IEC 60846-1:2009

IEC 60846-1 ®
Edition 1.0 2009-04
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 1: Portable workplace and environmental meters and monitors

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 1: Instruments de mesure et de surveillance portables pour les postes de
travail et l’environnement
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IEC 60846-1 ®
Edition 1.0 2009-04
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 1: Portable workplace and environmental meters and monitors

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 1: Instruments de mesure et de surveillance portables pour les postes de
travail et l’environnement
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XA
CODE PRIX
ICS 13.280 ISBN 978-2-88910-308-9
– 2 – 60846-1 © IEC:2009
CONTENTS
FOREWORD.6
1 Scope and object.8
2 Normative references .9
3 Terms and definitions .10
4 Units and list of symbols.15
4.1 Units .15
4.2 List of symbols .16
5 General characteristics of ambient and directional dose equivalent (rate) meters .18
5.1 Indication .18
5.2 Read-out .18
5.3 Dose equivalent rate range.18
5.4 Effective range of measurement .18
5.5 Minimum range of measurement.19
5.6 Rated range of an influence quantity .19
5.7 Minimum rated range of influence quantity .19
5.8 Alarm levels .19
5.9 Additional indication .20
5.10 Failure operation of indication .20
5.11 Ease of decontamination .20
5.12 Information given on the instruments.20
5.13 Algorithm to evaluate the indicated value .20
5.14 Classification of the dosemeters.20
6 General test procedures .20
6.1 Instructions for use.20
6.2 Nature of tests.21
6.3 Reference conditions and standard test conditions .21
6.4 Tests for influence quantities of type F .21
6.5 Tests for influence quantities of type S.21
6.6 Consideration of non-linearity.21
6.7 Consideration of several detectors or signals in a dosemeter .21
6.8 Position of dose equivalent (rate) meter for test purposes .22
6.9 Low dose equivalent rates.22
6.10 Statistical fluctuations .22
6.11 Production of reference radiation.22
6.12 Reference photon radiation .22
6.13 Reference beta radiation .23
6.14 Determination of dose equivalent (rate) response.23
7 Additivity of indicated value .23
7.1 Requirements.23
7.2 Method of test .23
7.3 Interpretation of the results .24
8 Radiation performance requirements and tests .24
8.1 General .24
8.2 Consideration of the uncertainty of the conventional quantity value .24
8.3 Model function.24

60846-1 © IEC:2009 – 3 –
8.4 Variation of the response due to photon radiation energy and angle of
incidence.24
&
8.4.1 Measuring quantity H'(0,07) or H'(0,07) .24
&
8.4.2 Measuring quantity H*(10) or H*(10) .25
8.5 Variation of the response due to beta radiation energy and angle of
incidence.26
&
8.5.1 Measuring quantity H'(0,07) or H'(0,07) .26
&
8.5.2 Measuring quantity H*(10) or H*(10) .27
8.6 Response to neutron radiation.28
8.6.1 Requirements .28
8.6.2 Test method .28
8.7 Linearity and statistical fluctuations .28
8.7.1 General .28
8.7.2 Requirements .28
8.7.3 Method of test .28
8.7.4 Interpretation of the results.29
8.8 Overload characteristics .30
8.8.1 Dose equivalent meters .30
8.8.2 Dose equivalent ratemeters .30
8.9 Response time .31
8.9.1 Dose equivalent meters .31
8.9.2 Dose equivalent ratemeters .31
8.10 Interrelation between response time and statistical fluctuations.32
8.11 Variation of the response due to dose rate dependence of dose
measurements.32
8.11.1 General .32
8.11.2 Requirements .32
8.11.3 Method of test using radiation sources .33
8.11.4 Method of test using natural radiation .33
8.11.5 Interpretation of the results.33
8.12 Response to pulsed ionizing radiation fields .33
8.12.1 Requirements .33
8.12.2 Test method .33
8.13 Requirements on the accuracy of alarm of dose equivalent (rate) monitors.33
8.13.1 Dose equivalent alarm .33
8.13.2 Dose equivalent rate alarm.34
9 Electrical characteristics of directional and ambient dose equivalent (rate) meters .35
9.1 Stability of zero indication with time.35
9.1.1 Requirements .35
9.1.2 Test method .35
9.1.3 Interpretation of the results.35
9.2 Warm-up time.35
9.2.1 Requirements .35
9.2.2 Test method .35
9.2.3 Interpretation of the results.35
9.3 Power supplies.36
9.3.1 General .36
9.3.2 Requirements .36
9.3.3 Test method .36

– 4 – 60846-1 © IEC:2009
10 Mechanical characteristics of directional and ambient dose equivalent (rate)
meters .37
10.1 Shock during operation (microphonics).37
10.1.1 General .37
10.1.2 Requirements .37
10.1.3 Method of test and interpretation of the results .37
10.2 Drop test during transport.38
10.2.1 Requirements .38
10.2.2 Test method .38
10.2.3 Interpretation of the results.38
10.3 Orientation of dose equivalent (rate) meter (geotropism) .38
10.3.1 General .38
10.3.2 Requirements .38
10.3.3 Test method .38
11 Environmental characteristics, performance requirements and tests .39
11.1 General .39
11.2 Ambient temperature .39
11.2.1 Requirements .39
11.2.2 Test method .39
11.2.3 Interpretation of the results.39
11.3 Relative humidity.39
11.3.1 Requirements .39
11.3.2 Test method .39
11.3.3 Interpretation of the results.40
11.4 Atmospheric pressure.40
11.4.1 Requirements .40
11.4.2 Test method .40
11.5 Sealing against moisture .40
11.6 Storage and transport.40
11.7 Electromagnetic compatibility .40
11.7.1 General .40
11.7.2 Emission of electromagnetic radiation.41
11.7.3 Electrostatic discharge .41
11.7.4 Radiated electromagnetic fields.41
11.7.5 Conducted disturbances induced by radio-frequencies .42
11.7.6 50 Hz/60 Hz magnetic field.42
12 Software.43
12.1 General .43
12.2 Requirements.43
12.2.1 General requirements .43
12.2.2 Design and structure of the software .43
12.2.3 Protection of the software and data .43
12.2.4 Documentation .44
12.3 Method of test .44
12.3.1 General .44
12.3.2 Testing the documentation.45
13 Summary of characteristics .45
14 Documentation .45

60846-1 © IEC:2009 – 5 –
14.1 Information on the instrument .45
14.2 Certificate .45
14.3 Operation and maintenance manual .46
14.4 Type test report.46
Annex A (normative) Statistical fluctuations .52
Annex B (informative) Usage categories of ambient/directional dose (rate) meters .54
Annex C (informative) Calibration of ambient dose equivalent (rate) meters for
environmental monitoring.55
Bibliography.57

Table 1 – Measuring quantities and energy ranges covered by the standard.118
Table 2 – Symbols (and abbreviated terms) .1116
Table 3 – Values of c and c for w different dose (rate) values and n indications for
1 2
each dose (rate) value .1146
Table 4 – Reference conditions and standard test conditions .1147
Table 5 – Radiation characteristics of directional dose equivalent (rate) meters.1148
Table 6 – Radiation characteristics of ambient dose equivalent (rate) meters .1149
Table 7 – Electrical, mechanical and environmental characteristics of directional and
ambient dose equivalent (rate) meters .1150
Table 8 – Maximum values of deviation due to electromagnetic disturbances .1150
Table 9 – Mechanical performance under test conditions .1151
Table A.1 – Number of instrument readings required to detect true differences (95 %
confidence level) between two sets of instrument readings on the same instrument.1153
Table B.1 – Usage categories of ambient or directional dose (rate) meters .1154

– 6 – 60846-1 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
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

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,
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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-
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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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 60846-1 has been prepared by subcommittee 45B: Radiation pro-
tection instrumentation, of IEC technical committee 45: Nuclear instrumentation.
This edition cancels and replaces the second edition of IEC 60846 published in 2002 of which
it constitutes a technical revision. It also replaces IEC 61017-1:1991 and IEC 61017-2:1994
as far as portable equipment is concerned.
The text of this standard is based on the following documents:
FDIS Report on voting
45B/603/FDIS 45B/611/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.

60846-1 © IEC:2009 – 7 –
A list of all parts of the IEC 60846 series can be found, under the general title Radiation
protection instrumentation – Ambient and/or directional dose equivalent (rate) meters and/or
monitors for beta, X and gamma radiation, on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date0 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.
– 8 – 60846-1 © IEC: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

1 Scope and object
This part of the IEC 60846 series applies to dose equivalent (rate) meters and/or monitors for
the measurement of ambient dose equivalent (rate) and/or directional dose equivalent (rate)
from external beta, X and gamma radiation, as recommended in ICRU, Report 47.
NOTE 1 If both quantities, ambient dose equivalent and directional dose equivalent are meant, the term dose
equivalent may be used as an abbreviation.
This part of IEC 60846 series applies only to portable meters and monitors which are intended
to be used in both the workplace and the environment. It applies to devices that measure the
dose equivalent or dose equivalent rate from external beta and/or X and gamma radiation in
–1
the dose range between 0,01 μSv and 10 Sv and the dose rate range between 0,01 μSv h
–1
and 10 Sv h and in the energy ranges given in the following Table. All the energy values are
mean energies with respect to the prevailing dose quantity.
Table 1 – Measuring quantities and energy ranges covered by the standard
Energy range for Energy range for
Measuring quantity
Photon radiation Beta-particle radiation
H*(10) 12 keV to 10 MeV —
a
0,07 MeV to 1,2 MeV
H'(0,07) 8 keV to 250 keV almost equivalent to E from
max
225 keV to 3,54 MeV
a
For beta-particle radiation, an energy of 0,07 MeV is required to penetrate the dead
layer of skin of 0,07 mm (almost equivalent to 0,07 mm of ICRU tissue) nominal depth.
NOTE 2 Where a dose rate meter or monitor may be attached to a supplementary probe used to monitor conta-
mination, the relevant standard for that probe is IEC 60325.
If national legislation requires the use of different measuring quantities, for example, air
kerma or exposure, the standard may be used with the respective adjustments.
In this document, the expression "dose equivalent (rate)" is used when the provisions apply to
both the measurement of dose equivalent and the measurement of dose equivalent rate.
NOTE 3 It does not apply to medical radiology which is within the scope of technical committee 62, where the
conditions of radiation exposure may be extremely inhomogeneous, but precisely known.
NOTE 4 It does not apply to instruments intended to be worn by an individual for the purpose of estimating the
radiation dose received by that individual.
The object of this standard is to specify the design requirements and the performance
characteristics of dose equivalent (rate) meters intended for the determination of ambient
dose equivalent (rate) and directional dose equivalent (rate) as defined in ICRU Report 47.
Accordingly, this standard specifies:
a) general characteristics, the functions and performance characteristics of dose equivalent
(rate) meters;
60846-1 © IEC:2009 – 9 –
b) the methods of test to be used to determine compliance with the requirements of this
standard.
Some countries may wish to use this type of dose equivalent (rate) meter for measurements
in the framework of legal metrology.
2 Normative references
The following referenced documents are indispensable for the application 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 60050-151:2001, International Electrotechnical Vocabulary (IEV) – Part 151: Electrical
and magnetic devices
IEC 60050-393:2003, International Electrotechnical Vocabulary (IEV) – Part 393: Nuclear
instrumentation – Physical phenomena and basic concepts
IEC 60050-394:2007, International Electrotechnical Vocabulary (IEV) – Part 394: Nuclear
instrumentation – Instruments, systems, equipment and detectors
IEC 60068-2-31:2008, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling
shocks, primarily for equipment-type specimens
IEC 60086-1:2006, Primary batteries – Part 1: General
IEC 60086-2:2006, Primary batteries – Part 2: Physical and electrical specifications
IEC 60359:2001, Electrical and electronic measurement equipment – Expression of
performance
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
Amendment 1 (1999) 1F1F0F
IEC 61000-4-2:1995, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
Amendment 1 (1998)
Amendment 2 (2000) 2F2F1F
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
Amendment 1 (2007) 3F3F2F
IEC 61000-4-6:2008, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-8:1993, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test
Amendment 1 (2000) 4F4F3F
—————————
1 There exists a consolidated edition (2.1) which includes IEC 60529 (1989) and its Amendment 1 (1999).

There exists a consolidated edition (1.2) which includes IEC 61000-4-2 (1995), its Amendment 1 (1998) and its
Amendment 2 (2000).
3 There exists a consolidated edition (3.1) which includes IEC 61000-4-3 (2006) and its Amendment 1 (2007).

4 There exists a consolidated edition (1.1) which includes IEC 61000-4-8 (1993) and its Amendment 1 (2000).

– 10 – 60846-1 © IEC:2009
IEC 61000-6-2:2005, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity for industrial environments
IEC 61187:1993, Electrical and electronic measuring equipment – Documentation
IEC/TR 62461:2006, Radiation protection instrumentation – Determination of uncertainty in
measurement
ISO/IEC Guide 98-3:2008, Uncertainty of measurement – Part 3: Guide to the expression of
uncertainty in measurement (GUM:1995)
ISO/IEC Guide 99:2007, International vocabulary of metrology – Basic and general concepts
and associated terms (VIM)
ISO 4037-1:1996, X and gamma reference radiation for calibrating dosemeters and doserate
meters and for determining their response as a function of photon energy – Part 1: Radiation
characteristics and production methods
ISO 4037-2:1997, X and gamma reference radiation for calibrating dosemeters and doserate
meters and for determining their response as a function of photon energy – Part 2: Dosimetry
for radiation protection over the energy ranges 8 keV to 1,3 MeV and 4 MeV to 9 MeV
ISO 4037-3:1999, X and gamma reference radiation for calibrating dosemeters and doserate
meters and for determining their response as a function of photon energy – Part 3: Calibration
of area and personal dosemeters and the measurement of their response as a function of
energy and angle of incidence
ISO 4037-4:2004, X and gamma reference radiation for calibrating dosemeters and doserate
meters and for determining their response as a function of photon energy – Part 4: Calibration
of area and personal dosemeters in low energy X reference radiation fields
ISO 6980-1:2006, Nuclear energy – Reference beta-particle radiation – Part 1: Methods of
production
ISO 6980-2:2004, Nuclear energy – Reference beta-particle radiation – Part 2: Calibration
fundamentals related to basic quantities characterizing the radiation field
ISO 6980-3:2006, Nuclear energy – Reference beta-particle radiation – Part 3: Calibration of
area and personal dosemeters and determination of their response as a function of beta
radiation energy and angle of incidence
3 Terms and definitions
For the purposes of this document, the definitions given in IEC 60050-393, IEC 60050-394
and IEC 60359, as well as the following terms and definitions apply.
3.1
acceptance test
a contractual test to prove to the customer that the device meets certain conditions of its
specification
3.2
ambient dose equivalent
H*(10)
dose equivalent at a point in a radiation field that would be produced by the corresponding
expanded and aligned field in the ICRU sphere at a depth of 10 mm on the radius opposing
the direction of the aligned field

60846-1 © IEC:2009 – 11 –
NOTE 1 The SI unit of ambient dose equivalent is the sievert (Sv) or its decimal multiples or submultiples
(e.g. mSv).
NOTE 2 The ambient dose equivalent (rate), used for the monitoring of strongly penetrating radiation, is not an
appropriate quantity for any beta radiation even that which is nominally penetrating (ICRU Report 47, 1992).
NOTE 3 When the term dose equivalent alone is used in this standard, the quantities ambient dose equivalent
and directional dose equivalent are implied.
3.3
ambient dose equivalent rate
&
H *()10
ratio of dH*(10) by dt, where dH*(10) is the increment of ambient dose equivalent in the time
interval dt
dH * (10)
&
H * (10) =
dt
–1
NOTE The SI unit of ambient dose equivalent rate is the sievert per second (Sv s ). Units of ambient dose
equivalent rate are any quotient of the sievert or its decimal multiples or submultiples by a suitable unit of time
–1
(e.g. mSv h ).
3.4
coefficient of variation
v
ratio of the estimate of standard deviation s to the arithmetic mean x of a set of n
measurements
n
s 1 1
ν = = ()x – x
∑ i
x x n – 1
i =1
3.5
(complete) result of a measurement
set of values attributed to a measurand, including a value, the corresponding uncertainty and
the unit of the measurand
NOTE 1 The central value of the whole (set of values) can be selected as measured value M and a parameter
characterizing the dispersion as uncertainty.
NOTE 2 The result of a measurement is related to the indicated value given by the instrument G and to the values
of correction obtained by calibration and by the use of a model.
NOTE 3 The estimation of M can be based on one or more indicated values.
[IEV 311-01-01, modified]
3.6
conventional quantity value
H
quantity value attributed by agreement to a quantity for a given purpose
NOTE 1 The term “conventional true quantity value” is sometimes used for this concept, but its use is
discouraged.
NOTE 2 Sometimes a conventional quantity value is an estimate of a true quantity value.
NOTE 3 A conventional quantity value is generally accepted as being associated with a suitably small measure-
ment uncertainty, which might be zero.
NOTE 4 In this standard the quantity is the dose equivalent (rate).
[VIM 2.12]
– 12 – 60846-1 © IEC:2009
3.7
deviation
D
difference between the indicated values for the same value of the measurand of a dose equi-
valent (rate) meter, when an influence quantity assumes, successively, two different values
[IEV 311-07-03, modified]
D = G − G
r
where G is the indicated value under the effect of an influence quantity and
G is the indicated value under reference conditions.
r
NOTE 1 The original term in IEV 311-07-03 reads “variation (due to an influence quantity)”. In order not to
confuse variation (of the indicated value) and variation of the response, in this standard, the term is called
“deviation”.
NOTE 2 The deviation can be positive or negative resulting in an increase or a decrease of the indicated value,
respectively.
NOTE 3 The deviation is of special importance for influence quantities of Type S.
3.8
directional dose equivalent
H′(0,07)
dose equivalent at a point in a radiation field that would be produced by the corresponding
expanded field in the ICRU sphere at a depth of 0,07 mm, on a radius in a specified direction
NOTE The SI unit of directional dose equivalent is the sievert (Sv) or its decimal multiples or submultiples
(e.g. mSv).
3.9
directional dose equivalent rate
&
′
H()0,07
ratio of dH′(0,07) by dt, where )dH ′(0,07 is the increment of directional dose equivalent in the
time interval dt
dH (0,07)
′
&
H ′(0,07) =
dt
–1
NOTE The SI unit of directional dose equivalent rate is the sievert per second (Sv s ). Units of directional dose
equivalent rate are any quotient of the sievert or its decimal multiples or submultiples by a suitable unit of time
–1
(e.g. mSv h ).
3.10
dose equivalent (rate) meter
assembly intended to measure or evaluate the dose equivalent (rate)
3.11
effective range of measurement (of a dose equivalent (rate) meter)
range of values of the quantity to be measured over which the performance of a dose equiva-
lent (rate) meter meets the requirements of this standard
3.12
indicated value (for the purpose of this standard)
G
value given by the (digital) indication of the dosemeter in units of dose equivalent or dose
equivalent rate
3.13
influence quantity
quantity that is not the measurand but that effects the result of the measurement
NOTE 1 For example, temperature of a micrometer used to measure length.

60846-1 © IEC:2009 – 13 –
[GUM B.2.10]
NOTE 2 If the effect on the result of a measurement of an influence quantity depends on another influence
quantity, these influence quantities are treated as a single one. In this standard, this is the case for the influence
quantities “radiation energy and angle of radiation incidence”.
3.14
influence quantity of type F
influence quantity whose effect on the indicated value is a change in response
NOTE 1 An example is radiation energy and angle of radiation incidence.
NOTE 2 “F” stands for factor: The indication due to radiation is multiplied by a factor due to the influence
quantity.
3.15
influence quantity of type S
influence quantity whose effect on the indicated value is a deviation independent of the
indicated value
NOTE 1 An example is the electromagnetic disturbance.
NOTE 2 All requirements for influence quantities of type S are given with respect to the value of the deviation D.
NOTE 3 “S” stands for sum. The indication is the sum of the indication due to radiation and due to the influence
quantity, e.g., electromagnetic disturbance.
3.16
lower limit of effective range of measurement
H
lowest dose (rate) value included in the effective range of measurement
3.17
maximum dose equivalent rate (for dosemeters)
&
H
max
doserate, specified by the manufa
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