Stiffness testing device ET 02-II

Gehman Tester, ET 02-II Gehman Tester, ET 02-II, for determination of the relative stiffness characteristics of vulcanized or thermoplastic rubbers, also called the Gehman procedure. The test is done according to ISO 1432, ASTM D1053, or equivalent standards. The Elastocon Gehman Tester has 6 test stations, is computerized and performs the test automatically. The computer controls both the temperature rise and measures the torsion angle of the samples. The results are displayed in a graph and RM2, RM5, RM10 and RM100 values are calculated. The result can also be presented as a table. We recommend the automatic cooling system with liquid nitrogen that can be supplied. Another useful option is the ET 04 freezer for precooling of the cooling media (usually ethanol), during nights or other times when the instrument is not in use. If the cooling media is pre-cooled, the amount of liquid nitrogen necessary to start the test will decrease remarkably. Standards The Gehman Tester performs well inside the apparatus requirements in ISO 1432 and ASTM D1053. Temperature control Temperature range: -80 °C to +20 °C Accuracy: ± 0,5 °C Resolution: ± 0,1 °C Sensor: Pt 100, 1/3 DIN Angle measurement Indicators: 6 pc digital encoders Resolution: 0,2° Measuring range: adjustable from 0–182°, adjusted at 0–180° Important specifications The rig is raised with the help of a pneumatic cylinder Temperature controller with 0,1 °C setpoint and RS232 interface Solid state relay for safe control Temperature sensor close to the samples Run-time meter (PLC) The casing consists of steel, painted with epoxy paint