EN ISO 11064-6:2005

SLOVENSKI STANDARD
01-november-2005
Ergonomsko načrtovanje krmilnih centrov – 6. del: Zahteve za delovno okolje
krmilnih centrov (ISO 11064-6:2005)
Ergonomic design of control centres - Part 6: Environmental requirements for control
centres (ISO 11064-6:2005)
Ergonomische Gestaltung von Leitzentralen - Teil 6: Umgebungsbezogene
Anforderungen an Leitzentralen (ISO 11064-6:2005)
Conception ergonomique des centres de commande - Partie 6: Exigences relatives a
l'environnement pour les centres de commande (ISO 11064-6:2005)
Ta slovenski standard je istoveten z: EN ISO 11064-6:2005
ICS:
13.180 Ergonomija Ergonomics
25.040.10 Večoperacijski stroji Machining centres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 11064-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2005
ICS 13.180
English Version
Ergonomic design of control centres - Part 6: Environmental
requirements for control centres (ISO 11064-6:2005)
Conception ergonomique des centres de commande - Ergonomische Gestaltung von Leitzentralen - Teil 6:
Partie 6: Exigences relatives à l'environnement pour les Umgebungsbezogene Anforderungen an Leitzentralen (ISO
centres de commande (ISO 11064-6:2005) 11064-6:2005)
This European Standard was approved by CEN on 9 May 2005.
CEN 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 CEN 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 CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
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© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11064-6:2005: E
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Foreword
This document (EN ISO 11064-6:2005) has been prepared by Technical Committee ISO/TC 159
"Ergonomics" in collaboration with Technical Committee CEN/TC 122 "Ergonomics", the
secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by January 2006, and conflicting national
standards shall be withdrawn at the latest by January 2006.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: 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.

Endorsement notice
The text of ISO 11064-6:2005 has been approved by CEN as EN ISO 11064-6:2005 without any
modifications.
INTERNATIONAL ISO
STANDARD 11064-6
First edition
2005-07-01
Ergonomic design of control centres —
Part 6:
Environmental requirements for control
centres
Conception ergonomique des centres de commande —
Partie 6: Exigences relatives à l'environnement pour les centres de
commande
Reference number
ISO 11064-6:2005(E)
©
ISO 2005
ISO 11064-6:2005(E)
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ii © ISO 2005 – All rights reserved

ISO 11064-6:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 General principles for environmental design . 5
5 Requirements and recommendations .7
5.1 Ergonomic aspects and thermal conditions. 7
5.2 Ergonomics and air quality. 8
5.3 Ergonomics and lighting. 9
5.4 Ergonomics and acoustics . 12
5.5 Ergonomics and vibration . 14
5.6 Ergonomics and interior design and aesthetics . 15
Annex A (informative) Recommendations for environmental design. 17
Bibliography . 20

ISO 11064-6:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11064-6 was prepared by Technical Committee ISO/TC 159, Ergonomics, Subcommittee SC 4,
Ergonomics of human-system interaction.
ISO 11064 consists of the following parts, under the general title Ergonomic design of control centres:
 Part 1: Principles for the design of control centres
 Part 2: Principles for the arrangement of control suites
 Part 3: Control room layout
 Part 4: Layout and dimensions of workstations
 Part 6: Environmental requirements for control centres
 Part 7: Principles for the evaluation of control centres
iv © ISO 2005 – All rights reserved

ISO 11064-6:2005(E)
Introduction
The environmental aspects associated with the design of man–machine systems need to be addressed, since
poor environments can seriously affect operator performance. In control rooms, these environmental factors
include lighting, humidity, temperature, vibration and noise. These factors also need to take account of shift
work, real-time operations under time pressure and the specialised equipment used in control rooms.
In this part of ISO 11064, environmental requirements are presented which optimize work conditions in such a
way that safety is ensured, health is not impaired and the efficiency of control room operators is promoted.
The degree of specificity of this standard does not extend to national and local requirements, which can vary
between countries and/or regions. In such cases, experts in the relevant areas (human factors and
ergonomics, lighting, acoustics, thermal environment, etc.) will need to be consulted. For specific values on
environmental variables, see Annex A and/or consult local and/or national standards for the relevant country
or region.
INTERNATIONAL STANDARD ISO 11064-6:2005(E)

Ergonomic design of control centres —
Part 6:
Environmental requirements for control centres
1 Scope
This part of ISO 11064 gives environmental requirements as well as recommendations for the ergonomic
design, upgrading or refurbishment of control rooms and other functional areas within the control suite.
The following aspects are covered:
 thermal environment (temperate regions);
 air quality;
 lighting environment;
 acoustic environment;
 vibration;
 aesthetics and interior design.
It is applicable to all types of control centres, including those for the process industry, transport and
dispatching systems and emergency services. Although primarily intended for non-mobile control centres,
many of its principles are relevant to mobile centres such as those found on ships, locomotives and aircraft.
It does not cover the influence of electromagnetic fields. Guidance on the influence of electromagnetic fields
on the image quality of visual displays is given in ISO 9241-6.
This part of ISO 11064 is closely connected with ISO 11064-2 and ISO 11064-3, which describe the control
room layout. It also relates to the design of equipment interfaces, which are influenced by environmental
factors. It would be prudent for designers to also take account of the more general environmental
requirements associated with display screen equipment use presented in ISO 9241-6 and ISO 9241-7.
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.
ISO 7731, Ergonomics — Danger signals for public and work areas — Auditory danger signals
ISO 7779, Acoustics — Measurement of airborne noise emitted by information technology and
telecommunications equipment
ISO/CIE 8995, Lighting of indoor work places
ISO 11064-6:2005(E)
ISO 9241-6, Ergonomic requirements for office work with visual display terminals (VDTs) — Part 6: Guidance
on the work environment
ISO 13731, Ergonomics of the thermal environment — Vocabulary and symbols
IEC 60651, Sound level meters — Electromagnetic and electrostatic compatibility and test procedures
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
A-weighted sound pressure level
sound level
logarithm to the base 10 of the ratio of a given sound pressure to the reference sound pressure of 20 µPa, the
sound pressure being obtained with a standard frequency weighting and with standard exponentially weighted
time-averaging
NOTE The sound level in decibels is twenty times the logarithm to the base ten of that ratio.
[IEC 60651]
3.2
air velocity
v
a
average of the effective velocity of the air, i.e. the magnitude of the velocity vector of the flow at the measuring
point considered, over an interval of time (measuring period), expressed in metres per second
3.3
brightness
attribute of a visual sensation associated with the amount of light emitted from a given area
NOTE 1 It is the subjective correlate of luminance.
NOTE 2 See ISO 8995.
3.4
contrast
〈subjective sense〉 subjective assessment of the difference in appearance of two parts of a field of view seen
simultaneously or successively
NOTE Hence: brightness contrast, colour contrast, simultaneous contrast, successive contrast.
3.5
contrast
〈objective sense〉 quantities usually defined as a luminance ratio (usually for successive contrasts L /L ) or, for
2 1
surfaces viewed simultaneously, by the equation
L − L
L
where
L is the dominant or background luminance

L is the object luminance
2 © ISO 2005 – All rights reserved

ISO 11064-6:2005(E)
NOTE 1 When the areas of different luminance are comparable in size and it is desirable to take an average, the
following formula can be used instead:
LL−
0,5 L + L
()
NOTE 2 See ISO 8995.
3.6
equivalent continuous A-weighted sound pressure level
L
Aeq,T
A-weighted sound pressure level, in decibels, given by the equation

t
1 1pt()
Α
L = 10 lg dt
Aeq,T
∫
2
tt−
p
21
t

where t − t is the period T over which the average is taken started at t and ending at t
2 1 1 2
NOTE See ISO 7779.
3.7
glare
discomfort or impairment of vision experienced when parts of the visual field are excessively bright in relation
to the brightness of the general surroundings to which the eyes are adapted
NOTE See ISO 8995.
3.8
illuminance
E
density of the luminous flux (φ) incident at a point, expressed in lux (1 lx = 1lm/m )
NOTE 1 In practice, the average illuminance of a given surface is calculated by dividing the flux falling on it by the area
(A) of the illuminated surface:
φ
E =
A
NOTE 2 See ISO 8995.
3.9
luminance
L
physical measurement of the stimulus which produces the sensation of brightness, in terms of the luminous
intensity in a given direction, ε, (usually towards the observer), per unit area, of an emitting, transmitting or
reflecting surface, expressed in candelas per square metre
NOTE 1 It is the luminous intensity of the light emitted or reflected in a given direction from an element of the surface,
divided by the area of the element projected in the same direction.
NOTE 2 The luminance L, in candelas per square metre, of a perfectly matt surface is given by:
ρ × E

L =

π

ISO 11064-6:2005(E)
where
E is the illuminance, in lux (lx);
ρ is the reflectance of the surface considered.
NOTE 3 See ISO 8995.
3.10
luminance balance
ratio between the luminances of the displayed image and its adjacent surround, or sequentially viewed
surfaces
[ISO 9241-6:1999, 3.13]
3.11
reflectance
ρ
ratio of the luminous flux reflected from a surface (φ ) to the luminous flux incident (φ ) on it
r 0
NOTE 1 The reflectance depends on the direction of the incident light, except for matt surfaces, and on its spectral
distribution.
φ
r
NOTE 2 Reflectance ρ =
φ
NOTE 3 See ISO 8995.
3.12
reflected glare
glare resulting from specular reflections from polished or glossy surfaces
NOTE See ISO 8995.
3.13
relative humidity
RH
ratio (× 100) between the partial pressure of water vapour in the air and the water vapour saturation pressure
at the same temperature and the same total pressure
[ISO 13731:2001, 2.96]
3.14
reverberation
continuation of a sound in an enclosed space after the source has stopped, result of reflections from the
boundary surfaces of the room
[ISO 9241-6:1999, 3.21]
3.15
air temperature
t
a
dry-bulb temperature of the air surrounding the occupant
NOTE It is expressed in degrees Celsius (°C).
[ISO 13731:2001, 2.2]
4 © ISO 2005 – All rights reserved

ISO 11064-6:2005(E)
4 General principles for environmental design
The following nine general ergonomic principles shall be followed for good environmental design.
NOTE 1 It is important to recognise that design features related to one particular environmental principle can have an
impact on other principles.
Principle 1: Operator task demands and comfort shall be the primary focus when designing control centre
environments.
Principle 2: In order to optimize operator’s performance and comfort, levels of illumination as well as
temperature shall be adjustable in accordance with the operator’s needs.
Principle 3: Where conflicting demands exist between different environmental features (i.e. thermal conditions,
air quality, lighting, acoustics, vibration, and interior design and aesthetics), a balance shall be sought which
favours operational needs.
NOTE 2 One way to achieve this would be to consult experts in human factors and ergonomics with the aim of
identifying optimal compromises between conflicting demands, e.g. to design a lighting system in which old and new
equipment work in parallel in upgraded control centres.
Principle 4: External factors providing operational information (e.g. security views, weather conditions) shall
be taken into account when designing the control centre.
Principle 5: Environmental factors work in combination and shall be taken into account in a holistic way,
i.e. the whole environmental entity needs to be taken into account, (e.g. interaction between air conditioning
systems generating noise and the acoustic environment).
Principle 6: Environmental design shall be used to mitigate the detrimental effects of shift work, e.g. raising
ambient air temperature in the early morning.
NOTE 3 A complementary approach would be to consider improved shift work schedules.
Principle 7: The design of environmental systems shall take account of future change (e.g. equipment,
workstation layouts, and work organisation).
NOTE 4 This can be done by designing for flexibility (location of lighting, ventilation ducts, etc.). Another possible
measure would be to reserve extra capacity in the environmental systems.
Principle 8: The quality of the working environment shall be an integral part of the overall design process for
control centres, as shown in Figure 1.
NOTE 5 The steps presented in Figure 1 are part of a wider process discussed in ISO 11064-1.
Principle 9: An iterative and multi-disciplinary design approach shall be taken in order to achieve an
appropriate balance between buildings, equipment and the control centre environment. This approach shall be
checked and evaluated as the design develops.
NOTE 6 This approach is necessary because most building and equipment design features have a potential impact on
the design of the control centre environment. For example, the heat dissipation of lighting equipment can affect an air
conditioning system.
ISO 11064-6:2005(E)
Figure 1 — Overall process for control room environmental design
6 © ISO 2005 – All rights reserved

ISO 11064-6:2005(E)
5 Requirements and recommendations
5.1 Ergonomics and thermal conditions
5.1.1 The design of an appropriate thermal environment needs to take account of such factors as building
design, operator activities and climatic factors. The following should be taken into account:
 the nature and range of operator activities (sitting or walking);
 the typical clothing to be worn by operators (including any special protective clothing);
 operator numbers and shift patterns;
 total heat dissipation generated by the equipment and lighting;
 the orientation of control room in respect of solar gain;
 the requirement, if any, of pressurized rooms;
 thermal transfer from external walls;
 the number of doors and windows;
 shielding properties of construction materials;
 the potential for shielding direct sunlight;
 the geographical location of the building.
5.1.2 Localised heat in control rooms due to thermal radiation or hot air should be avoided by suitable
control of the climatic conditions.
5.1.3 Heating, ventilation and air-conditioning (HVAC) systems shall provide appropriate internal climatic
environmental conditions (i.e. air temperature, humidity and air velocity), whatever the external thermal
conditions.
NOTE 1 Suggested values are presented in Annex A.
NOTE 2 Control rooms in non-temperate parts of the world can necessitate different requirements due to the nature of
the ambient environment, for example in very hot climates.
5.1.4 Human operators shall be provided with appropriate equipment for controlling and monitoring the
temperature in cases where the HVAC systems do not provide suitable internal climatic environmental
conditions.
NOTE Suggested values are presented in Annex A.
5.1.5 When specifying the thermal values,
...