EN ISO 8990:1996

Section 1 General
  1.1 Scope
  1.2 Normative reference
  1.3 Definitions
  1.4 Symbols, units and relationships
  1.5 Principle
  1.6 Limitations and sources of errors
Section 2 Apparatus
  2.1 Introduction
  2.2 Design requirements
  2.3 Metering box
  2.4 Guard box
  2.5 Specimen frame
  2.6 Cold side chamber
  2.7 Temperature measurements
  2.8 Instrumentation
  2.9 Performance evaluation and calibration
Section 3 Test procedure
  3.1 Introduction
  3.2 Conditioning of specimen
  3.3 Specimen selection and mounting
  3.4 Test conditions
  3.5 Measurement periods
  3.6 Calculations
  3.7 Test report
Annexes
A Heat transfer at surfaces and environmental temperatures
B Bibliography

Lays down the principles for the design of the apparatus and minimum requirement that shall be met for determination of the laboratory steady-state thermal transmission properties of building components and similar components for industrial use. Does not specify a particular design. Describes also the apparatus, measurement technique and necessary data reporting. Primarily intended for laboratory measurements of large, inhomogeneous specimens. Does not provide for measurements where there is mass transfer through the specimen during the test.