FIELD: measuring technique.
SUBSTANCE: method comprises heating of the area of composition material in the section of 250-300 mm in diameter up to a temperature that exceed the operation temperature by 30-50°C and subsequent cooling, determining the temperature increment of the strain-gage resistors mounted in the measuring section of the composition material, repeating the procedure after 3-5 years of operation, and comparing the current and previous readings of the strain-gage resistors.
EFFECT: enhanced reliability.
4 dwg
