CISPR 11:2009/AMD1:2010

CISPR 11 ®
Edition 5.0 2010-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
AMENDMENT 1
AMENDEMENT 1
Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement

Appareils industriels, scientifiques et médicaux – Caractéristiques de
perturbations radioélectriques – Limites et méthodes de mesure

CISPR 11:2009/A1:2010
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CISPR 11 ®
Edition 5.0 2010-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
AMENDMENT 1
AMENDEMENT 1
Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement

Appareils industriels, scientifiques et médicaux – Caractéristiques de
perturbations radioélectriques – Limites et méthodes de mesure

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
G
CODE PRIX
ICS 33.100.10 ISBN 978-2-88910-001-9
– 2 – CISPR 11 Amend. 1 © IEC:2010
FOREWORD
This amendment has been prepared by CISPR subcommittee B: Interference relating to
industrial, scientific and medical radio-frequency apparatus, to other (heavy) industrial
equipment, to overhead power lines, to high voltage equipment and to electric traction.
The text of this amendment is based on the following documents:
FDIS Report on voting
CISPR/B/492/FDIS CISPR/B/496/RVD

Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base 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• withdrawn,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.
_____________
Foreword
In the third paragraph starting with “This fifth edition of CISPR 11 got a more ….”, change the
reference to CISPR 16-4-4 to CISPR 16-4-2.
1 Scope
Add the following note at the end of Clause 1:
NOTE Induction cooking appliances are in the process of being transferred from CISPR 11 to CISPR 14-1. Until
the removal of induction cooking appliances from the scope of CISPR 11, users of the standards may choose either
CISPR 11 or CISPR 14-1 for testing.

3 Terms and definitions
Add, after term and Definition 3.9, the following new term and definition:
3.10
small equipment
equipment, either positioned on a table top or standing on the floor which, including its cables
fits in a cylindrical test volume of 1,2 m in diameter and 1,5 m above the ground plane

6.2.2.3 Frequency range 150 kHz to 1 GHz
Replace the third paragraph as follows:

CISPR 11 Amend. 1 © IEC:2010 – 3 –
On a test site, class A equipment can be measured at a nominal distance of 3 m, 10 m or
30 m (see information in Table 4), and class B equipment at a nominal distance of 3 m or
10 m (see information in Table 5). A measuring distance less than 10 m is allowed only for
equipment which complies with the definition given in 3.10.
Add, after the third paragraph, the following new paragraph:
The limits specified for the 3 m separation distance apply to small equipment only.
Replace the existing Table 4 by the following:
Table 4 – Electromagnetic radiation disturbance limits for class A group 1 equipment
measured on a test site
b
3 m measuring distance
10 m measuring distance
rated input power of rated input power of
Frequency range
a a
≤ 20 kVA ≤ 20 kVA
> 20 kVA > 20 kVA
MHz
Quasi-peak Quasi-peak Quasi-peak Quasi-peak
dB(μV/m) dB(μV/m) dB(μV/m) dB(μV/m)
30  –  230 40 50 50 60
230  – 1 000 47 50 57 60
On a test site, class A equipment can be measured at a nominal distance of 3 m, 10 m or 30 m. A
measuring distance less than 10 m is allowed only for equipment which complies with the definition
given in 3.10. In case of measurements at a separation distance of 30 m, an inverse proportionality
factor of 20 dB per decade shall be used to normalize the measured data to the specified distance for
determining compliance.
At the transition frequency, the more stringent limit shall apply.
a
These limits apply to equipment with a rated input power of > 20 kVA and intended to be used at
locations where there is a distance greater than 30 m between the equipment and third party
sensitive radio communications. The manufacturer shall indicate in the technical documentation that
this equipment is intended to be used at locations where the separation distance to third party
sensitive radio services is > 30 m. If these conditions are not met, then the limits for ≤ 20 kVA
apply.
b
The limits specified for the 3 m separation distance apply only to small equipment meeting the size
criterion defined in 3.10.
Replace the existing Table 5 by the following:
Table 5 – Electromagnetic radiation disturbance limits for class B group 1 equipment
measured on a test site
a
3 m measuring distance
10 m measuring distance
Frequency range
Quasi-peak Quasi-peak
MHz
dB(μV/m) dB(μV/m)
30  –  230 30 40
230  – 1 000 37 47
On a test site, class B equipment can be measured at a nominal distance of 3 m or 10 m. A measuring
distance less than 10 m is allowed only for equipment which complies with the definition given in 3.10.
At the transition frequency, the more stringent limit shall apply.
a
The limits specified for the 3 m separation distance apply only to small equipment meeting the size
criterion defined in 3.10.
– 4 – CISPR 11 Amend. 1 © IEC:2010
6.3.2.3 Frequency range 150 kHz to 1 GHz
Replace the tenth paragraph as follows:
On a test site, class A equipment can be measured at a nominal distance of 3 m, 10 m or
30 m, and class B equipment at a nominal distance of 3 m or 10 m (see Tables 9 and 11).
A measuring distance less than 10 m is allowed only for equipment which complies with the
definition given in 3.10.
Add the following new paragraph eleven:
The limits specified for the 3 m separation distance apply to small equipment only.
Replace the existing Table 9 by the following:

CISPR 11 Amend. 1 © IEC:2010 – 5 –
Table 9 – Electromagnetic radiation disturbance limits for class A group 2 equipment
measured on a test site
Limits for a measuring distance D in m
On a test site D = 30 m On a test site D = 10 m On a test site D = 3 m
a
from the equipment from the equipment
from the equipment
Frequency
range
Electric Magnetic Electric Magnetic Electric Magnetic
MHz field field field field field field
Quasi-peak Quasi-peak Quasi-peak Quasi-peak Quasi-peak Quasi-peak
dB(μV/m) dB(μA/m) dB(μV/m) dB(μA/m) dB(μV/m) dB(μA/m)
0,15 – 0,49 – 33,5 – 57,5 – 57,5
0,49 – 1,705 – 23,5 – 47,5 – 47,5
1,705 – 2,194 – 28,5 – 52,5 – 52,5
2,194 – 3,95 – 23,5 – 43,5 – 43,5
3,95 – 20 – 8,5 – 18,5 – 18,5
20 – 30 – –1,5 – 8,5 – 8,5
30 – 47 58 – 68 – 78 –
47 – 53,91 40 – 50 – 60 –
53,91 – 54,56 40 – 50 – 60 –
54,56 – 68 40 – 50 – 60 –
68 – 80,872 53 – 63 – 73 –
78 – 88
80,872 – 81,848 68 – –
81,848 – 87 53 – 63 – 73 –
87 – 134,786 50 – 60 – 70 –
134,786 – 136,414 60 – 70 – 80 –
136,414 – 156 50 – 60 – 70 –
156 – 174 64 – 74 – 84 –
174 – 188,7 40 – 50 – 60 –
188,7 – 190,979 50 – 60 – 70 –
190,979 – 230 40 – 50 – 60 –
230 – 400 50 – 60 – 70 –
400 – 470 53 – 63 – 73 –
470 – 1 000 50 – 60 – 70 –
On a test site, class A equipment can be measured at a nominal distance of 3 m, 10 m or 30 m. A measuring
distance less than 10 m is allowed only for equipment which complies with the definition given in 3.10.
At the transition frequency, the more stringent limit shall apply.
a
The limits specified for the 3 m separation distance apply only to small equipment meeting the size
criterion defined in 3.10.
– 6 – CISPR 11 Amend. 1 © IEC:2010
Replace the existing Table 10 by the following:
Table 10 – Electromagnetic radiation disturbance limits for class A EDM and
arc welding equipment measured on a test site
Limits for a measuring distance D in m
Frequency
a
D = 3 m
D = 10 m
range
MHz Quasi-peak Quasi-peak
dB(μV/m) dB(μV/m)
80 90
Decreasing linearly with logarithm of Decreasing linearly with logarithm of
30 – 230
frequency to frequency to
60 70
230 – 1 000 60 70
On a test site, class A equipment can be measured at a nominal distance of 3 m, 10 m or 30 m. A measuring
distance less than 10 m is allowed only for equipment which complies with the definition given in 3.10. In
case of measurements at a separation distance of 30 m, an inverse proportionality factor of 20 dB per
decade shall be used to normalize the measured data to the specified distance for determining compliance.
a
The limits specified for the 3 m separation distance apply only to small equipment meeting the size
criterion defined in 3.10.
Replace the existing Table 11 by the following:
Table 11 – Electromagnetic radiation disturbance limits
for class B group 2 equipment measured on a test site
Limits for a measuring distance D in m
Electric field Magnetic field
Frequency range
b
D = 3 m
D = 3 m
D = 10 m
MHz
a a
Quasi-peak Average Quasi-peak Average Quasi-peak
dB(μV/m) dB(μV/m) dB(μA/m)
Decreasing linearly with the
0,15 – 30 – – – –
logarithm of frequency to
30 – 80,872 30 25 40 35 –
80,872 – 81,848 50 45 60 55 –
81,848 – 134,786 30 25 40 35 –
134,786 – 136,414 50 45 60 55 –
136,414 – 230 30 25 40 35 –
230 – 1 000 37 32 47 42 –
On a test site, class B equipment can be measured at a nominal distance of 3 m or 10 m. A measuring
distance less than 10 m is allowed only for equipment which complies with the definition given in 3.10.
At the transition frequency, the more stringent limit should apply.
a
The average limits apply to magnetron driven equi
...