SIST EN 60846-2:2018

Radiation protection instrumentation - Ambient and/or directional dose equivalent (rate) meters and/or monitors for beta, X and gamma radiation - Part 2: High range beta and photon dose and dose rate portable instruments for emergency radiation protection purposes (IEC 60846-2:2015)

This part of IEC 60846 applies to portable or transportable dose equivalent (rate) meters
and/or monitors for the measurement of ambient and/or directional dose equivalent (rate) from
external beta, X and gamma radiation for energies up to 10 MeV during emergency situations.
The object of this International Standard is to specify the design requirements and the
performance characteristics of dose equivalent (rate) meters intended for the determination of
ambient and/or directional dose equivalent (rate) as defined in ICRU Report 47 under
emergency conditions. With the exception of modified or new clauses listed below, all clauses
in IEC 60846-1:2009 are applicable for instruments used for emergency purposes.
This International Standard does not specify which instruments are required nor does it
consider the numbers or specific locations of such instruments. This International Standard
does not identify instrumentation for specific types of accidents. It is essential that the rated
ranges of the instruments and the radiological and non-radiological conditions for which the
instruments are designed adequately cover the accident and post-accident conditions as
determined by accident analysis and/or specified by appropriate regulatory authorities or
qualified individuals. It is expected that accidents will involve both dose equivalent (rate) and
environmental extremes (e.g. temperature and humidity). Specifications for instruments for
measuring dose equivalent rates less than the minimum detectable dose rate level specified
in this International Standard are contained in IEC 60846-1:2009. Where such instruments are
also used for emergency measurements, the requirements of this International Standard
apply.
Although this International Standard specifies the requirements for instruments primarily for
emergency use, such instruments may also be used for on-site measurements at other times.
If the instrument has a remote detector and if an additional detector is provided in the
measuring assembly to measure dose equivalent rate at the location of the operator, the
requirements apply to both of the detectors.

Strahlenschutz-Messgeräte - Umgebungs- und Richtungs-Äquivalentdosis(leistungs)-Messgeräte und/oder Monitore für Beta-, Röntgen- und Gammastrahlung - Teil 2: Tragbare Messgeräte mit erweiterten Messbereichen zur Notfall-Strahlenschutzdosimetrie für Beta- und Photonendosis und -dosisleistung (IEC 60846-2:2015)

Instrumentation pour la radioprotection - Instruments pour la mesure et/ou la surveillance de l'équivalent de dose (ou du débit d'équivalent de dose) ambiant et/ou directionnel pour les rayonnements bêta, X et gamma - Partie 2: Instruments portables de grande étendue, pour la mesure de la dose et du débit de dose des rayonnements photoniques et bêta dans des situations d'urgence de radioprotection (IEC 60846-2:2015)

L'IEC 60846-2:2015 est applicable aux instruments portables ou transportables de mesure et/ou de surveillance de l'équivalent de dose (ou du débit d'équivalent de dose) ambiant et/ou directionnel pour les rayonnements externes bêta, X et gamma d'énergie jusqu'à 10 MeV, dans des situations d'urgence. L'objet de la présente Norme internationale est de spécifier les exigences de conception et les caractéristiques d'aptitude à la fonction des instruments de mesure d'équivalent de dose (ou du débit d'équivalent de dose) destinés à la détermination de l'équivalent de dose (ou du débit d'équivalent de dose) ambiant et/ou directionnel tel que défini dans le rapport ICRU 47, pour les situations d'urgence. La modification technique majeure par rapport à l'édition précédente consiste en une mise à jour prenant en compte l'édition révisée de l'IEC 60846-1:2009.
Cette publication doit être lue conjointement avec la IEC 60846-1:2009.

Instrumenti za zaščito pred sevanjem - Merilniki ekvivalentne doze v prostoru in/ali usmerjene ekvivalentne doze in/ali monitorji sevanja beta, rentgenskega sevanja in sevanja gama - 2. del: Prenosni merilni instrumenti z razširjenimi merilnimi območji za dozimetrijo v sili za odmerjanje beta in fotona ter hitrost odmerka (IEC 60846-2:2015)

Ta del standarda IEC 60846 se uporablja za prenosne in premične merilnike in/ali monitorje ekvivalentne doze za merjenje ekvivalentne doze v prostoru in/ali usmerjene ekvivalentne doze sevanja beta, rentgenskega sevanja in sevanja gama za energije do 10 MeV v sili.
Namen tega mednarodnega standarda je določiti zahteve za načrtovanje in lastnosti delovanja merilnikov ekvivalentne doze, ki so namenjeni za določevanje ekvivalentne doze v prostoru in/ali usmerjene ekvivalentne doze, kot je opredeljena v poročilu 47 ICRU, v sili. Z izjemo spodaj navedenih spremenjenih ali novih točk, se vse točke iz standarda IEC 60846-1:2009 uporabljajo za instrumente, ki se uporabljajo v sili.
Ta mednarodni standard ne določa, kateri instrumenti so zahtevani, niti ne določa števila mest, ki so namenjena posebej za te instrumente. Ta mednarodni standard ne določa instrumentov za določene vrste nesreč. Ključnega pomena je, da merilna območja instrumentov ter radiološki in neradiološki pogoji, za katere so instrumenti zasnovani, ustrezno zajemajo pogoje med nesrečo in po njej, kot določa analiza nesreče in/ali ustrezni regulativni organi ali usposobljene osebe. Pričakuje se, da bodo nesreče vključevale ekstreme ekvivalentne doze in okoljske ekstreme (npr. temperatura in vlaga). Specifikacije za instrumente za merjenje ekvivalentnih doz, manjših od najmanjše ravni doze, ki jo je mogoče zaznati in ki je navedena v tem mednarodnem standardu, so zajete v standardu IEC 60846-1:2009. Če se ti instrumenti uporabljajo tudi za meritve v sili, se zanje uporabljajo zahteve iz tega mednarodnega standarda.
Čeprav ta mednarodni dokument določa zahteve za instrumente, ki so primarno namenjeni za uporabo v sili, se lahko ti instrumenti uporabljajo tudi za splošno opravljanje meritev na mestu uporabe. Če je instrument opremljen z daljinskim detektorjem in če je tudi merilni sestav opremljen z detektorjem za merjenje ekvivalentne doze v okolici upravljavca, se zahteve uporabljajo za oba detektorja.

General Information

• Status: Published
• Public Enquiry End Date: 30-Sep-2017
• Publication Date: 23-Apr-2018
• ICS: 13.280 - Radiation protection
• Technical Committee: I09 - Imaginarni 09
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-Apr-2018
• Due Date: 24-Jun-2018
• Completion Date: 24-Apr-2018
• Ref Project: EN 60846-2:2018 - Radiation protection instrumentation - Ambient and/or directional dose equivalent (rate) meters and/or monitors for beta, X and gamma radiation - Part 2: High range beta and photon dose and dose rate portable instruments for emergency radiation protection purposes

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60846-2:2018
01-junij-2018
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XVPHUMHQHHNYLYDOHQWQHGR]HLQDOLPRQLWRUMLVHYDQMDEHWDUHQWJHQVNHJDVHYDQMDLQ
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REPRþML]DGR]LPHWULMRYVLOL]DRGPHUMDQMHEHWDLQIRWRQDWHUKLWURVWRGPHUND,(&

Radiation protection instrumentation - Ambient and/or directional dose equivalent (rate)
meters and/or monitors for beta, X and gamma radiation - Part 2: High range beta and
photon dose and dose rate portable instruments for emergency radiation protection
purposes (IEC 60846-2:2015)
Strahlenschutz-Messgeräte - Umgebungs- und Richtungs-Äquivalentdosis(leistungs)-
Messgeräte und/oder Monitore für Beta-, Röntgen- und Gammastrahlung - Teil 2:
Tragbare Messgeräte mit erweiterten Messbereichen zur Notfall-
Strahlenschutzdosimetrie für Beta- und Photonendosis und -dosisleistung (IEC 60846-
2:2015)
Instrumentation pour la radioprotection - Instruments pour la mesure et/ou la surveillance
de l'équivalent de dose (ou du débit d'équivalent de dose) ambiant et/ou directionnel
pour les rayonnements bêta, X et gamma - Partie 2: Instruments portables de grande
étendue, pour la mesure de la dose et du débit de dose des rayonnements photoniques
et bêta dans des situations d'urgence de radioprotection (IEC 60846-2:2015)
Ta slovenski standard je istoveten z: EN 60846-2:2018
ICS:
13.280 Varstvo pred sevanjem Radiation protection
SIST EN 60846-2:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60846-2:2018

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SIST EN 60846-2:2018

EUROPEAN STANDARD EN 60846-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
April 2018
ICS 13.280
English Version
Radiation protection instrumentation - Ambient and/or directional
dose equivalent (rate) meters and/or monitors for beta, X and
gamma radiation - Part 2: High range beta and photon dose and
dose rate portable instruments for emergency radiation
protection purposes
(IEC 60846-2:2015 , modified)
Instrumentation pour la radioprotection - Instruments pour la Strahlenschutz-Messgeräte - Umgebungs- und Richtungs-
mesure et/ou la surveillance de l'équivalent de dose (ou du Äquivalentdosis(leistungs)-Messgeräte und/oder Monitore
débit d'équivalent de dose) ambiant et/ou directionnel pour für Beta-, Röntgen- und Gammastrahlung - Teil 2: Tragbare
les rayonnements bêta, X et gamma - Partie 2: Instruments Messgeräte mit erweiterten Messbereichen zur Notfall-
portables de grande étendue, pour la mesure de la dose et Strahlenschutzdosimetrie für Beta- und Photonendosis und
du débit de dose des rayonnements photoniques et bêta -dosisleistung
dans des situations d'urgence de radioprotection (IEC 60846-2:2015 , modifiziert)
(IEC 60846-2:2015 , modifiée)
This European Standard was approved by CENELEC on 2017-11-13. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 60846-2:2018 E

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SIST EN 60846-2:2018
EN 60846-2:2018
European foreword
This document (EN 60846-2:2018) consists of the text of IEC 60846-2:2015 prepared by SC 45B
"Radiation protection instrumentation" of IEC/TC 45 "Nuclear instrumentation", together with the
common modifications prepared by CLC/TC 45B "Radiation protection instrumentation".
The following dates are fixed:
• latest date by which this document has to be implemented (dop) 2018-10-13
at national level by publication of an identical national
standard or by endorsement
• latest date by which the national standards conflicting with (dow) 2021-04-13
this document have to be withdrawn
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.
2

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SIST EN 60846-2:2018
EN 60846-2:2018
Endorsement notice
The text of the International Standard IEC 60846-2:2015 was approved by CENELEC as a
European Standard with agreed common modifications.
COMMON MODIFICATIONS
All over the document
Replace all references to “IEC 60846-1:2009” with references to “EN 60846-1:2014”.
Replace all references to “IEC 60846-1” with references to “EN 60846-1”.
Modification to 8.4.3
Replace 8 times “1,5 MeV” with “1,33 MeV”.
Modification to Table 5
Replace 2 times “1,5 MeV” with “1,33 MeV”.
Modification to Table 6
Replace 3 times “1,5 MeV” with “1,33 MeV”.
Annexes
Add the following new Annex ZA:
3

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SIST EN 60846-2:2018
EN 60846-2:2018
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 When 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.
Annex ZA of EN 60846-1:2014 applies except as follows:
Add
Publication Year Title EN/HD Year
IEC 60325 (mod.) 2002 Radiation protection instrumentation - EN 60325 2004
Alpha, beta and alpha/beta (beta energy
> 60 keV) contamination meters and
monitors
IEC 60846-1 (mod.) 2009 Radiation protection instrumentation - EN 60846-1 2014
Ambient and/or directional dose
equivalent (rate) meters and/or monitors
for beta, X and gamma radiation –
Part 1: Portable workplace and
environmental meters and monitors

4

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SIST EN 60846-2:2018



IEC 60846-2

®


Edition 2.0 2015-12




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Radiation protection instrumentation – Ambient and/or directional dose

equivalent (rate) meters and/or monitors for beta, X and gamma radiation –

Part 2: High range beta and photon dose and dose rate portable instruments for


emergency radiation protection purposes



Instrumentation pour la radioprotection – Instruments pour la mesure et/ou la


surveillance de l’équivalent de dose (ou du débit d’équivalent de dose) ambiant

et/ou directionnel pour les rayonnements bêta, X et gamma –

Partie 2: Instruments portables de grande étendue, pour la mesure de la dose et

du débit de dose des rayonnements photoniques et bêta dans des situations

d’urgence de radioprotection









INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 13.280 ISBN 978-2-8322-3076-3



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60846-2:2018
– 2 – IEC 60846-2:2015 © IEC 2015
CONTENTS
FOREWORD . 4
1 Scope and object . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Units and list of symbols . 7
5 General characteristics of ambient dose equivalent (rate) meters for emergency
purposes . 7
5.2 Read-out . 7
5.3 Dose equivalent and dose equivalent rate range . 7
5.5 Minimum range of measurement . 7
5.15 Portability . 7
5.16 Protection of switches . 8
5.17 Use of extension probe . 8
5.18 Contamination probe . 8
6 General test procedures . 8
7 Additivity of indicated value . 8
8 Radiation performance requirements and tests . 8
8.4 Variation of the response due to photon radiation energy and angle of
incidence . 8
 
8.4.3 Measuring quantity H'(0,07), H'(0,07), H*(10) or H*(10) for telescopic
or remote cylindrical probes . 8
8.5 Variation of the response due to beta radiation energy and angle of
incidence . 10

8.5.1 Measuring quantity H'(0,07) or H ′(0,07) . 10
8.7 Linearity and statistical fluctuations. 10
8.7.2 Requirements . 10
8.14 Extracameral response . 10
8.14.1 Requirements . 10
8.14.2 Method of test. 10
8.15 Response of instrument with extended probe . 10
8.15.1 Requirements . 10
8.15.2 Method of test. 11
9 Electrical characteristics of directional and ambient dose equivalent (rate) meters . 11
9.2 Warm-up time . 11
9.2.1 Requirements . 11
9.2.2 Test method . 11
9.2.3 Interpretation of the results . 11
10 Mechanical characteristics of directional and ambient dose equivalent (rate)
meters . 11
10.4 Drop test . 11
10.4.1 Requirements . 11
10.4.2 Method of test. 12
10.4.3 Interpretation of the results . 12
11 Environmental characteristics, performance requirements and tests . 12
11.2 Ambient temperature. 12
11.2.1 Requirements . 12

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SIST EN 60846-2:2018
IEC 60846-2:2015 © IEC 2015 – 3 –
11.2.2 Test method . 12
11.2.3 Interpretation of the results . 13
11.3 Relative humidity . 13
11.3.1 Requirements . 13
11.8 Temperature shock . 13
11.8.1 Requirements . 13
11.8.2 Method of test. 13
11.8.3 Interpretation of the results . 14
12 Software . 14
13 Summary of characteristics . 14
14 Documentation . 14

Table 5 – Radiation characteristics of directional dose equivalent (rate) meters . 15
Table 6 – Radiation characteristics of ambient dose equivalent (rate) meters . 16
Table 7 – Electrical, mechanical and environmental characteristics of directional and
ambient dose equivalent (rate) meters . 17

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SIST EN 60846-2:2018
– 4 – IEC 60846-2:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

RADIATION PROTECTION INSTRUMENTATION –
AMBIENT AND/OR DIRECTIONAL DOSE EQUIVALENT (RATE)
METERS AND/OR MONITORS FOR BETA, X AND GAMMA RADIATION –

Part 2: High range beta and photon dose and dose rate portable
instruments for emergency radiation protection purposes

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 60846-2 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 of IEC 60846-2, issued in 2007, as
well as IEC 61018, issued in 1991; it constitutes a technical revision.
The main technical change with regard to the previous edition consists of an update to the
revised edition of IEC 60846-1:2009.
This International Standard IEC 60846-2 is to be used in conjunction with IEC 60846-1:2009.
For the purposes of this standard, clauses/subclauses of IEC 60846-1:2009 apply, without
modifications, except when stated. The modified clauses/subclauses are identified by the
same number as in IEC 60846-1:2009 or, for new clauses/subclauses, by a higher number not
used in IEC 60846-1:2009.

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SIST EN 60846-2:2018
IEC 60846-2:2015 © IEC 2015 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
45B/822/FDIS 45B/834/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60846 series, under the general title Radiation protection
instrumentation – Ambient and/or directional dose equivalent (rate) meters and/or monitors for
beta, X and gamma radiation, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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SIST EN 60846-2:2018
– 6 – IEC 60846-2:2015 © IEC 2015
RADIATION PROTECTION INSTRUMENTATION –
AMBIENT AND/OR DIRECTIONAL DOSE EQUIVALENT (RATE)
METERS AND/OR MONITORS FOR BETA, X AND GAMMA RADIATION –

Part 2: High range beta and photon dose and dose rate portable
instruments for emergency radiation protection purposes



1 Scope and object
This part of IEC 60846 applies to portable or transportable dose equivalent (rate) meters
and/or monitors for the measurement of ambient and/or directional dose equivalent (rate) from
external beta, X and gamma radiation for energies up to 10 MeV during emergency situations.
The object of this International Standard is to specify the design requirements and the
performance characteristics of dose equivalent (rate) meters intended for the determination of
ambient and/or directional dose equivalent (rate) as defined in ICRU Report 47 under
emergency conditions. With the exception of modified or new clauses listed below, all clauses
in IEC 60846-1:2009 are applicable for instruments used for emergency purposes.
This International Standard does not specify which instruments are required nor does it
consider the numbers or specific locations of such instruments. This International Standard
does not identify instrumentation for specific types of accidents. It is essential that the rated
ranges of the instruments and the radiological and non-radiological conditions for which the
instruments are designed adequately cover the accident and post-accident conditions as
determined by accident analysis and/or specified by appropriate regulatory authorities or
qualified individuals. It is expected that accidents will involve both dose equivalent (rate) and
environmental extremes (e.g. temperature and humidity). Specifications for instruments for
measuring dose equivalent rates less than the minimum detectable dose rate level specified
in this International Standard are contained in IEC 60846-1:2009. Where such instruments are
also used for emergency measurements, the requirements of this International Standard
apply.
Although this International Standard specifies the requirements for instruments primarily for
emergency use, such instruments may also be used for on-site measurements at other times.
If the instrument has a remote detector and if an additional detector is provided in the
measuring assembly to measure dose equivalent rate at the location of the operator, the
requirements apply to both of the detectors.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
This clause of IEC 60846-1:2009 applies, with the following additional references:
IEC 60325:2002, Radiation protection instrumentation – Alpha, beta and alpha/beta (beta
energy > 60 keV) contamination meters and monitors
IEC 60846-1:2009, Radiation protection instrumentation – Ambient and/or directional dose
equivalent (rate) meters and/or monitors for beta, X and gamma radiation – Part 1: Portable
workplace and environmental meters and monitors

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SIST EN 60846-2:2018
IEC 60846-2:2015 © IEC 2015 – 7 –
3 Terms and definitions
For the purposes of this document, the terms and definitions given in 3.1 to 3.33 of
IEC 60846-1:2009 and the following apply:
3.34
extracameral response
response to radiation of all the parts of the instrument except the detector itself
3.35
emergency situation
situation in which the dose equivalent (rates) of interest and one or more of the influence
quantities are not covered in IEC 60846-1
4 Units and list of symbols
For the purposes of this standard, the units and list of symbols given in 4.1 to 4.2 of
IEC 60846-1:2009 apply, without modifications.
5 General characteristics of ambient dose equivalent (rate) meters for
emergency purposes
For the purposes of this standard, 5.1 to 5.14 of IEC 60846-1:2009 apply, without
modifications, except as stated in the following subclauses. The changed subclauses are
identified by the same number as in IEC 60846-1:2009 or, for new subclauses, by a higher
number not used in IEC 60846-1:2009.
5.2 Read-out
Single scale is preferred. If multiple scales are used, the changing of measuring range and
read-out scale shall be simultaneous and shall be clearly displayed. All scales shall be
readable under normal lighting conditions.
5.3 Dose equivalent and dose equivalent rate range
The implementation of ICRP recommendations requires the determination of dose equivalent
rate over a wide range of values. Under some circumstances, dose equivalent rates as high
–1
require measurement. For application as an emergency instrument, the dose
as 10 Sv h
–1 –1
equivalent rates of interest are within the range from approximately 1 mSv h to 10 Sv h . If
integrating capability is provided, the range between 1 mSv to 10 Sv usually is of interest.
5.5 Minimum range of measurement
The minimum effective range of measurement of dose equivalent rate shall cover at least four
–1 –1
orders of magnitude and shall include the range from 1 mSv h to 10 Sv h . The minimum
effective range of dose equivalent shall cover at least four orders of magnitude and shall
include 10 Sv.
5.15 Portability
In the case of survey meters, the complete instrument should not exceed 4 kg in weight and
shall be equipped with handles, straps or other means to facilitate operation while being
carried. It is recognized that an extension probe or some other means may be required to
reduce the dose to the operator.

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SIST EN 60846-2:2018
– 8 – IEC 60846-2:2015 © IEC 2015
5.16 Protection of switches
Switches and other controls shall be protected to prevent inadvertent de-activation or mal-
operation of the instrument.
5.17 Use of extension probe
If an extension probe is to be used, the instrument including the probe and all associated
equipment necessary for measurements including the extension device extended to the worst
case configuration shall be tested. Details of the test method shall be made available along
with the results.
5.18 Contamination probe
Emergency dose rate monitors are frequently provided with a surface contamination probe.
This probe shall meet the requirements of IEC 60325.
6 General test procedures
For the purposes of this standard, 6.1 to 6.14 of IEC 60846-1:2009 apply, without
modifications.
7 Additivity of indicated value
For the purposes of this standard, 7.1 to 7.3 of IEC 60846-1:2009 apply, without
modifications.
8 Radiation performance requirements and tests
For the purposes of this standard, 8.1 to 8.13 of IEC 60846-1:2009 apply, without
modifications, except as stated in the following subclauses. The changed subclauses are
identified by the same number as in IEC 60846-1:2009 or, for new subclauses, by a higher
number not used in IEC 60846-1:2009.
8.4 Variation of the response due to photon radiation energy and angle of incidence
 
8.4.3 Measuring quantity H'(0,07), (0,07), H*(10) or *(10) for telescopic or
H' H
remote cylindrical probes
8.4.3.1 General
Where telescopic or remote cylindrical probes with their calibration direction perpendicular to
the axis of symmetry are used for emergency instrumentation, this subclause 8.4.3 replaces
8.4.1 and 8.4.2 of IEC 60846-1:2009. In all other cases, subclauses 8.4.1 and 8.4.2 of
IEC 60846-1:2009 apply, without modification.
8.4.3.2 Requirements
The variation of the relative response due to a change of the photon radiation energy and
angle of photon radiation incidence shall not exceed the following values:
• –29 % to 67 % for photon radiation energies of 80 keV to 1,5 MeV and angl
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