Determination of temp. at which an arbitrary deformation occurs when plastics are subjected to arbitrary bending loads and conditions of continually rising temperature.
Rate of rise of temp. 2 + 0.20C / per min.
Values of VST & HDT are obtained through software. Graphic display and printout through your PC: Penetration/ Deflection Vs Temperature graph and values of VST and HDT could br obtained by attaching a printer to the PC.