This standard prescribes the general procedure for the determination of thermal conductivity, by means of a heat flow meter, of homogeneous insulating materials whose thermal conductivities do not exceed the limits given in 1.1.1.
For practical purposes this method is limited to the determination of thermal conductivity of specimens having conductivity not in excess of 0·29 W/mK.
For this method, the suggested limiting temperatures of the surfaces to be in contact with the heat flow meter are 225 K and 825 K. These limits may be extended in both directions, but shall be governed both by the materials of construction and by the calibration procedures.
IS 9489-1980 history
1980IS 9489-1980 Method for measuring thermal conductivity of thermal insulation materials using heat flow meter