ISO 9869-2:2018/Amd 1:2021

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
ISO 9869-2:2018/Amd.1:2021(E)
© ISO 2021
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ISO 9869-2:2018/Amd.1:2021(E)
Foreword
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in the built environment, Subcommittee SC 1, Test and measurement methods.
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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 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
...