Example of calculation of uncertainty analysis

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Publication Date
22-Jun-2021
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5060 - Close of voting Proof returned by Secretariat
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19-May-2021
Completion Date
19-May-2021
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ISO 9869-2:2018/Amd 1:2021 - Example of calculation of uncertainty analysis
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INTERNATIONAL ISO
STANDARD 9869-2
First edition
2018-08
AMENDMENT 1
2021-06
Thermal insulation — Building
elements — In-situ measurement
of thermal resistance and thermal
transmittance —
Part 2:
Infrared method for frame structure
dwelling
AMENDMENT 1: Example of calculation
of uncertainty analysis
Reference number
ISO 9869-2:2018/Amd.1:2021(E)
ISO 2021
---------------------- Page: 1 ----------------------
ISO 9869-2:2018/Amd.1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 9869-2:2018/Amd.1:2021(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use

in the built environment, Subcommittee SC 1, Test and measurement methods.
A list of all parts in the ISO 9869 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
© ISO 2021 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 9869-2:2018/Amd.1:2021(E)
Thermal insulation — Building elements — In-situ
measurement of thermal resistance and thermal
transmittance —
Part 2:
Infrared method for frame structure dwelling
AMENDMENT 1: Example of calculation of uncertainty analysis
Annex E
Replace Annex E with the following annex:
© ISO 2021 – All rights reserved 1
---------------------- Page: 4 ----------------------
ISO 9869-2:2018/Amd.1:2021(E)
Annex E
(informative)
The calculation example of uncertainty analysis
NOTE This is a simplified uncertainty analysis example for illustrative purpose.
E.1 Listing of uncertainty factors
Table E.1 shows the listing of uncertainty factors.
Table E.1 — Uncertainty factors in measuring the thermal transmittance

Measurement of heat Difference in temperature between Measurement IR camera Whichever is

transfer coefficient the heat transfer coefficient sensor of surface specification greater of 2 %,

and environmental temperature temperature measurement
(ET sensor) value or ±2 °C
Thermo-couple ±0,2 °C
specification
Measurement of heat flow meter Measurement Data logger ±6 μV
output of the heat transfer of voltage specification
coefficient sensor

Heat flow rate Difference in temperature between Measurement IR camera Whichever is

the surface temperature of the heat of surface specification greater of 2 %,
transfer coefficient sensor and temperature measurement
environmental temperature value or ±2 °C
(ET sensor)
Thermo-couple ±0,2 °C
specification
Measurement of heat flow meter Measurement Data logger ±6 μV
output of the heat transfer of voltage specification
coefficient sensor
Measurement of surface Measurement IR camera ±2 % of meas-
temperature of the wall of surface specification urement value
temperature
Thermal Difference in temperature between Measurement IR camera Whichever is

transmittance the surface temperature of the heat of surface specification greater of 2 %,

transfer coefficient sensor and temperature measurement
environmental temperature value or ±2 °C
(ET sensor)
Thermo-couple ±0,2 °C
specification
Measurement of environmental Measurement IR camera Whichever is
temperature (measurement of of surface specification greater of 2 %,
surface temper
...

INTERNATIONAL ISO
STANDARD 9869-2
First edition
2018-08
AMENDMENT 1
Thermal insulation — Building
elements — In-situ measurement
of thermal resistance and thermal
transmittance —
Part 2:
Infrared method for frame structure
dwelling
AMENDMENT 1: Example of calculation
of uncertainty analysis
AMENDEMENT 1
PROOF/ÉPREUVE
Reference number
ISO 9869-2:2018/Amd.1:2021(E)
ISO 2021
---------------------- Page: 1 ----------------------
ISO 9869-2:2018/Amd.1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 9869-2:2018/Amd.1:2021(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use

in the built environment, Subcommittee SC 1, Test and measurement methods.
A list of all parts in the ISO 9869 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
© ISO 2021 – All rights reserved PROOF/ÉPREUVE iii
---------------------- Page: 3 ----------------------
ISO 9869-2:2018/Amd.1:2021(E)
Thermal insulation — Building elements — In-situ
measurement of thermal resistance and thermal
transmittance —
Part 2:
Infrared method for frame structure dwelling
AMENDMENT 1: Example of calculation of uncertainty analysis
Annex E
Replace Annex E with the following annex:
© ISO 2021 – All rights reserved PROOF/ÉPREUVE 1
---------------------- Page: 4 ----------------------
ISO 9869-2:2018/Amd.1:2021(E)
Annex E
(informative)
The calculation example of uncertainty analysis
NOTE This is a simplified uncertainty analysis example for illustrative purpose.
E.1 Listing of uncertainty factors
Table E.1 shows the listing of uncertainty factors.
Table E.1 — Uncertainty factors in measuring the thermal transmittance

Measurement of heat Difference in temperature between Measurement IR camera Whichever is

transfer coefficient the heat transfer coefficient sensor of surface specification greater of 2 %,

and environmental temperature temperature measurement
(ET sensor) value or ±2 °C
Thermo-couple ±0,2 °C
specification
Measurement of heat flow meter Measurement Data logger ±6 μV
output of the heat transfer of voltage specification
coefficient sensor

Heat flow rate Difference in temperature between Measurement IR camera Whichever is

the surface temperature of the heat of surface specification greater of 2 %,
transfer coefficient sensor and temperature measurement
environmental temperature value or ±2 °C
(ET sensor)
Thermo-couple ±0,2 °C
specification
Measurement of heat flow meter Measurement Data logger ±6 μV
output of the heat transfer of voltage specification
coefficient sensor
Measurement of surface Measurement IR camera ±2 % of meas-
temperature of the wall of surface specification urement value
temperature
Thermal Difference in temperature between Measurement IR camera Whichever is

transmittance the surface temperature of the heat of surface specification greater of 2 %,

transfer coefficient sensor and temperature measurement
environmental temperature value or ±2 °C
(ET sensor)
Thermo-couple ±0,2 °C
specification
Measurement of environmental Measurement IR camera Whichever is
temperature (measurement of of surface specification greater of 2 %,
surface temperatur
...

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