Figure 1 shows an example of the detection zone
dimensions for an RPM that uses two detection assemblies.

Key
1 Detection zone
2 Detection assembly
3 Ground surface
W Width of detection zone
H Height of detection zone
D Depth of detection zone
T Top
M Middle
B Bottom
source movement
Figure 1 – Example of a two-sided system
Some RPMs may have the ability to reduce alarms caused by NORM using for example,
energy-based discrimination analysis. Such analysis provides a categorisation of the radiation
source. Performance requirements are established by agreement between the manufacturer
and the user.
The source movement speed and evaluation test distance for each monitor type in 4.1.2
through 4.1.4 are described in Table 2 and Table 3, respectively.
4.1.2 Pedestrian
Pedestrian RPMs shall provide a detection zone to ensure that people are monitored.
Pedestrian RPMs may use a single detection assembly (single-sided) or multiple directly
opposing detection assemblies (two-sided).

– 12 – IEC 62244:2019 © IEC 2019
4.1.3 Road vehicles
Large road vehicle RPMs monitor vehicles that are typically more than 2,5 m high. Small road
vehicle RPMs monitor vehicles that are typically less than or equal to 2,5 m high. Road
vehicle RPMs shall be two-sided.
4.1.4 Rail vehicles (includes rail transported containers)
Rail vehicle RPMs shall be two-sided. Rail vehicle RPMs should have the ability to identify the
individual car that caused an alarm to occur while monitoring an entire multi-car train.
4.1.5 Conveyor
Conveyor RPMs shall provide a detection zone to ensure that items moving through the
detection zone are monitored. They may use a single detection assembly or multiple detection
assemblies with detectors across the top, bottom, and/or side(s) of the detection zone. The
detection zone is located adjacent to a detection assembly for single detector conveyor RPMs.
For multiple detectors conveyor RPMs, the detection zone is located between the detection
assemblies.
Table 2 – Speed of moving sources
Monitor type Source speed, m/s
Pedestrian 1,2 ± 0,12
Small vehicle 2,2 ± 0,22
Large road vehicle and rail 1,2 ± 0,12
Package or conveyor 1,0 ± 0,1
IEC 62244:2019 © IEC 2019 – 13 –
Table 3 – Evaluation distances for different applications
Detection Detection Detection
Distance
zone bottom zone middle zone top
between
from the from the from the
Monitor type detection Evaluation distance
ground or ground or ground or
assemblies for
floor floor floor
testing
surface surface surface
2 m or less
Single-sided
Source (1,0 ± 0,02) m from in case of
pedestrian N/A 0,05 m 1 m
detector height
monitors
restriction
(1,0 ± 0,02) m
apart measured
from the surface 2 m or less
Multiple-sided
of each Centred between detection in case of
pedestrian 0,05 m 1 m
detection assemblies height
monitors
assembly, or as restriction
stated by the
manufacturer
(3,0 ± 0,1) m
apart measured
from the surface
Small vehicle of each Centred between detection
0,2 m 1,25 m 2,5 m
monitors detection assemblies
assembly, or as
stated by the
manufacturer
(5,0 ± 0,1) m
apart measured
from the surface
Large road
of each Centred between detection
vehicle 0,2 m 2,25 m 4,5 m
detection assemblies
monitors
assembly, or as
stated by the
manufacturer
(6,0 ± 0,1) m
apart measured
from the surface
Multiple-sided
of each Centred between detection
rail vehicle 1 m 3 m 6 m
detection assemblies
monitors
assembly, or as
stated by the
manufacturer
Single-sided
As stated by As stated by As stated by
package (or As stated by the Centred between detection
the the the
conveyor) manufacturer assemblies
manufacturer manufacturer manufacturer
monitor
Double-sided
As stated by As stated by As stated by
package (or Source (1,0 ± 0,02) m from
N/A the the the
conveyor) detector
manufacturer manufacturer manufacturer
monitor
4.2 Configuration
An RPM may be designed as one or several detection assemblies that are contiguous to a
system controller or placed at a distance from it. A detection assembly may consist of a single
detector or multiple detectors contained within a protective enclosure. An RPM may consist of
a single detection assembly or multiple detection assemblies depending on the classification.
The detection assemblies shall be designed to operate under all weather conditions expected
at the installation location including conditions such as temperature, humidity, rain, lightning,
wind, sunlight, mould and vegetation growth (flora), and invasive insects or rodents (fauna).
Enclosure(s) provided for assemblies intended for outdoor use should be designed to not
deteriorate during prolonged use under these conditions. Enclosure vents may be used on the
detection assemblies to allow air flow. If used, the venting techniques should not allow

– 14 – IEC 62244:2019 © IEC 2019
penetration of moisture, dust, or invasive insects as established by the IP requirement or
expected conditions at the location of use.
NOTE Observations have been made regarding the effects of long-term climatic exposure to moisture. A
suggested type test is included in Clause 7 for guidance only.
The detection assemblies for road and rail vehicle monitoring may be subjected to vibration
due to the heavy vehicles being monitored. Mounting techniques (i.e., concrete pads) that are
not addressed by this document shall be designed to minimize the transfer of vibration and
shock conditions to the detection system.
Controls and adjustments which affect calibration and alarm settings shall be designed to
ensure access to them is limited to authorised persons.
Provisions shall be made to permit testing of visual and/or audible warning indicators without
the use of radiation sources.
The RPM shall have the ability to display operational status including, for example, loss of
power, low count rate, high count rate, unstable count rate, or other electronic failures for
each detector.
4.3 Indication features
RPMs shall have the capability to store and display time history data including background
count rates both prior to and after a measurement, and alarm information. Data storage and
display capabilities may be accomplished, for example, by providing outputs for computers, or
be internal to the measurement assembly.
RPMs shall be capable of providing a local (close to the detection assembly(ies) indication
and alarm signal, and of providing these signals to remote stations, e.g., computer or
processing and display unit. RPMs shall be unaffected by, and completely independent of any
operational mode or malfunction of the remote station. It also shall be possible to disable
visual and audible indications located at the detection assembly(ies) through controlled
access. The colour scheme for visual indicators should be by agreement between the
manufacturer and the purchaser.
4.4 Speed control
The performance of the RPM is dependent on the speed at which the object being monitored
passes through the detection zone. Therefore RPMs except for pedestrian and conveyor
RPMs, should include a device for measuring the speed of the object passing through the
detection zone. An excessive speed alarm shall be provided. The speed alarm set point shall
be adjustable up to a user-defined maximum speed setting. The manufacturer shall indicate
the passage speed at which the detection levels provided in the RPM’s specifications were
obtained.
4.5 Communication interface
4.5.1 Requirements
RPMs shall have the ability to transfer data to an external device, such as a computer. The
transfer interface shall be fully described in the manual and should use a communications port
that meets the requirements of Ethernet, USB, wireless, or other means such as a removable
media device. Consideration should be given to data security when transferring data. The
naming convention used for each file shall be defined in the manual.

IEC 62244:2019 © IEC 2019 – 15 –
4.5.2 Method of test
Following the RPM’s manual, perform a measurement trial (6.3 or 6.4) and transfer the result
to verify the RPM can transfer data to an external device and that the transfer interface is
described including the naming convention used for each data package.
4.6 Data
4.6.1 Requirements
Each data package produced shall be in the format as specified by IEC 62755 and shall
contain the following information as a minimum:
– Time and date
– Occupancy duration
– Integration time
– RPM identification (i.e., manufacturer name, model, serial number, software version)
– Gamma detector kind (e.g., PVT)
– Gamma alarm condition
– Background gamma count rate
– Gamma count r
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