The test cell is used for dielectric tests on solid test samples together with the measuring bridge 2830/2831. It determines dissipation factor tan  and relative permittivity (dielectric constant) r on solid insulates such as paper and plastic foils, as well as specific resistivity. It is equipped with a shielded measuring electrode which eliminates stray capacitances that influence test results (guard ring).
The design is the result of longstanding experience in the field of test cell building. It has been designed in accordance with ASTM (USA), IEC and ISO standards and conforms to recommendations of CIGRE.
The 2914 test cell consists of a shielded measuring plate electrode (with guard), and an insulated HV electrode mounted on the base plate, both electrodes can be heated.
A manual and external hydraulic system moves the upper electrode vertically. Once test object surface is reached, pressure between electrode and test object can also be increased. The embedded manometer indicates the specific pressure of the electrodes against the test object.
The electrodes are protected by a protective cover and can be vacuum and filled with protective gas through the available connections.
The test cell is equipped with a safety switch in the cover, ready to be connected to a Tettex power supply.
The base plate includes sockets for the measuring bridge, power supply as well as a temperature indication output.

Advantages
• High precision measurements of samples with low tan d
• Test procedures and results fulfill the standards requirements
• Both dried and impregnated test samples can be tested inside the cell. Impregnation can be done inside the cell
• Reliable and comparable measurement results
• Short heating-up times, temperature is controlled from the measuring bridge 2830/2831 (if available), automated measuring sequences can be easily defined
• Allows safe operation by disconnecting the power supply if the cover is removed
• Wide variety of materials, or several layers of the same material can be tested

Applications:

• Capacitance, tan d (dissipation /power factor) and relative permittivity measurements on liquid insulating materials
• Solid materials such as Organic/synthetic paper, silicone, rubber, polymeric plastic, etc.
• Oil impregnated paper- drying and impregnation process
• Other solid materials
• Research & Development in industry and university