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An electrically heated foil glued on top of an acrylic wall is employed to measure convective heat transfer on turbine vane platforms. The use of a heater foil requires specific filtering techniques to obtain the searched quantities – heat transfer coefficients and the heat release from the foil. In this paper, limitations of the transient measurement technique are summarized and discussed. Moreover, a method is presented to assess the conditioning of a transient test for un-cooled configurations. This method can be extended to transient measurements involving advanced film cooling schemes.