EN 60846:2004

SLOVENSKI SIST EN 60846:2005
STANDARD
julij 2005
Oprema za zaščito pred sevanjem – Merilniki ekvivalentne doze v prostoru
in/ali usmerjene ekvivalentne doze in/ali monitorji sevanja beta, rentgenskega
sevanja in sevanja gama
Radiation protection instrumentation – Ambient and/or directional dose equivalent
(rate) meters and/or monitors for beta, X and gamma radiation
ICS 13.280; 17.240 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60846
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2004

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
(IEC 60846:2002, modified)
Instrumentation pour la radioprotection - Strahlenschutz-Messgeräte –
Instruments pour la mesure et/ou Umgebungs- und Richtungs-
la surveillance de l'équivalent de dose Äquivalentdosis(leistungs)-Messgeräte
(ou du débit d'équivalent de dose) und -Monitore für Beta, Röntgen- und
ambiant et/ou directionnel Gammastrahlung
pour les rayonnements bêta, X et gamma (IEC 60846:2002, modifiziert)
(CEI 60846:2002, modifiée)
This European Standard was approved by CENELEC on 2004-10-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60846:2004 E
Foreword
The text of the International Standard IEC 60846:2002, prepared by SC 45B, Radiation
protection instrumentation, of IEC TC 45, Nuclear instrumentation, together with the common
modifications prepared by the CENELEC BTTF 111-3, Instrumentation for ionizing radiation
measurement and protection, was submitted to the formal vote and was approved by
CENELEC on 2004-10-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-10-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-10-01
Clauses, subclauses, tables and figures which are additional to those in IEC 60846 are
prefixed “Z”.
Annex ZA has been added by CENELEC.
__________
– 3 – EN 60846:2004
Endorsement notice
The text of the International Standard IEC 60846:2002 was approved by CENELEC as a
European Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
3 Terminology
Add:
3.2.Z1
maximum dose equivalent rate (for dosemeters)
the dose rate, specified by the manufacturer, above which the dose reading is no longer within
the requirements of this standard
4 General characteristics of ambient and directional dose equivalent (rate) meters
4.3.10 Delete: “, (see also note 7 in 3.2)”.
4.3.11 Replace reference to 3.2 by reference to 3.4.5 and 3.4.7.
5 Radiation characteristics – Directional dose equivalent (rate) meters
5.1.4.1 Last sentence: replace “alarm rate” by “alarm rates”.
5.2.1 Add a second paragraph reading:
An additional test shall be performed with a beta emitter in the range E between
max
100 keV and 500 keV.
5.2.2 Replace first paragraph by:
85 204 90 90 147
For the beta radiations of Kr or Tl, Sr/ Y and Pm, the response is measured
for 0° angle and for angles of incidence of α = ± 45° in two perpendicular planes
containing the reference direction through the reference point of the directional dose
equivalent (rate) meter.
Delete third paragraph.
5.4 Replace the text of subclause 5.4, Overload characteristics by:
5.4  Overload characteristics
5.4.1  Doserate meters
5.4.1.1  Requirements
The dose equivalent ratemeter shall read off-scale on the high side or shall indicate
overload when exposed to doses rates greater than the maximum of its measuring
range. This requirement shall apply to all ranges.
5.4.1.2  Method of test
The dose equivalent ratemeter shall be submitted to the following dose equivalent
rates for a period of 5 min:
-1
– 100 times the range maximum for range maxima up to and including 0,1 Sv.h ;
-1
– 10 times the range maximum, or 10 Sv.h whichever is the greater, for range
-1
maxima in excess of 0,1 Sv.h .
The indication of dose equivalent rate shall read off-scale on the high side or indicate
overload throughout this period and the dose equivalent ratemeter shall function
within specification within 5 min (footnote 3 as given in the IEC publication) after
completion of this test. This test is applicable to each range.
5.4.2  Dosemeters
5.4.2.1  Requirements
1) The dose equivalent meter shall read off-scale on the high side or shall indicate
overload when exposed to doses greater than the maximum of its measuring
range. This requirement shall apply to all ranges.
2) When subjected to doserates in excess of the maximum doserate limit specified
by the manufacturer there shall be indication that the equipment is not able to
provide correct dose indication.
5.4.2.2  Method of test
1) Subject the dosemeter to doserates to give dose reading in excess of 100 times
the maximum dose that can be indicated. The indication shall be off-scale on the
high side or overload shall be indicated and shall remain so until the dose
indication is reset or the equipment is switched off. The equipment shall not be
reset or switched off for at least 30 min after the equipment has been subjected
to the test dose. The doserate to achieve the required dose shall be less than
the maximum doserate capability as specified by the manufacturer.
2) Subject the dosemeter to a doserate 10 % in excess of that specified as the
doserate limit specified by the manufacturer for a period of 100 s. Ensure that
either the dose indication is within the limits of this standard or indication is
given that the reading of dose is in error. If the latter is not indicated subject the
doserate to increased doserates of 10 % for 100 s until the error indication is
displayed. Prior this the dose indication shall increase as appropriate.

– 5 – EN 60846:2004
5.6.2 Replace “seller” by “manufacturer”.
5.7.1 Add a second paragraph:
If the requirements for dose rate are met, testing for dose may be omitted for
instruments measuring both dose and dose rate.
5.8.1 Add a new title 5.8.1:
5.8.1  Doserate meters
Renumber previous 5.8.1 as 5.8.1.1 and previous 5.8.2 as 5.8.1.2.
Add the following new headline:
5.8.2  Dosemeters
5.8.2.1  Requirements
When subjected to a doserate, the dosemeter shall, within 10 s, indicate at least
90 % but not more than 110 % of the increase under steady-state conditions.
5.8.2.2  Test method
-1
Subject the dosemeter to a doserate of 360 µSv.h for 10 s and note the dose
reading at the end of this 10 s period.
Subject the dosemeter for 10 s to the doserate limit of the instrument as specified by
the manufacturer. At the end of the 10 s period note the dose reading.
The instrument meets the requirements if both values are within ± 10 % of the
reading under steady-state conditions.
6 Radiation characteristics – ambient dose equivalent (rate) meters
6.2.1 In the second paragraph replace: “is either … or …” by “shall be … or …".
Replace the third paragraph by:
If the ambient dosemeter is to be used in the vicinity of nuclear power installations,
the response up to 10 MeV shall to be stated by the manufacturer. The response at
high energies in the reference direction shall be determined and should not differ by
more than ± 40 % from its response to Cs gamma radiation.
Insert a fourth paragraph:
The manufacturer shall state the response at 90° angle of incidence.

6.2.2 Replace the subclause by the following:
6.2.2  Test method
The tests shall be performed using the narrow spectrum series of ISO 4037-1.

The energy dependence of response at angle of incidence α = 0° normalized to the
Cs gamma energy is measured for the energies of the narrow series starting with
high energies down to the first energy that gives a normalized response of less
than 0,6. This test shall be repeated for angles of incidence of α = ± 30° and
α = ± 45° in two perpendicular planes containing the reference direction and through
the reference point of the dose equivalent (rate) meter. The response being
normalised to Cs α = 0°. If for any of these angles of incidence, the minimum
response is greater than 0,6, lower energies shall be measured until the response is
less than this value.
The energy corresponding to the limiting values of 60 % and 140 % of the reference
response shall be determined form the response curves plotted for each angle of
incidence were a straight line shall be drawn between the two values plotted giving
the response just below and above the limit values. The limiting energies are
determine where these lines cross the 0,6 or 1,4 response.
The response of the dose (rate) meter to Cs shall also be determined for the
angles given above and shall be within the limits given.
Where the dose (rate) meter is required to measure energies above 1,5 MeV a
suitable method of test shall be agreed between the purchaser and manufacturer.
In principle, it is desirable that this test be performed at the same dose equivalent
(rate) for each radiation quality. In practice this may not be possible in which case
the indicated dose equivalent (rate) for each radiation quality shall be corrected for
the intrinsic error of the indicated dose equivalent (rate).
Keep the note as given in the IEC publication.
7 Electrical characteristics of directional and ambient dose equivalent (rate) meters
7.1.1 Insert an additional paragraph below the current reading:
For dose equivalent (rate) meters without a set-zero control, the same requirements
and test method apply except the step of setting to zero.
7.2.1 Insert in the third paragraph, behind “± 5 %”:
“(± 5 % in the case of -25 °C to +50 °C)”.
Insert in the fifth paragraph behind “± 20 %”:
“(± 20 % in the case of -25 °C to +50 °C)”.
7.4.4 In the penultimate paragraph replace reference to 7.1 by reference to 9.1.

– 7 – EN 60846:2004
9 Environmental characteristics, performance requirements and tests
9.6.4 Add a new headline:
9.6.4.1  General radiated electromagnetic fields
just below the headline of 9.6.4 (current text of 9.6.4 becomes 9.6.4.1).
Add new subclause:
9.6.4.Z1  Radiated electromagnetic fields of mobile phones
Requirements
The additional indication due to electromagnetic fields must not exceed 0,7 H after
6 min of exposure to the electromagnetic field (see Table 6).
Method of test
Compliance with this performance requirement shall be checked by observing and
recording the indications of the display with the dosemeter set to the most sensitive
range.
-1
The electromagnetic field strength shall be 20 V.m in the frequency range of
800 MHz to 960 MHz and 1,4 GHz to 2,4 GHz in steps of 1 % (see EN 61000-4-3).
To reduce the amount of measurements needed to show compliance with the above
requirement two methods are suggested:
− the first method is to perform tests at radiation frequencies (820; 900) MHz; (1,4;
−
1,5; 1,6; 1,8; 2,0; 2,2 and 2,4) GHz with a field strength of 40 V.m in one
orientation only. At each frequency the test shall be performed for 6 min or the
result corrected for a 6 min measuring time. If any additional indication greater
than one-third of the limits given in Table 6 is observed at one of these given
radiation frequencies, additional tests in the range of ± 5 % around this
−1
frequency in steps of 1 % and with a field strength of 20 V.m shall be carried
out with the dosemeter oriented as described in EN 61000-4-3;
− the second method is to perform an automated sweep with a field strength of
−1 -3
40 V.m at a rate not greater than 1,5 x 10 orders of magnitude per second or
not greater than 1 % of the fundamental per second in one orientation only. If,
during the scan, operational susceptibilities are observed, the frequencies of
susceptibility should be noted. The instrument should then be retested in the
−
range of ± 5 % around this frequency with a field strength of 20 V.m in all
orientations as described in EN 61000-4-3.
9.6.9 Replace “6,0 %” by “60 %”.
10 Summary of characteristics
10 Replace reference to “Tables 2, 3, 4, 5, 6, 7, 8 and 9” by “Tables 2, 3, 4, 5, 6 and 7”.

11 Documentation
Add new subclause:
11.Z1  Type test report
At the request of the purchaser, the manufacturer shall make available the report on the
type tests performed to the requirements of this standard.

Table 4 Replace the first row by the following:
1)
X and gamma radiation 80 keV to 1,5 MeV or 6.2
± 40 %
energy and angle of
30 keV to 150 keV
incidence
and 0° to 45° from reference
direction
Table 5 Correct references to subclauses in the last column as follows:
Replace 7.2 by 5.8, replace the first 7.4 by 7.1, replace 7.5 by 7.2 (twice).

Table 6 Replace 9.6.4 by 9.6.4.1 in the second row
and insert new row just below:
Ra
...