The Testing Times

830-001 ASTM D2519-02 Electrical Insulating Varnish The ASTM standards (sometimes) give accurate and very precise instructions on how a specific test should be performed. This is an example of one of these tests, the parts and method are explicitly layed out within the standard document. This attachment uses a 3 point bend applied to a coil to test the strength of Electrical Insulating Varnish. The coil, made from various metals, are wrapped tightly around an anvil. The anvil is then removed and the coil placed in the varnish solution. The coated coil is then placed in this 3-point bend and then tested. This is then used to show the properties of the varnish when applied to the metal. As this test uses the appropriate materials in an accurate situation it should produce good results.

Used on some of our smaller systems, the S0981 Tinius Olsen ASTM C736-00 Adhesion Test For Latex Sealants, quite a recent one, this grip design is used to test the strength of sealants and adhesives used in the production of windows. It's quite a complex process to prepare the samples, using a c shaped 'mold' the sealant is injected between a glass and aluminium plate. These are held together using (good ol ') G-clamps. It is then allowed to cure for a specific time... as it's nice to prepare a few of these samples to test, we provided a few kits (C section, and the aluminium and glass plates). It was odd, as you had to remember that the test specimen was a liquid that needed to cure, in a mold. I was something that I had to keep reminding myself. This test allows you to find the Adhesion strength of the Sealant between the desired structural material types. In this case glass and aluminium.