The EB 21 LTHTP cell oven for relaxation tests of rubber has 4 cells with individual control of temperatures and air exchange rate. EB 21 LTHTP can be programmed for temperature cycling between approximately +20 °C to +300 °C, according to ISO 3384-1 method A and B, as well as ISO 6914 method A.

Temperature cycling relaxation tests

Temperature cycling is important within the automotive industry, where the shrinkage of the seals is an important factor, since this can lead to leakage.

The EB 21 LTHTP cell oven for cycling temperature is cooled with water from a chiller, which is used to quickly cool down an ongoing test at a high temperature to a defined room temperature. When any of the 4 cells runs a cooling section, the connected chiller starts and cooling water flows into the cell to cool it down. This oven can run tests according to ISO 3384-1 method A and B, as well as ISO 6914 method A.

The EB 21 LTHTP cell oven is specially designed for stress relaxation tests of rubber. This means that the inner height of the cells are adapted to fit our relaxation rigs to achieve as good thermal contact as possible with the bottom of the cell.

The oven also has an intergrated draught hood that eliminates the changes in the force during the test due to temperature changes in the environment around the top part of the rigs. The hood is made of polycarbonate, and has a temperature control system (Peltier cooling system) capable of keeping the temperature within ± 0,25 °C.

Note: For the best performance of the instrument, we recommend a placement in an environment with a stable temperature between +10 to +30 °C.

Standards

• ISO 188 method A
• ISO 3384-1 method A and B
• ISO 6914 method A

Temperature range

+20 °C to +300 °C

Useful volume

4 × 1,3 litres

Important specifications

• The oven is controlled from a PLC (with a colour touch screen)
• Integrated draught hood
• Special design with controlled air exchange rate and low air speed
• Temperature controller with 0,1 °C setpoint (PLC)
• Fixed over temperature fuse
• Flowmeters with needle valves, for setting the air exchange rate
• The air speed is low and is dependent on the air exchange rate only, as specified in ISO 188 method A
• Alarm for low air pressure (PLC)
• Built in air pump
• Cooling channels in the casing for low surface temperature
• Temperature controlled cooling fan for the electronics cabinet
• Indication of power failure (PLC)
• Run-time meter (PLC)
• Countdown timer (PLC)
• Individual cell identifier “Test name”
• Microfilter for the air which removes 99,99 % of all particles over 0,1 μm

Included accessories

• Manual in English
• Stylus pen for the instrument touch screen
• Accredited calibration including certificate

More information

Product brochure: Elastocon – Stress relaxation and creep systemystems.pdf