Since this type of test runs over a long period of time, it is typical to test multiple specimens at once. In this way it is possible to achieve statistically verified test results. The testing machines are equipped with multiple test axes.
Conditioning is an important part of the test. It is necessary to prevent thermal expansion due to temperature fluctuations, which overlap the creep strain. For this reason it is necessary to ensure that the ambient temperature remains constant throughout the test. For tests above or below ambient temperature, precisely controlled temperature chambers are used.
The specimen strain is determined optically by modern creep test systems that use a high-precision video measurement system. It is mounted behind the test axes to allow access to the system by the operator from the front.
The electromechanical creep testing machine, KappaMultistation, is equipped with a load cell and one drive per test axis. Along with creep testing,they can be used for quasistatic test methods, for example, to perform a tensile test to ISO 527-2.